S 2 9.2A 3 Blade Propeller 15 R 11

[Bob McKee]

I have a 1976 S 2 9.2A, several years ago I installed a Yanmar 3GMD engine that produces 20hp at 3400rpm. This engine has opposite rotation from the original YSE12 so the 2 blade LH prop wouldn't work. I found a three blade 15R11 propeller and have been happy with the performance. Yesterday the diver found that it has some alloy depletion, spots are turning reddish and the edges are getting rough, don't know yet where the electrolysis is coming from. Eventually the prop will need to be replaced. Does the 15 R 11 seem to be the correct size for the 9.2A? What size ore others using?

 

[woodster]

I have a 1976 S 2 9.2A, several years ago I installed a Yanmar 3GMD engine that produces 20hp at 3400rpm. This engine has opposite rotation from the original YSE12 so the 2 blade LH prop wouldn't work. I found a three blade 15R11 propeller and have been happy with the performance. Yesterday the diver found that it has some alloy depletion, spots are turning reddish and the edges are getting rough, don't know yet where the electrolysis is coming from. Eventually the prop will need to be replaced. Does the 15 R 11 seem to be the correct size for the 9.2A? What size ore others using?

you may want to contact Michigan propeller and give them all your information on your boat ....and let them recommend the proper prop you need to use or maybe general propeller and shaft service...they both are very good at what they do in relation to your question....

regards

woody