Trojan Boat Forum

For a month I have been trying to find a miss in a 233 MerCruiser on a 76 trojan express. I have drained the fuel tank, changed the fuel filter,rebuilt the carb. rebuilt the fuel pump and I still had a cutting out above 3400 rpm's.About 3 years ago I put a electronic conversion kit in the orginial distributor and the boat ran fine. I was told to check the voltage and I found out that I had 10.7 volts going to the coil. I had kept the orginial points and condensor so I took them to the lake today and installed them and the boat stopped cutting out above 3400 rpm's. Now my question is why the low voltage and where do I start?
Any input would be appreciated!!

bad wire is easiest check - seen that befoee. The ignition circuits can cause problems - and your Mercathode (have 1?) could be an issue.

I've seen people run a wire (through a fuse or breaker and a switch) drecttly from the battery (or a power panel), but this doesn;t meet USCG code.

In a points and condensor setup quite often the coil is resisted and requires a lower voltage to operate. When changing to an electronic ignition system it is normal to feed the coil with switched 12 volts as the resistor has been removed. British cars install the resistor in the harness and the wire must therefore be bypassed. Probably not the case for you but itwould bear investigation.
K