Chrysler Ignition Timing

[Steve51uk]

Hi

I recently bought a 20hp chrysler outboard,the engine is a non runner but i think it has the potential to work again. The engine is complete in reasonable condition not seized, the problem is the ignition. Its a magneto, two coils, two condensers and two sets of points. I have a very weak spark at the HT leads. I assume that if i have a spark then possibly there isn't to much wrong. I'm not a mechanic, but can tackle most tasks. How do i set up the timing? The model No is 2001 twin cylender 2 stroke i think from the early 70s i cant find out much information from the chrysler web site i think the motor is to old and parts are scarse.
Can anyone help cheers Steve

 

[wickware]

Re: Chrysler Ignition Timing

Sounds like my 35HP Chrysler (attached). Are the points clean from oil vapor, not pitted or burned? You will see a cam lob with a direction arrow that will open the points to be set there might be a TDC mark also. Set the points to the specified gap when they are opened at the cam's highest point (.20 I think). I can check notes for more specifics if needed.

The points gap's are the most specific in timing even though the mag can be moved. Do others agree??

Good luck!
Joe

 

[Steve51uk]

Re: Chrysler Ignition Timing

Hi Joe
Everthing is pretty clean, the points gap should be .20 and set about 30 degrees before TDC.Only just found this out, Should this be set up W.O.T?
I'l give it a go next weekend and let you know what happens.
Cheers Steve

 

[wickware]

Re: Chrysler Ignition Timing

The parts and process is like a Tecumseh Engines vs Briggs. Briggs or TDC is easy to measure. There is a scale or dial indicator that fits in the spark's hole that will assist in knowing the exact position of the piston before TDC. BUT! When engines were running bad but had burned points, I replaced or filed/dressed the points (measuring them first at the highest "point opening" avoiding the pitted/burned section) w/o touching the Mag due to the pain of getting it set correctly again. A good boat parts supply house/repair or good lawn mower repair shop should have the scale/ruler to help you know you are at 30 degrees vs assuming the points are correct at the highest opening point. "Should this be set up W.O.T?" The 30 degree spec is the best. BUT! Please let me know if the highest "point opening" is about 30 degrees??


Most of all if you get any signs of a "kick-back or back-fire" you know the timing is off. Briggs would run "in the ball-park but Tecumseh Engines had to be on the money" and it showed in good performance.

I hope I have not confused you with my survival method. Good Luck, Joe

 

[bustermin]

Re: Chrysler Ignition Timing

Yes, the points are to be set @ W.O.T. and set to .20