Johnson 70 Maximum RPM

[marinebird]

I'm looking for info on my 1981 Johnson engine (J70ELCIM).<br />Searched on my shop manual but not specifically for that engine (covered about 10 years) and did not find it.<br /><br />1- What is the maximum RPM at which I'll get this 70 HP?<br />2- What is this engine gear ratio when it gets to the prop?<br /><br />Thanks.

 

[ob]

Re: Johnson 70 Maximum RPM

70 hp @ 5500 rpm<br />Gear ratio is 12:29 or 2.42/1<br />Prop to run 5500 to 6000 at WOT

 

[snapperbait]

Re: Johnson 70 Maximum RPM

Ditto that...