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Compression Good What next

J

jamiel

Member
Checked compression and is ar

Checked compression and is around 150/150/150/155 on my 79 evinrude 100 . This a strong running engine and seems that I would not have problems but when in the water the enngine seems to lack power . One of my biggest concerns is still the timer base . it doenst fully touch the high speed adjust knob. It seems fine on the hose but engine just seems to coast even with throttle push to the floor . went to local river last night and did run well .was able to get fast enough to plain off but did not accelerate as fast as I think it should .Also notice that since i clean the water spout from water pump the engine is not getting has out . is this good or bad?
 
Do you have strong spark (

Do you have strong spark ( 7/16" gap ) at each cylinder? These engines can and often run on 3 cylinders.The " high speed adjustment knob " is a full advance timing stop and it needs NO ADJUSTMENT unless someone fools with it.Have you looked into the carburetors at full throttle ( with a strong flashlight ) to see fuel delivery from the high speed jets??? That is a simple " no money required " way to monitor engine operation.
 
"With the engine NOT RUNNING b

"With the engine NOT RUNNING but in forward gear (spin the prop when putting into gear), have someone advance the throttle slowly while you observe the timer base. It should slide smoothly from the idle position allt he way to the full advance spark position.... up against that rubber bumper (full advance stop screw).

If it sticks, it is usually due to one of the four "L" clamps being slightly too tight. You may be able to pry the offending clamp upwards slightly with a long thin blade screwdriver.

At the worse, you would need to remove the flywheel, stator, and timer base, then clean everything thoroughly. Use grease on the brass bushing portion of the timer base and the related top portion of the powerhead's upper main bearing assembly, BUT use only OIL on the timer base nylon bearing retainer.

Upon assembly, check all of the "L" clamps for being overtight and install a very thin spacer washer under any that cause the timer base to stick.

When time permits, visit my eBay store at: http://stores.ebay.com/Evinrude-Johnson-Outboard-Parts-etc?refid=store"
 
Where are the L clamps located

Where are the L clamps located and if I remove the flywheel it must put back in exactly the same place correct
 
"Make a note.... The flywheel

"Make a note.... The flywheel nut, upon installing, must be torqued to 105 foot pounds. Anything less will result in a sheared flywheel key and damage to the flywheel and crankshaft tapers.

The flywheel is fitted to the crankshaft via a woodruff key. It will only go on one way.

Look under the flywheel at the bottom of the timer base. You'll see a retaining ring (usually white nylon). That ring has 4 stainless steel clamps spaced evenly around its circumference that holds the timer base down."
 
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