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major modifications since 1983 up to now

General layout In 1976 my Fisher 37 was ordered and delivered to Porto Santo Stefano Italy as an empty hull.
The previous owner ordered at a local workshop the completion of the ship.
The location of the toilet was in the fore cabin on the stb side. On the bb side were located two berths one upon another. The saloon and the galley were located as today. In a quarter cabin on the stb side, where today is the toilet, were also two berths one upon another.
The wheelhouse was shortened by about 60 cm, creating more space in the cockpit, and lowered to somewhat preserve the proportions.
In 1982, as I bought the boat, I ordered modifications to restore almost the same layout as the original Fisher showed at that time. I did no modifications to the dimensions of the wheelhouse.
I'm pretty satisfied with the actual layout. We seldom need 4 berths, almost 2 are enough.
A bigger cockpit has an advantage in the hot Mediterranean summers.
See the actual layout as pdf file: layout.pdf
Bowsprit At the beginning, the original Fisher 37 didn't have a bowsprit. Many years ago, I ordered at a local workshop a bowsprit in AISI 316 steel, who is very similar to the original mounted now on the Fisher 37.
The bowsprit has an anchor roll, a pulpit and is covered with a teak deck.
See a general drawing and some details of the anchor/chain roll as pdf file: bowsprit.pdf
original drawings made by me (in German) scanned in 1 bit mode
Bow thruster In the spring 2000 I mounted a Vetus 80 kgf 24 V bow thruster. The installation was fully done by me.
The necessary high current load is carried through a 75 sqmm cable directly from two batteries of 110 Ah.
The GRP tube was laminated to the hull sides with carbon fiber and epoxy resin.
A bow thruster for the easy maneuvering of a heavy boat with a long keel is a must!
See a picture out of the original Vetus catalogue and the shape of the tube outlet as pdf file: bowtrhuster.pdf
Roller reefing As many years ago I upgraded to a roller reefing system, I choosed the Hood SeaFurl system for the foresail and a StoBoom system for the main sail.
In the same time I ordered an Hood BiStar Cruiser roller reefing genoa and a Hood boom reefing full batten main sail.
The genoa is a good sail and the SeaFurl system is also good. The main sail is an unsophisticated one and the boom reefing system, as all boom reefing systems, is not very easy to use.
Blister About 5 years ago I ordered a North triradial blister. It's a beautiful sail. Now it's upgraded with a Snuffer Plus.
Bathing ladder/gangway Originally my boat was equipped with a stainless steel bathing ladder of 9.5 kg weight and an aluminum gangway of about 12 kg weight. Last year, as I needed the space on the roof of the wheelhouse to install more solar panels, I decided to combine the ladder and the gangway in one element and I fabricated an inner shape with very light and thin plywood. The weight of this skeleton was of about 3 kg. The skeleton was then laminated with diagonal and unidirectional carbon fiber coated with epoxy resin. The new ladder is only 6 kg heavy and swims! For the use as a gangway a glass and carbon fiber board can be applied over the ladder. pictures
Refrigerators Originally in my Fisher was a common, side opening refrigerator with a normal Danfoss compressor. The compressor was mounted in an locker below the floor in the wheelhouse. The cooling of the condensator was poor. I substituted the old refrigerator with a similar one and realized a top opening freezing box of about 50 Liter volume.
The conventional refrigerator has a normal evaporator. The freezing box is equipped with an eutectic cold accumulator plate. Both refrigerators are served by a piston compressor and the condensator is a cooling coil mounted outside the hull of the boat.
Even in the hot Mediterranean summers, I can store fresh meat, vegetables, fruits and all the other food for at least one week.
The compressor, eutectic plate and condensator are fabricated by Frigomar.
Electric toilet Three years ago I substituted the membrane hand pump element of the toilet with an electric piston pump.
OK it's consumes energy, but the comfort is very much higher and the almost yearly substitution of the membrane on the old pump, of course in the wrong moment, was complicated. Now three year without any problem.
I substituted the black melamine cover and sitting by one out of massive, glossy coated teak.
The toilet was made by ORVEA.
Warm water As I bought my boat, no warm water was installed. A 45 litres Vetus boiler heated by the motor cooling water or through an electrical 220V/1500W element is now installed at the far stb below the wheelhouse floor.
The warm water deserves all taps including the shower installed in the cockpit.
Engine In the spring 2001 I substituted the old AIFO M806, 125 hp, 6 cylinders, 5.5 litres, atmospheric, fix mounted engine with the IVECO/AIFO 8041 M09, 95 hp, 4 cylinders, 3.9 litres, atmospheric, mounted on Vetus LMX flexible mountings.
The old engine was equipped with an hydraulic 3:1 rev gear consuming about 20 hp. The new one is equipped with a Technodrive TM 93 2.77:1 gear consuming about 5 hp.
The old engine was fixed coupled to the shaft. The new one is flexible coupled with a Vetus Bullflex coupling.
The insonorisation of the engine room is completely made with Vetus SDP type sound reduction plates.
The reasons for this modification were: 25 years old engine (but still working perfect), some fume at high loads, sound intensity, vibrations and high weight.
I have evaluated a lot of engines in the range of 80 to 120 hp and choosed not to consider turbo charged engines because of the limited reliability and poor performance at idling or low revolutions. After one summer of experience, I'm pretty satisfied with the new engine.
OK, that's only an impression but I noticed only marginal improvements in sound intensity and vibrations (less hard).
Propeller shaft Because of the flexible mounted engine, I had to substitute the old fixed mounted propeller shaft with a "swimming" one. The old shaft was of 60 mm diameter out of AISI 316. The new one has a diameter of 45 mm made in Remanite 1-4462.
