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bayplyer
 
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Default Mercruiser 5.7L stalls on acceleration

Confusing problem. Had a coil short while underway and accelerating.
Would not restart. Was towed in. Tested the coil (lifted the negative
wires and showed short on both posts). The coil was the original (17
years old).

Replaced the coil with OEM part, spent the rest of the day cruising
with no problems. The next day, the throttle release broke and I took
the remote control apart and replaced the broken plastic part and
reassembled. Took the boat out and upon acceleration (climbing past
3000 rpm's) the engine bogged and shut off but this time, it restarted.
Idled around a bit, reved up again, and at around 3000 rpm's, it shut
down. Restarted and idled back into port. Reving the engine out of
gear does not cause the problem, only under a load.

Even though I had the coil problem, since the last thing I was messing
with was the remote control assembly, I highly suspect the something
related (interupter switch on the engine?). I noticed the top cable
was parting at the crimp connection and the cable would pop in and out
of the crimp on movement. Also, the bottom control cable was flopping
on forward/reverse movement of the throttle.

Questions: Is it possible that the bad cables are causing the engine to
shut off at 3000 rpm under load only? Could this problem have
originally killed the old coil? Is it possible to but a meter on the
interupter switch and watch for opens when moving the throttle to full?