Re placing a Volvo 2002 with a Volvo D1-30 ( Contributed Keith Murray)
What motor did the boat originally have? 18hp Volvo 2002
What was it replaced with? 28 hp Volvo D1-30
Any significant problems? No
Saildrive or shaft driven? Saildrive for both
What modifications if any had to be made to engine mounts etc? Very little. The back of the half round support had to be lowered about 20mm to clear the sump. I was able to do that myself.
Were any accessories eg compressor ,fitted with motor? None. I will not tolerate compressor on motors for fridges as it is stupid to run a 28 hp motor just to drive a freezer compressor. Electric fridges and freezers are trouble and maintenance free and last for ever. The new motor has a 110 amp alternator with reasonably intelligent regulator and I have solar panels.
Salt or freshwater cooled? Original motor salt water cooled, new motor fresh water cooled
Approx cost and date of fitting? Feb 2009, $20,000 for motor, saildrive, 3 bladed feathering prop and installation.
I have not needed to repair anything on the motor and did not expect to do that. I did have to move the header tank for the coolant from its manufactured position and can send a photo if that is of interest. We also modified the back of the companionway steps to allow room for the front of the pulley for the v belts.
Replacing 1GM Yanmar with 2GM ( Contributed Tarragon , Chris Barton)
What motor did the boat originally have? 8 hp Yanmar
What was it replaced with? 2gm20 Yanmar
Any significant problems? No
Saildrive or shaft driven? Shaft
What modifications if any had to be made to engine mounts etc? No
Were any accessories eg compressor ,fitted with motor ?. None
Salt or freshwater cooled? Salt
Approx cost and date of fitting? 1990s
Any tips, things you would have done differently etc. anything we should know. I did not replace the engine myself was done by previous owner. I replaced the 2 bladed prop with a 3 blade fixed after some slow trips up the harbour against wind and tide. The motor is rated at 16 hp at full revs 3000rpm will do 6 knots in flat water although the boat stern in being pushed down, only slows to 5 knots at 2500 and is far more a comfortable ride. I suspect the design of the raven 26 would not really gain any more speed benefit from the addition of more than 15 hp, probably just continue to drag the stern down into the water...in saying that I am very glad to have the additional horses, the boat can basically turn in its own length, Being salt water cooled means a simple setup but probably living on borrowed time with the inevitable corrosion going on inside the engine block.
Replacing old style 9/10 hp Yanmar with 1GM10 ( contributed Kellys Eye,Scott Hudson
What motor did the boat originally have?
The original which was a large 9 or 10 HP Yanmar.
What was it replaced with?
Yanmar 1GM10 – a single cylinder 9HP.
Any significant problems?
Not a problem as such but as the new engine rotated the opposite way to the original, a new prop was required.
Saildrive or shaft driven?
What modifications if any had to be made to engine mounts etc?
New mounts were installed. Also a new dripless shaft seal replaced the old greased twine stuffing box.
Were any accessories eg compressor ,fitted with motor?
Salt or freshwater cooled?
Approx cost and date of fitting?
Engine $8,000. Total job $13,000. I had money then.
Any tips, things you would have done differently etc. anything we should know.
Yes. The original engine included a small diesel tank on top that was manually gravity filled from the main tank under the cockpit seat. The new engine didn’t have this tank. It was fed directly from the main tank.
I learned the hard way one day that letting the tank get below half full then having the boat heal in a strong wind, would result in air being sucked instead of fuel. I did this twice – and bled the fuel system twice - in a blow and big seas just off Mana (Porirua), before I worked out what was happening.
Another small regret. In hindsight is that I didn’t get the 18HP engine for extra capacity to run a compressor.