Motor Quits when Trim Switch is Used...

[Devilfish]

Well, the subject outlined the original problem. The battery switch was on both, I was idling out of the marina when I tried to trim the engine down. Everything quit as soon as I hit the switch.

Later, I got the engine to refire with #1 batt because #2 would not crank the engine. But the electronics slowly died and would not power back on, even with the engine running when I switched from batt #1 to batt #2 to see what the charging voltage was on that battery. After switching back to #1, they still wouldn't power up with the engine running.

Any ideas on either problem? Looks like a boat-less Memorial Day weekend for me unless I can get this fixed.

 

[CCparker]

need new batteries?

 

[BradV]

check your ground

 

[lorikay2]

I just had the same problem. Thought that it was the power trim relay switch on the motor so I switched that out to find same problem occurring. Ended up tracing all wires back from there and found a 12 inch battery cable that was running from the switch to the battery completely rotten. So after the $300 relay didn’t work, the $7 part fixed it. Well good luck!

 

[Porkchunker]

Battery connectors or cables.

Had the same problem with mine years ago. Traced it to corroded connectors at the battery terminals.

I moved all the wires to large posts on the transom, then used a large gauge wire from the transom to the battery. Problem solved. That stopped the corrosion on all the smaller wires, and made cleaning the large single wires/posts much easier.

I have a thread in the Projects forum on that project.

Dave

aka

 

[Striperswiper]

All of the above and check your altenator to make sure it's charging the batteries.

Should be an easy fix.

 

[TopShot25]

Ground, had the same problem once. I was running at 4200 RPM's and it was just like a kill switch. Hit the trim and the engine stalled. Let go of the switch and the engine ran great. When I slowed down to an idle I hit the trim switch again and it killed the engine. Traced it back and I had a loose ground wire to that engine.

Could be corrosion also, but I agree with above it should be an easy fix.

 

[Devilfish]

Thanks all. I'm going to get to the boat ASAP and check the connections and the condition of the cables.

Probably get a new battery or two as well!