On the old shaft there was a fixed stuffing box. The new one has a "swimming" stuffing box.
Shaft, stuffing box, torsion protection and the new propeller are from Vetus.
Rudder I don't know how good the rudder is realized now on Northshore Fishers but on my old one the rudder was built out of an inner stainless steel skeleton and two GRP halves coated and probably laminated each other. For many years I noticed fissures between the two GRP halves and rusty water was coming out of the rudder. I don't know if the stainless steel used for the construction of the rudder skeleton at that time was out of AISI 316 or 308/312. I decided to order at a local workshop a new rudder with a bigger surface.
The new rudder is completely made in AISI 316 stainless steel an the cavity is filled with polyurethane foam.
No any problems since. As expected, the reverse maneuverability of the boat improved very marginally. I notice less rudder given by the automatic pilot in normal ahead use.
See some of my drawings as pdf file: rudder.pdf
Electric circuit Two years ago I decided to substantially improve the energy production in my boat.
For a long time I have evaluated to install a diesel generator but the noise, the complexity of the installation, the weight and the poor space in a 37'' boat were the arguments for an other solution (see also solar panels and wind generator).
I upgraded the whole electric circuit with an additional 110A/24V alternator coupled to the engine (originally on my boat there were 2 alternators of 45A/24V each). Two Vetus Battery Watch/diode splitters for the charging and deserving of the common consumers. I have connected each other the two battery banks forming 440Ah capacity at 24V for the common users and installed two additional batteries of 110Ah/24V for the engine starter, the anchor windlass and the bow thruster.
See a drawing of the main electric circuit as pdf file: electricmain.pdf
Solar panels In my continuous search for energy sources I have mounted on the roof of the wheelhouse (see the picture in the home page) 6 panels connected to 3 x 2, 24V/36W panels. In the peak hours last summer I have reached a current load of 6A.
The panels were made by Sunware and are very simple to install (simply coating to the roof) and are very thin (you can stand on it).
All panels are connected together through a diode splitter and a charging regulator directly to the main batteries.
Last summer, after two days on anchor in a bay and without economies with the consumers (2 refrigerators, day and night!) the batteries were still about half charged. Beautiful! Clean, no noise! I had only to push away the boom to the side to prevent shading.
Wind generator For an additional energy production I have installed on the fore side of the mizzen mast a wind generator Western Marine Aero4Gen 24V.
It works OK, but needs wind of at least 15 kn. You see the wind generator on the left side of the picture on the home page just below the radar antenna.
Cockpit benches During the winter 1994 I substituted the benches by a new construction. The old teak plywood was wearied out and the openings for the lockers were to small. The substructure of the benches and covers consists now of marine plywood full coated and reinforced with glass fiber and polyester. All benches and covers are covered with massive 10 mm teak ledges coated with epoxy resin and partially bolted.
For pictures see the Pictures section.
Aft pulpit The whole cockpit is now surrounded by an AISI 316 stainless steel pulpit. Two life belts, the outboard motor and a Magma marine kettle are fixed to the pulpit.
Osmosis protection/
anti fouling
The original Fisher 37 has below the water line a transparent gel coat who is more resistant to water diffusion than the pigmented one.
My boat was never affected by osmosis because it is only at maximum 2 months per year in the water, but I was informed about Fishers who were affected by osmosis. I don't know if Fishers of current production are better protected.
The whole hull below the water line is now protected against osmosis with a 5 layers coating with International Gelshield 200.
The coating is expensive, but very simple to apply. The preparation of the hull is otherwise a hard work! I needed about two weeks for the preparation and one week for the application of the Gelshield coating.
I use International Micron Extra as anti fouling and apply only two coating layers all two years (limited utilization in water).
I never had fouling (very limited time in the water!).
Gas Installation Spring 2002. Installation of 2 x 3 kg Camping-Gas gas bottles in a gas tight stainless steel box in the rear aft of the cockpit drained to the outside of the hull, electromagnetic check valve, copper tube without intermediary connections and a manual check valve in the galley just before the range. Installed a gimbaled Force 10 range with 2 top burners, grill and oven.
Hull Spring 2002. Full recoating of the hull above water (not the deck) with 3 layers Awlgrip snow white polyurethane top coating sprayed. Substitution of the lowest 2 teak ledges (80x30 mm) on each side and new ledges on each side like the original Fisher. For pictures see the Pictures section.
Waste water system Winter/Spring 2003. Realization of a waste water system consisting of a 230 liter GRP-tank, collection of waste water out of the sinks in the toilet and in the galley and out of the WC. All 3 can be switched directly to the sea.
Realization of a shower in the Toilet room.
See the drawing of the system as pdf-file: Waste water system.pdf
Floor Panels Spring 2003. Out of 6 mm Teak ledges. Seams filled with white Sikaflex 295. Coated with 5 layers of Veneziani Woodmat 2 components polyurethane varnish. See the pictures section.
Fore cabin Winter/spring 2003/2004
full restructuring of the fore cabin, elimination of the water tank below the floor (reduction of the water capacity from total 1000 liters to about 750 liters), insulation of the hull walls, walls and ceiling out of teak and so on.
See the page with some pictures taken during the restructuring
See the page with some pictures.

