1983' V4 evinrude 115hp Excessive idle speed

[Pessemist]

This one has me perplexed.

Last year I installed a rebuilt head and the engine ran great. The Trim & Tilt motor failed and I yanked the boat out of the water for the season.

I repaired the tilt motor and just re-installed it. Everything works. But when I started the motor it ran at very high revs. I checked the throttle linkage and it was fine. I checked the timing advance and it seemed to be working fine. In fact I could manually push the timing towards hot-run spec and the engine slowed a little until it began to misfire (but still ran a lot higher rev than idle).

The engine starts and runs like it is at 3/4 throttle yet I verified the throttle linkage and carb conenctions are at idle position.

I checked the primer to see if it was injecting gasoline into the carbs after the engine started (pulled off tube--nothing coming out).

Any ideas? I am lost as to what could have changed sitting in a heated garage over the winter?

thanks in advance for any trouble shooting tips.

doug

 

[Big flop]

Re: 1983' V4 evinrude 115hp Excessive idle speed

Check timing. If it's way advanced,
Maybe flywheel keyway Sheared, or center
flywheel magnet came loose
and spun advancing timing?

 

[BKS72]

Re: 1983' V4 evinrude 115hp Excessive idle speed

Check and make sure the manual valve on the primer didn't get turned. It should be turned so its in line with the primer. If this is open it will let fuel flow directly into the cylinders causing kt to idle high.

 

[emdsapmgr]

Re: 1983' V4 evinrude 115hp Excessive idle speed

What do yo consider high revs? Were you idling the engine on the trailer, or while it was sitting level in the water in forward gear? Most outboards will run 1100-1200 at idle when sitting on the trailer.