Evenrude HP and year

[wi_boat_nut]

I just bought a used Evenrude motor that looks like a 40hp. the model numer is 40752E and serial E02598. Can you tell me the year and HP?<br />Also, it has a bad intermitant miss at full throttle and idles rough. I wanted to start by changing spark plugs. The current plug is a champion J6C. Is this correct and what is the gap supposed to be? Any help is greatly appreciated.

 

[NathanY]

Re: Evenrude HP and year

That is a 1967 40hp.<br /><br />I would start by checking that you are getting fire on both cylinders, and do a compression check. If that check out ok, do a thorough decarb, and maybe clean the carbs, and put some fresh gas in it.

 

[wi_boat_nut]

Re: Evenrude HP and year

Thank you. Do you know what the compression should be? How about the plug gap. The gas is fresh.

 

[NathanY]

Re: Evenrude HP and year

Good compression would be anything over 110 on that motor, with no difference greater than 10%. Im not real sure on the plug gap, but .030 is pretty standard.

 

[wi_boat_nut]

Re: Evenrude HP and year

Thanks.<br />Another few questions:<br /><br />There is a fuel mix hand knob adjustment on the front of the carb, any idea on the number of turns?<br /><br />Also, the choke adjustment is closer to lean, any ideas there?<br /><br />Finally, the motor has three settings on the choke, full choke, automatic, and no choke. I understand to choke it when starting, but when running, should it be in automatic or off?<br /><br />I really appreciate your help.

 

[SeaMasterZ@aol.com]

Re: Evenrude HP and year

crank the mixture screw in til it starts to miss, then bring it back out til it smoothes out<br /><br />I like to manually choke it for 15 seconds, then turn it off - but thats just me, you have to mess around with it til you find what works best<br /><br />I had an old mc culloch that was rough at idle, took the idle needle out, sprayed berkebile 2 + 2 in there with the little straw they give ya, cleaned up the needle with crocus cloth and berkebile and it was great<br /><br />but wait to see if anyone says there is a spring in there that might get unsprung in the process

 

[Lark40]

Re: Evenrude HP and year

The best and most frequent advice for new owners is to buy a repair manual. There are several pages devoted to carb adjustments.<br /><br />A link the bottom of this page will take you to where you can get manuals. I like the Clymer, other prefer the Seloc. Either will help you.