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Merc 225 firing order

woodeye

New member
I changed cap and wires on for

I changed cap and wires on ford 302. Thought I followed correct order but motor has no power above idle and back fires through carb. Where can I find the firing order. Motor is aprox 1972. Firing order on manifold has been ground off ( from auto?). Thanks Jeff
 
"You've probably got a few

"You've probably got a few wires crossed. Try this:

Warm it up and let it idle. Using thick gloves and insulated pliers, pull one wire at a time from the distributor cap. The motor should slow down then pick back up when you put the wire back in. If not that plug is not firing. If you can find two plugs not firing, switch these two wires.

Jeff

PS: Unlike a car engine, with its soft motor mounts, rigidly mounted marine engines don't rock back and forth when they are idling rough. I've had to use a vacuum gage to set the idle adjustments on mine."
 
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