I need to know the Spark Advance Degrees for a 1984 Evinrude 150HP. The sticker is gone from my motor. That said I have know idea what that means. I am attempting to check the timing on this motor and timing is something I have never messed around with before.
I have a Clymer manual but it is Greek when I'm reading it. I found this on iboats which makes a bit more sense to me.
#1
Joe Reeves WOT timing procedure
November 15th, 2007, 10:46 PM
for Johnson/Evinrude
Joe
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(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 temperature.
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.
http://forums.iboats.com/forum/engine-re...cedure?t=228183 Be sure to use your own engines spark advance settings, not the one I picked out of the air here in my notes.
So my second question is if I follow these directions where do I mark on the flywheel so I can check the timing? I don't understand that part. If I set the throttle to full is the timer base suppose to be against the stop? If it is not do I adjust the stop or the cable?
