McCullough Model 78500 - Need year

[mquintana]

I bought a boat which came with this McCullough engine (it looks to be about 2HP) Does anyone know where I can get specs on this engine? (ie. spark plug type, gap, fuel mixture, etc)<br /><br />Thanks.

 

[jarhead7481]

Re: McCullough Model 78500 - Need year

Here is a link to Mccullough motors. It looks to be a 64 or 65 4hp if I read it right.



http://www.discount-marine-parts.com/ob_mcculloch_3.html

 

[steelespike]

Re: McCullough Model 78500 - Need year

If its a 65 thats when the air cooled 4 hp started,5.3 cu in 1 cyl,J18Y plug,set at .035,points set at .020,Fuel mix is presently 40:1 increased from 100:1.after market service manual calls for McCulloch 2 stroke oil or quality 2 stroke oil.TCW3 rated oil is fine.Flywheel nut torque 300-360 in lbs.Sparkplug torque 250 in lbs.