I am looking at buying a 27 catalina with a 1 cyl yanmar and would like to have some feed back on what to look for ie: problems with the engine. The boat is 1978 and the engine has not been rebuilt.Thanks
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Bill
No Expert
I'm no expert but I doubt that engine is original to the boat. That engine is about 10 hp and, dependent on your sailing waters, may be a little underpowered. The engine itself is kind of like the African Qeen... putt putt...putt. It is a very reliable engine however.
I'm no expert but I doubt that engine is original to the boat. That engine is about 10 hp and, dependent on your sailing waters, may be a little underpowered. The engine itself is kind of like the African Qeen... putt putt...putt. It is a very reliable engine however.
and it depends on which engine too.
Derek: There were several 1 cylinder Yanmars. The only one that is current production is the 1GM. The older ones are difficult to get parts. I also doubt that this was an original engine.
Derek: There were several 1 cylinder Yanmars. The only one that is current production is the 1GM. The older ones are difficult to get parts. I also doubt that this was an original engine.
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Greg
SB12's were used by Catalinia in their 27's
Of course so was just about every other conceivable marine power plant. If you've got a 12, it's a great, famously reliable and capable engine. I have one that's been pushing a 6-ton S2 around for 20 years now.
Of course so was just about every other conceivable marine power plant. If you've got a 12, it's a great, famously reliable and capable engine. I have one that's been pushing a 6-ton S2 around for 20 years now.
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David
one banger
I don't know on what basis the previous posters would doubt that this vessel you're looking at would have the original engine. I don't think 20-30 year old marine diesels are unusual. There were a number of single cylinder yanmar diesels in use around 1978: the YSB, YSE,YSM, SVE, and SB. All had about 8HP which may be the biggest drawback. Its barely enough power for the boat. The 1GM is too new to have been original in a 1978 vessel. There should be a tag on the engine with the model number. My 1979 Hunter 27 has an SB-8. Its 22 years old and original. It doesn't smoke, drink (oil), and starts instantly. I don't know what experience the previous posters have but I haven't had any problems with getting normal maintenance parts (www.torressen.com) such as filters, gaskets, metric screws, hoses, impellers. I haven't needed anything else. I run it a lot when we are aboard - either for propulsion or charging batteries. It runs about six to eight hours per gallon. The H-27 weighs in at about 6500 pounds and I would be happier with a 12HP diesel for driving it. 8HP is OK on flat water without current or headwind. Under those conditions with a clean bottom and no load I can get 6 knots. Typical after the boat is loaded up for cruising is more like 4.5 knots. Into a 25 knot wind and 4-6ft seas I have slowly been pushed backwards under power. Good luck David
I don't know on what basis the previous posters would doubt that this vessel you're looking at would have the original engine. I don't think 20-30 year old marine diesels are unusual. There were a number of single cylinder yanmar diesels in use around 1978: the YSB, YSE,YSM, SVE, and SB. All had about 8HP which may be the biggest drawback. Its barely enough power for the boat. The 1GM is too new to have been original in a 1978 vessel. There should be a tag on the engine with the model number. My 1979 Hunter 27 has an SB-8. Its 22 years old and original. It doesn't smoke, drink (oil), and starts instantly. I don't know what experience the previous posters have but I haven't had any problems with getting normal maintenance parts (www.torressen.com) such as filters, gaskets, metric screws, hoses, impellers. I haven't needed anything else. I run it a lot when we are aboard - either for propulsion or charging batteries. It runs about six to eight hours per gallon. The H-27 weighs in at about 6500 pounds and I would be happier with a 12HP diesel for driving it. 8HP is OK on flat water without current or headwind. Under those conditions with a clean bottom and no load I can get 6 knots. Typical after the boat is loaded up for cruising is more like 4.5 knots. Into a 25 knot wind and 4-6ft seas I have slowly been pushed backwards under power. Good luck David
Catalina was using Atomic 4's.
David: Catalina was primarily using Atomic 4's during this era. Many of the C'27's where powered by O.B. engines.
David: Catalina was primarily using Atomic 4's during this era. Many of the C'27's where powered by O.B. engines.
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David Foster
No problems with my '77 SB1
on my '77 h27. I maintain it, and it works. No problems with parts availability. A very reliable engine that is probably still not anywhere near the end of it's life. David Lady Lillie
on my '77 h27. I maintain it, and it works. No problems with parts availability. A very reliable engine that is probably still not anywhere near the end of it's life. David Lady Lillie
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Derek
yanmar ysb8 1 cyl
Thanks for the great feedback. The engine is a YSB8 rwcooled. I don't know if its the original engine, owner passed away and there's no engine log.? are parts easily available,any problems I should watch out for? Thanks Derek.
Thanks for the great feedback. The engine is a YSB8 rwcooled. I don't know if its the original engine, owner passed away and there's no engine log.? are parts easily available,any problems I should watch out for? Thanks Derek.
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Jack Gilmour
78 SB12
Last year I sold a Sun Yacht with a 78 SB12 with about 500 hours. We experienced NO problems with the engine in the 22 years we owned it. Only maintenance was preventative per the owners manual.
Last year I sold a Sun Yacht with a 78 SB12 with about 500 hours. We experienced NO problems with the engine in the 22 years we owned it. Only maintenance was preventative per the owners manual.
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