evinrude 135hp not starting HELP

[Destroyer]

Originally Posted by Kracker Jack

No not the same one. If looking at the plugs the one that had water was bottom left, the one that's dry is top right on a whole different bank! I have everything needed on the other three cylinders (compression,fuel,spark) why aren't they hitting? I'm running a nongap style plug and its always run good with those, did she originally run a gapped prong plug?

I may be wrong, one of our experts can say for sure, but I believe that the original plugs for your engine were surface gap plugs (non-gapped plugs).

As for your non firing... The dry cylinder may be from bad reed valves or no gas getting to your carb. Loosen the drain screw at the bottom of the bowl and see if gas drains out. If it does then it's probably a bad or broken reed. Either way you're going to have to remove the carb, so look at the reed block when you do and if it's a broken reed you'll know it in seconds.

As to the other cylinders not firing, it's a bit of a mystery...but I'd look carefully at your flywheel. There's a key between the flywheel and the crankshaft that keeps the flywheel in the proper position to initiate the spark for the plugs. If that key has sheared and allowed the flywheel to turn on the crankshaft then your timing is off and your engine won't start.. So if it were me that would be my first place to look.