shut down on throtle

[neri11]

hello have a 75 105 chrysler, idles good , starts no problem, at upper load, rpm, engine cuts of and on for just a sec , shuts off and on cleanly no warning , runs good if you slow down, last year did it at full throttle, this year does it at 3/4, feels like spark just shuts off , thanks for any help

 

[tommarvin]

It's not broken enough to risk fixing it during boating season.
At the end of boating season, clean the carbs with spray cleaner and compressed air.
You could check every inch of wire for bare, broken, loose, pull all wires that go into connectors.

 

[Nordin]

Sounds like there is a insulation some where.
Take a close look at the wireharness that goes from terminalstripe over the engineblock under the flywheel to the CD module.
The flywheel may touches the wires and insulate it.

 

[GA_Boater]

It's not broken enough to risk fixing it during boating season.
At the end of boating season, clean the carbs with spray cleaner and compressed air.
You could check every inch of wire for bare, broken, loose, pull all wires that go into connectors.

It certainly is broken enough to fix during boating season. From the the OP's description, the problem is getting worse and if the motor does the off and off thing while passengers are moving around, they could be thrown around or worse, thrown out of the boat. Also, if it motor hiccups in the wrong situation, it could lead to a collision.

This needs to be fixed for your, your passengers and fellow boaters safety.

These types of problems are difficult to diagnose over the InterWeb, but wiring does seem to be a suspect. It could be anything from a kill switch or failing key switch and anything from the remotes through to the wiring under the cowling. It may be something else entirely, but wiring and electrical are prime suspects.