Yanmar 1GM ??

[Lyn]

Question for those sailors with a 1982 Hunter 27' with a 1gm yanmar- moving forward what's your usual rpm reading when at full throttle? And when in neutral can you push a higher reading?

 

[Steve Dion]

Full throttle should be around 3200 + rpm's

Lyn:The 1GM is rated at 3600 RPM max and 3200 RPM continous. Normal operating range is 2500-3000 RPM. You should be able to rev the engine to about 3400-3600+ in neutral and max out around 3200 RPM in gear. This is making some assumptions. Correct/Clean Prop, Clean bottom, properly operating engine.........

 

[David]

RPM

Lyn, I don't have your model engine but according to Yanmar Diesel Direct the continious rating at the crankshaft is 3400 rpm and 3600 rpm maximum.

 

[Lyn]

Thanks Guys!

Thanks for the feedback Steve, my little engine seems to be running fine then! Happy sailing!

 

[Jim]

I just had this same question

I also have an '82 Hunter with a Yanmar 1GM. Yesterday when I took her out, I couldn't get her past 2200 RPMs. But after 5-6 hours of sailing in 15-20 knots of wind with 3-5+ foot waves, I got the usual 3300 RPMs coming back to the dock. I suspect the bottom and the prop just needed a good cleaning.

 

[Jay Kent]

I agree with

all the previous responses. We run at about 3200 at full throttle, but can achieve 3600+ in neutral. Same boat, same engine.