[taz1]

I have 2 1994 mariner 225 engines one in missing real bad i have swap every part except carbs the other engine still runs fine. Need advice please.

[j_martin]

Pistons, con rods, heads?

Please list what you have tried, and under what circumstances the engine mis-fires.

Have you tried any diagnostic procedures, such as compression check, spark check, fuel pressure?

John

[taz1]

I found the problem,thanks it turned out to be a engine wiring harness problem on the engine cut off circuit.
Thanks LT for the reply taz1