Check/Fix/Replace Starter Motor 1996 50hp

[Chris1956]

You can usually test the spark timing with all but one of the spark plugs removed, and a timing light on the remaining spark plug, in the top cylinder.

Joe Reeves was an iBoats member who worked at OMC for a long time and published a timing procedure for OMC products that doesn't require their specialized equipment. You might search for it here under "Joe Reeves method".

 

[saltchuckmatt]

Thanks. It cranks when the spark is off (I wouldn't say well). Voltage drops about 3.5V. Cannot crank when circuit is set to spark. I'd like to test the spark timing, can I do this without cranking using the starter motor. Is it time to do electrical tests on the wiring, from ignition switch to solenoid?

Without going back through the posts, and assuming this is a remote motor, have you removed the control box plug from the motor and then try testing the starting stuff back at the motor. Usually I jump the solenoid and at that point the kill circuit will somewhat be removed from the system. At least it'll tell you if it's in the control box or back at the motor. Racer one and Chris know a lot so maybe it's just what they suggest but kill circuit is a known problem.