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#1
02-27-2009, 02:32 AM
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| yamaha 30 HP vs 28HP powerhead Good day ladies and gentlemen I would like to know if the cylinder block for an old model 689 30AE is the same as for what appears to be a very similar 28 HP motor. Was the difference in HP rating as a result of compression rating or a different throw on the crank? or was there a difference in the bore? I am trying to restore the 30hp motor but there are apparently some cracks in it. I have access to a 28HP block which i would like to use if possible thanks Alan Ford  |
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