Installed a Webasto AirTop 5000 24V Diesel cabin heater
Installed a Schenker Modular 60/24 60 liters/hr 24 V reverse osmosis watermaker
Installed a Mastervolt battery monitor BTM-1
Replaced all batteries by Mastervolt gel.
Placed he starter/winch/bowthruster 120 A  batteries in the fore cabin under the berths.
New seat at the navigation table
New floor in the wheel house


Not a lot of work because the boat wintered in Kemer/Turkey and I only had a few tools on board.
Modified the flange between gearbox and the Vetus Bullflex elastic coupling from 4 bolts to 8 bolts.
Modified the water line because it was somewhat convex, OK at the bow and stern but to low (approximately 7.5 cm) at the side. Grinded, primed and 2 x coated with International Toplac.
Below the water line: two complete coats of International Micron Extra and an additional coat of the top 1/2 m. Result after 7.5 months: a lot of small lime worms and some grass. Not very satisfying for such an expensive antifouling!


Sanded the teak ledges on both sides and also the teak pulpit. Applied 4 coats of Coelan Grundierung to the exterior teak parts. Coelan Grundierung is a base coat out of isocyanate, UV-stabilizers and yellow pigment. Penetrates the wood well and remains breathing active. At least 4 layers have to be applied. Is a little to high pigmented and the natural grain of the wood will be covered to much.
All the cushions got new covers out of the original Alcantara (not the chinese or turkish one ;-) )
See some pictures.
New membranes for the Watermaker.

