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    1977 70HP 3 Cylinder Sleeving question

    Hi, I am currently running a 1977 70HP Evinrude 3 Cyl on my 1972 17' Baja... When I first got the boat about 5+ years ago I had discovered it wasn't making full power.... I did new coils, plugs and wires, rebuilt carbs, and found compression low on #3 cylinder (lowest one on powerhead)... pulled...
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    1977 Evinrude 70 HP, Ethanol, Octane and such...

    Hello, Recently was playing around with my 1972 16' Baja equipped with a 3 cylinder 1977 Evinrude 70 on it... I noticed that I wasn't getting all the WOT rpm's that I used to get from the OB... seems that the plastic jacket over the wires going up to the timing advance plate, were getting "hung...
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    "Prop-er" etiquette?

    Can someone explain the relationship of diameter change AND pitch change for a boat running same weight and HP? like how will the RPM's change?? I always remembered it to be an increase of 200 RPM for each inch LESS pitch for same prop material.. AND I remembered it to be a decrease of about...
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    1977 70 HP puzzlement

    Re: 1977 70 HP puzzlement Success! Carbs were the problem... Fires on all three now.... apparently the "subtleness" of hearing the other two cylinders fire while on the muffs escaped me.... now that I hear all three firing, I can tell that number one WAS firing when I sprayed stuff into the...
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    1977 70 HP puzzlement

    Hi I have a 1977 Evinrude 70 HP 3 cylinder OB that has me a little stumped and I am hoping for some feedback and suggestions to fix her... To start off with, this OB is on a 1972 16 foot Baja that my son purchased about 3 1/2 years ago... when we got it it ran OK, but seemed a little lacking in...
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