Hello -I have a 1960 16' alumn V that I would describe as on the heavy side for this type-'62 28 horse Johnson motor.the motor seems to be running well but dosent seem to rev out as I expected-seems like timing isnt advanced(though it seems to be at spec in checking synch)-kind of flat. so,being new to all this,there is a good chance that I am just realizing this is all my motor has,but I'm trying to eliminate possible issues. this said, on to my question...the factory brochure for the motor lists the prop as being aluminum 3 blade,10 1/4 diam 12 1/2 pitch. what has been installed at some point is a brass 4 blade-seems to be the right diam. stamped in it are michigan AMC 464. I did write michigan wheel an e mail but was hoping someone here might have referance handy,or advice as to wether or not say the wrong pitch(if so),the 4 blades or heavier brass could be an issue. Steve
NEW QUESTION-I spoke to a helpful guy at a prop shop on the telephone who said my brass prop was for my motor but geared towards skiers,lower end,etc. and said the old brass props were not very efficent.I believe he said the pitch on it was 11-he recommended going to 9" diameter with the same pitch in a 3 blade aluminum prop.I cant afford a new prop now,but I am an experienced metal worker and could cut down this old brass one to the smaller diameter- wouldnt this acheive similar results in getting RPMS up? Steve
NEW QUESTION-I spoke to a helpful guy at a prop shop on the telephone who said my brass prop was for my motor but geared towards skiers,lower end,etc. and said the old brass props were not very efficent.I believe he said the pitch on it was 11-he recommended going to 9" diameter with the same pitch in a 3 blade aluminum prop.I cant afford a new prop now,but I am an experienced metal worker and could cut down this old brass one to the smaller diameter- wouldnt this acheive similar results in getting RPMS up? Steve
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