Repainted the teak outside and repainted the floor inside. Polished the hull. Sealed the acrilic of the hatches with silicone.
Repainted the whole deck with International Perfection with a 1:1 mix of cream S070 and white B000. Until mid may it was practically impossible to get good painting results. The most previous trials ended in "to do it again" :-(... The weather was simply to cold and to wet. I used brush, short hair rolls and fine sponge rolls. The best results were obtained with the fine sponge rolls but they had to be substituted after max. 1 hour. Painted the antiskid with the same paint + antiskid powder. Repainted the exterior wood parts. Complete overhaul of the WC. Installed an EPIRB GME MT 403. New Magma gas fired barbecue. New sun roof for the cockpit. New GPS antenna Raymarine Raystar 125. Substitution of the motor for the compressor of the fridge. New 43m2 genoa and covers for the hatches from Elle Sails Portoferraio.
In a long work replaced the silicone sealing between the acrilic glass and the aluminum frame of the fore hatch by the appropriate Sikaflex combination.
New membranes for the watermaker.
New VHF transceiver Raymarine Ray 218E. New speed/log Raymarine + transducer ST60+. New Wind instrument + mast unit Raymarine ST60+.
Substitution of the fridge compressor and of the exterior condensator coil. Substitution of the seat in the wheelhouse.
Sustituted the 140 m x 10 mm galvanized anchor chain by 100 m of an inox chain out of DIN 1.4570 / AISI 316Ti and also substituted the chain sprocket of the anchor winch.

Varnished the side Teak ledges 2 x with Cetol Marine. 2 x International Toplac to the waterline. 3 x Coelan Primer to the cockpit benches. Painted & some grp repairs to the dinghy.
Substituted the old Humminbird echo sounder by a Raymarine ST60+. Substituted the power alternator Mastervolt 24/110 with a new one. Installed a new Alpha alternator regulator. Substituted one of the two Vetus battery watch by a Mastervolt Battery mate 1602.
New mizzen sail with lazy bag and lazy jacks, a new sun awning, new pale blue sunbrella cockpit cushions and smaller things from North Sails Marmaris TR. Good and professional work.
Installed a fresh water flushing for the anchor chain. Works during the lifting of the chain.
Substituded all rubber gaskets of the portholes and painted with Veneziani Gummipaint.
Added 50 mm2 cables to the existing battery connections.


Substituted the Vetus BCC2000 chager/inverter by a Mastervolt Mass Combi 24/2500-60 charger/inverter.
After 22 YearsI had to substitute the Life Raft. The new one is similar to the old one. The new one is an Eurovinil ISO 9650 Italia for 6 persons.
Sanded the teak gunwale and varnished by 4 coats of Coelan Primer.
Sanded and varnished the whole interior floor with 4 coats of Veneziani Wood Mat.
Solar panels: 2 additional solar panels Asseaboat/Solbian Sun Bar Mini Rail SP50L + 2 additional solar panels Solbian SP50Q + 3 step up WMarine10 MPPT charge controllers
Sunbrella cover for the main boom. Sunbrella cover for the new Life Raft.
Summer 2013: Replaced the inox anchor chain DIN 1.4571/AISI 316Ti because of breaking of some soldering. New chain 80m of galvanized ISO4565 chain from Maggi Italy.
Replaced the pumps for the Watermaker.


Substituted the level gauge of the black water tank.
Substituted the insulation of the fridge box. Old insulation: 60mm of Polystyrene foam. New insulation: 3x10mm of Cryogel Z.
Substituted the motor of the fridge compressor.


