Hi,
I have a Supra Launch SSV from 2001 with Indmar TBI Assault 310.
Today when we were out with the boat we experienced some issues.
First it was hard to start I had to throttle up to get it going. The starter was kind of weak and I blame it on a weak battery after sitting a couple of weeks.
We went out wakeboarding once we got her started but it was running a bit rough especially when trying to get on plane. Once in wakeboarding speed or at idle it was fine.
Then we got some thunder going our way and decided to go back to the dock and wait it out.
We idled back and then suddenly the engine died. It fired back up but now it was running fast idle at about 1200 RPM. Managed to get back to the dock.
Then we went back to the boat to go out again. We brought a new (as in just bought it and charged it up) battery with good voltage.
Now the engine starts fine and idles fine, but if I turn on the blower it will die.
If I turn on a fat sac pump idle speed will drop to about 400 RPM and the engine runs very rough until the ECU (I guess) fixes this by going into high idle at about 1200 RPM.
If I turn on 2 fat sacs pump simultaneously it dies.
Basically as soon as I run any electronics the RPM drops and if I turn on too much the engine stalls.
Voltage is normal and alternator charges the batteries.
I have loosened and cleaned all battery connections (both ends of + and ground wire).
I also noticed that if I try to turn on the bilge the automatic fuse blows. It runs like a second then "click".
Any ideas??
Help please! I am lost!
Ground issue from the dash? But where is the ground?
Mike