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Merk 150 hp, no spark

John, Unfortunately this is more complicated than the points and condenser ignition and requires a special peak volt meter. There is a long shot try that may identify the problem easily and that is to locate the rectifier, disconnect it and crank the engine looking for spark. Beyond this there is a lengthy procedure to verify the peak voltage from the stator, trigger voltage, and a pack failure. These parts are expensive items to replace and most shops will only replace the full electronics package to prevent one component from damaging another. The wiring is a type of high voltage insulated rubber that with the age of your motor will very likely be dried out and cracking causing shorts to ground. If this is the case, you may have some luck trying to put rubber tubing in place of the dried insulation. If you live near Kansas City, I can help. Sorry for the bad news.

Don Dando

 Don
Jul 13
2006
This post is totally non-applicable to the Merc 1500. It is applicable ot the 1980's inlines.

-W

 Clams
Jul 14
thanks don

my merc is an oldy and still has a distributer.

most of the parts you list aren't on this motor, beleave me i looked. i spent 2 hours last night messing with it before it really hit me that it had a dis the trigger was in the dis not under the flywheel.

i've owned a lot of boats and had ob's from the 50's 60's 80's and 90's but this is my first 70's motor so i did a little tail chasing but i think i am moving forword now.

anyway i am in kc too. what kinda boats you got? what lake you use?

JOHN

Don Dando wrote:

 rgp
Jul 13
   
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