500 efi's die together
 

We were out running today for the first time this season and both engines die at the exact same time. We have drive and tab power and cabin dc power, but no power anywhere else. I did have to replace the starter fuse on the satrboard engine this winter. If it blew is there anyway it could make the one on the port engine blow also? There is no power on the dash, or any of the switches on the dash. Could the starboard engine control power to both engines?

Any help would be appreciated.

Problem with the kill switch??????

It is still entact, it did not get pulled I checked that. Now the switch itself could be bad. The engine hatch power is dead also, so I gave up for today. I will have to get the hatch open before I can check anyhting in the engine compartment.

Kill switch will only cut power to the ignition.

Fixx
 

Check the battery switch terminals..probably a bad switch or loose cables..if the switch is melted the cables were probably loose....Replace the switch.

Could this have killed both engines at the same time? I have 2 batteries and 2 switches. I was running both switches on number one at the time.

Fixx
 

go to the one that goes to the engines,,if one switch feeds the other then yes it could kill both engines..you have no power no where so start at the main source and trouble shoot from their..

One switch feeds one engine and the other feeds the other engine.

is the ground connected,,,to both of the switches???

No, sererate grounds from both switches. The engines are grounded together though.

Fixx
 

I doubt they have 2 of everything,2 fuse box's and all..check the battery switches,i bet one feeds both engine power to the ignitions and the other battery switch just feeds the power supply to the starter and so on...is their a battery isolator?

also check all the battery connections,ome may be loose?

Are you close to the Bermuda triangle.

I would check the main engine harness connector on the starboard engine they may have hooked both power feeds to the ignition switches from 1 engine. Un plug it and check for corrosion other than that GROUNDS, GROUNDS AND MORE GROUNDS

It depends on how the switches are wired though...if you have batt #1 wired to switch #1 and then a jumper from switch #1 to switch #2 then when you lost the connection from the battery it could have killed both motors as they both would have been running off of the same battery.....

Now that I think of it Fleg was running 2 yrs ago at the run and he hit a wave and when he landed his battery cable came off it caused a short that fried both his coils...I don't know if this is the same type of issue, but he still had power to everything so doesn't sound like it.

I straight wired the hatch to get it up. There is a circuit breaker on each engine was tripped. I now have both engines where they will start. Now I just have to find out what made them trip. I'm going to replace the battery switch first. That is one of the common links between the engines. The starboard switch runs both ignitions, so if the switch has a bad contact or something that could have tripped the breakers.

Anyone got any idea how the breaker that's on the engine is wired. What does it control. I know when they were tripped, that everything was dead on the helm along with the engines. The battery cables are tight, any ideas what else to check. The engines crank and run good, so it's something that is intermittent. I did have a starter problem, but I replaced it over the winter and it seems to be working fine now. We've also had some other gremlins on that engine, like the tach and oil pressure gauges bouncing up and down. But we have checked all the grounds, and main wiring harness and nothing is loose.