1988 110 Evinrude Timing Question.

w2much

Lieutenant
Joined
Jun 22, 2005
Messages
1,292
This motor is running great thanks to all of the help from this forum. Was given to me and taken on as a project then an obsession. Can this motor be static timed to spec. I worked on a 4 cylinder 100 HP Merc which had the same timing specs as this Evinrude. After determining TDC I was able to time it while cranking the motor with the plugs out and wires grounded. As the idle and WOT timing specs are the same can the Evinrude also be timed in this manner ? The manual of course states timing to be done in a test tank. I just don't happen to have one.Appreciate your replies.
 

Walker

Captain
Joined
Jun 15, 2002
Messages
3,085
Re: 1988 110 Evinrude Timing Question.

As the idle and WOT timing specs are the same can the Evinrude also be timed in this manner ? .

Not sure I understand what you mean here. Idle timing and WOT timing are certainly different on your motor.
 

Dennisanoka

Petty Officer 1st Class
Joined
Jun 10, 2007
Messages
252
Re: 1988 110 Evinrude Timing Question.

I have not done this but I am sure it is a proven method otherwise it would not be posted here so many times.



Here's Joes' timing method.

Timing At Cranking Speed 4?)
(J. Reeves)

NOTE: If your engine has the "Fast Start" feature", you must disconnect/eliminate that feature in order to use the following method. The "Fast Start" automatically advances the spark electronically when the engine first starts, dropping it to normal when the engine reaches a certain temperture.

The full spark advance can be adjusted without have the engine running at near full throttle as follows.

To set the timing on that engine, have the s/plugs out, and have the throttle at full, set that timer base under the flywheel tight against the rubber stop on the end of the full spark timer advance stop screw (wire it against that stop if necessary).

Rig a spark tester and have the gap set to 7/16". Hook up the timing light to the #1 plug wire. Crank the engine over and set the spark advance to 4? less than what the engine calls for.

I don't know the full spark advance setting your engine calls for, but to pick a figure, say your engine calls for 28?, set the timing at 24?. The reasoning for the 4? difference is that when the engine is actually running, due to the nature of the solid state ignition componets, the engine gains the extra 4?.

If you set the engine to its true setting at cranking speed, when running it will advance beyond its limit by 4? which will set up pre-ignition causing guaranteed piston damage! You don't want that to take place.

No need to be concerned about the idle timing as that will take care of itself. The main concern is the full advance setting.

Be sure to use your own engines spark advance settings, not the one I picked out of the air here in my notes.
__________________

When in doubt...use the manual
 

w2much

Lieutenant
Joined
Jun 22, 2005
Messages
1,292
Re: 1988 110 Evinrude Timing Question.

Thank You both for your replies.Perhaps my question was a bit vague but I did the the answer I was looking for. It was the preignition and possible piston damage I was concerned about. The timing tip was great. Thank You again.
 
Top