1965 Evinrude, 75 HP, Model 75583 S

[JJ Jones]

1st Question: Can anyone let me know what kind of mpg I should be getting from this engine. The engine is on a 18 ft. Starcraft.<br /><br />2nd Question: What kind of compression reading should I be seeing.<br /><br />Thanks !<br /><br />weimar63@mach1pc.com

 

[JB]

Re: 1965 Evinrude, 75 HP, Model 75583 S

On your second question, JJ, all cylinders should compress withing 15% of each other using identical technique. This is the important concern in compression testing.<br /><br />Actual PSI readings will vary with the guage and technique but typically exceed 100PSI. On a 40 year old engine I wouldn't worry about readings if they are over 85-90PSI.<br /><br />Good luck.

 

[R.Johnson]

Re: 1965 Evinrude, 75 HP, Model 75583 S

At wide open throttle that engine will burn 7.5 gal. per hour, and that old 75 will.

 

[drops]

Re: 1965 Evinrude, 75 HP, Model 75583 S

Yeah I know how that goes... i have a 1965 75 horse also.

 

[JB]

Re: 1965 Evinrude, 75 HP, Model 75583 S

A 5 year old thread, drops.