Hey Everyone,

I've got a 3 litre Mercruiser built in 1999 with only about 30
hrs.(salt and freshwater) on the engine. Motor starts and idles fine
in low and high rpm. Under a load at high rpm's the engine will cut
out (similar to a kill switch). The fuse to the ignition (15 amp)
usually blows and the engine won't restart until a cooling off period
of about 2 hours. If anyone has ever experienced anything like this
or has heard of this happening I'd like some ideas as to why. Thanks
in advance, Sean

Ignition module or coil I'd guess.
"Sean" wrote in message
om...
Hey Everyone,

I've got a 3 litre Mercruiser built in 1999 with only about 30
hrs.(salt and freshwater) on the engine. Motor starts and idles fine
in low and high rpm. Under a load at high rpm's the engine will cut
out (similar to a kill switch). The fuse to the ignition (15 amp)
usually blows and the engine won't restart until a cooling off period
of about 2 hours. If anyone has ever experienced anything like this
or has heard of this happening I'd like some ideas as to why. Thanks
in advance, Sean

Thanks for the insight. I did replace the ignition module last week
and the wiring harness that runs to it as well. Starts and idles
fine; haven't had the opportunity to get it out and run it yet.
Thanks again, Sean

I'm still having the same problem. I've swapped out the coil, the
module and the ignition switch and still the same result. Very
frustrating. Any other suggestions would be appreciated. Thanks,
Sean

(Sean) wrote in message . com...
I'm still having the same problem. I've swapped out the coil, the
module and the ignition switch and still the same result. Very
frustrating. Any other suggestions would be appreciated. Thanks,
Sean


15amp ignition fuse seems a little lite. check that the main harness
plug at the engine is plugged in correctly, remove it and add
dielectric as well.
if that doesnt work do some basic tests, compression, spark, fuel
pressure etc.
do these while the fault is present.

Check for voltage with a meter when you have whatever problem you have.
Make sure there is 9.6-12V at the (+) side of the coil of the power to the
ignition module.
Bill

"BenC" wrote in message
om...
(Sean) wrote in message
. com...
I'm still having the same problem. I've swapped out the coil, the
module and the ignition switch and still the same result. Very
frustrating. Any other suggestions would be appreciated. Thanks,
Sean


15amp ignition fuse seems a little lite. check that the main harness
plug at the engine is plugged in correctly, remove it and add
dielectric as well.
if that doesnt work do some basic tests, compression, spark, fuel
pressure etc.
do these while the fault is present.