See some pictures here.
There were no osmosis bubbles but the humidity in the GRP was at some sparse spots as high as 8%
Sandblasted the whole underwater part down to the gelcoat November 2014
Partially sanded away the gelcoat where more porous
Left dry from November until mid of April. From January until End of April also from the inside with a dehumidifier. At the end the humidity was everywhere below 3%
Reconstruction with the Osmosis treating program of International comprising:
- Epiglass HT9000 epoxy resin where the gelcoat was sanded away
- Interfill 830 & Interfill 833 epoxy filler to obtain again a smooth surface
- 4 coats Gelshield Plus solvent free epoxy resin
- 3 coats Gelshield 200 epoxy resin with solvent
- 2 coats of Interprime 880 epoxy primer at the water line
- 3 coats of Perfection PU varnish at the water line
- 2 coats of antifouling Micron Extra EU
Replaced all shrouds at the mizzen mast
Cutted away 7cm of corroded mizzen mast feet and new mast support out of CRP
New teak grating on the cockpit floor
Replaced the 38 years old anchor windlass with an identical new one
New remote radio command for the windlass with a chain counter
New dinghy Zodiac Cadet 240 Aero
New batteries, 4 x 220 Ah and 2 x 140 Ah Vetus AGM
Overhaul/reparation of the ladder/gangway
Overhaul and substitution of all bearings at the Aero4gen wind generator
Overhaul of the Orvea electric toilet
New varnish to some lockers
New automatic fuses, 150A for the bow thruster and 100A for the anchor windlass
Replaced all brass thru-hull fittings and seacocks with bronze ones.


See some pictures here.
I decided to substitute all windows, the covers of the side walls and the ceiling in the pilot house therefore I had to dismantle a lot of teak parts. Then it was somewhat obviously to size the opportunity to lift the roof, take out the engine and to let revise them.
- Revision of the engine from 2001 with about 6000 hours of service. Substituted the con-rod bearings and the piston rings. Substituted the core part of the sea water pump. Substituted the diesel pump. Revised the injection pump. Substituted the exhaust water mixing elbow. Planed the cylinder head. Grinding the valve seats. Some other smaller revision and substitution works.
- A little bit of insulation of the under side of the roof with 10mm styrofoam and new ceiling out of a vinyl leather imitation.
- New side walls out of 4mm marine plywood and 4mm of plywood with a veneer of walnut bonded together.
- New windows from Nautica F4 .
- Bordered the old Vetus sound barrier plates in the engine room with plastic and aluminium shapes. Substituted a small part of the sound barrier plates.
- Sanded the "floor" of the engine room and painted the whole middle part with Veneziani Ceramite, an epoxy high build paint for bilge, tanks and cabinets. Painted the rest of the "floor" with 2 coats of 2 components polyurethane primer and 4 coats of 2 components polyurethane finish.
- Substituted the rubber lip type of stuffing box from Vetus (never really tight) with the old conventional stuffing box with glands also from Vetus. Soldered a water inlet. Greased the glands before assembling. Still tight after 3 weeks...
- Calibration of the propeller.
- Substituted the Frigomar fridge with the 80 litre fridge of Frigonautica with remote compressor and through the hull keel cooler.
- Sanded the whole teak toe-rail, applied two coats of Coelan Bootsgrundierung yellowish primer and 6 coats of International Schooner Gold varnish.
- Sanded the teak seats in the cockpit, applied one coat of Coelan Bootsgrundierung yellowish primer and 6 coats of Coelan Bootsbeschichtung (more elastic then Schooner Gold).
- New TV Samsung 22" T22E390EW and new, bigger omnidirectional Glomex antenna.


Sanded the teak handrails, applied 1 coat of Coelan Bootsgrundierung yellowish primer and 5 coats of Epifanes Clear Varnish.
Light sanded the teak toe-rail and applied 2 coats of Epifanes Clear Varnish.
Light sanded the teak seats in the cockpit and applied 2 coats of Coelan Bootsbeschichtung diluted 50%.
Teak parts in the pilot house changed fixation from screws covered with teak plugs to uncovered brass screws.
Sanded and varnished with two component PU semi gloss varnish the upper teak parts in the pilot house.
Adjusted the water line.
Substituded the cable for the level indicator of the fresh water tank.
Thoroughly cleaned the hatch of the pilot house, applied Sika cleaner 205, primer 210T on the aluminum frame, Sika primer 209 on the plexiglass pane and sealed with black Sikaflex 295UV.



