Twin Crusader 220hp interaction

[norm1607]

If I start my Starboard engine first and then my Port, the Starboard engine will stop. Doesn't happen vice versa if Port engine is started first. Has anybody got any ideas?

[S/V Antares]

Sounds like you are using the same battery to start both engines. The starter load on the Port engine is more and drops the voltage causing the Stb engine to stop.

[capn_billl]

Check the grounds, on the engines, starters, batts etc...

My engine grounds were daisy chained.

[David M]

You may have a weak battery, corroded terminal or undersized wire causing a voltage drop severe enough to where the engine electronics do not have enough voltage to function properly while the starter motor is cranking. I would first check all your electrical terminals on your port engine. Chances are your wire was gauged correctly, especially if you used to be able to start your starboard engine first. There is a lesser chance it is an old battery, since you can start your port engine first and have your port engine remain running when you start your starboard engine.

From what you describe, the problem appears to be on the port engine, causing too much of a voltage drop. You should be able to start both engines with a single battery. This is fine for a twin engine boat. Just in case someone misunderstands me, I am not saying starting both engines simultaneously, which of course you never want to do.

[norm1607]

Many thanks, will check all cables and earths and see if it solves the problem.