- Substitution of the 4 lateral solar panels on the roof of the pilot house. The old ones were of 36Wpp each. The new ones of 110Wpp each flexible ETFE marine solar panels from Offgridtec were bolted to the roof.
The new solar panels are a little bit more wide so I had to cut away the fixations of the hand rail und to substitute both hand rails with new ones out of teak wood.
Below the old panels the gel coat looked terrible so i had to sand away the whole gel coat and to rebuild the surface with epoxy resin, some glass mats, epoxy filler, epoxy primer and 2 components PU varnish to obtain a good and glossy flat surface. I used almost International products.
- Repairing of the ladder/gangway through some GRP work and stainless steel.
- Substitution of the old fridge box with a new one. Substitution of the fridge compressor unit who was a huge current consumer. The fridge box was custom made out of plates of the Isotherm kit SCD00001AA bonded together with Sikaflex.
The cooling unit with evaporator plate, compressor and external condensotor coil is from Frigonautica.
Now Rondinara is equipped with two fridges of 80 liter each, one side opening and one top opening. Both fridges together consume even in hot days about 500Wh per day.
- Substituion of the old Hood Stoboom main sail (into the boom furling main sail). The boom had also to be substituted by a Seldén boom. The new main sail system will be a lazy bag/lazy jack one from Elvström.
- Substitution of the level indicator of the black water tank.

See some pictures here.
- Varnished the door to the pilot house. Applied 6 coats of Epifanes Clear Varnish.
- Slightly sanded the teak grating of the bow sprit and oiled with teak oil.
- Slightly sanded the teak toe-rail and applied 2 coats of Epifanes Clear Varnish.
- Slightly sanded the teak seats in the cockpit and applied 3 coats of Coelan Bootsbeschichtung diluted 50%.
- Slightly sanded the floor of the pilot house and some othere interior parts and varnished with two component Veneziani Wood-Mat
- Thoroughly sanded the lateral teak ledges and oiled with 7 coats of Owatrol Decks Olje D1.
- Applied two grease nipples to the stuffing box.
- Substituted some parts of the watermaker.
- New Sunbrella cover for the windlass.
- New Victron 50W fotovoltaic panel for the winter.
- Varnished the exterior teak ledges with 5 coats of Owatrol Decks Olje D2.
- Slightly sanded the teak toe-rail and applied 3 coats of Coelan Bootsbeschichtung diluted 50%.
- Modification of the Schenker watermaker from two 24V pumps to one 220V pump. This allows to raise the pressure to 7.5 bar and to get about 70 Liters of fresh water per hour. The 220V pump uses about 550Wh fed by the inverter.
- Due to the Covid restrictions it was not possible to carry out further work.

See some pictures here
- Overhauled the Aero4gen wind generator. Substituted the bearings.
- Substituted the 4 Vetus AGM main batteries 12V 220Ah = 2 x 24V 220Ah with 2 LiFePo4 Liontron batteries 24V 100Ah = 24V 200Ah. The Vetus batteries were at 25% health after 5 years.
- Substituted the 2 Vetus AGM start & bow thruster batteries 12V 140Ah = 24V 110A with 2 Victron AGM 12V 130Ah = 24V 130Ah. The Vetus batteries were at 40% health after 5 years.
- Substituted the Mastervolt 24V 110Ah alternator.
- Installed two new Solbian solar panels 78Wpp each on the middle of the roof of the pilot house.
- Overhauling of the lifejackets.
- Applied two more coats of Owatrol Decks Olje D2 to the lateral teak ledges.


See some pictures here
- Substituted the 40 litre Vetus boiler with a new 30 litre Isotemp boiler.
- Full overhauling of the anchor winch.
- Full overhauling of the electric toilette.
- Modification of the stuffing box.
- Substitution of the 4  flexible solar panels on the roof of the wheel house with 4 rigid OLP solar panels from Offgridtec.
- Elimination of the Treadmaster in the cockpit, levelled the floor with epoxi GRP and painted with Interdeck antiskid paint from International.
- Slightly sanded the lateral teak ledges, applied 1 coat of Coelan Bootsgrundierung yellowish primer and 3 coats of Coelan Bootsbeschichtung diluted 50%.
- Substitution of the Charger/Inverter Mass Combi 24/2500/60 with the CombiMaster 24/3000/60 + Easy View 5 Controlling unit all from Mastervolt.


See some pictures here
- substitution of the four upper parts of the sunroof for the cockpit
- substitution of the second power distribution panel
- substitution...

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