DangerMouse
New member
Wondering if anyone can point me in the right direction. I have searched around and can't find a similar problem to this.
I have a 5.7 Mercruiser, with a 2 Barrel Carb TKS, from 2005-06. I have no problem starting, cruising, accelerating etc. But when the engine gets hot, after an hour + of use, when I take it back to idle I will see the RPMs start to go below idle range of 700 and then eventually the engine will cut out 5 secs or so. I have no problem restarting it, but not great when coming into dock.
I thought it was the ignition coil, so have replaced that, but didn't fix it. Carb is recently rebuilt, by previous owner. I sprayed Seafoam in the carb and added to the fuel. Fuel filter doesn't have any water in it. I have tuned the idle mixture by ear, trying to find a place to attach the vacuum gauge (can't find where though?).
My only thinking is this:
1) change spark plugs
2) change water fuel separator filter
3) adjust idle mixture screw (just one on this carb), might be running too rich when hot causing a stall?
4) go into the rest of the ignition electrical system (this feels like chasing the unknown)
Anyone experienced similar to this, or ideas on a fix?
I have a 5.7 Mercruiser, with a 2 Barrel Carb TKS, from 2005-06. I have no problem starting, cruising, accelerating etc. But when the engine gets hot, after an hour + of use, when I take it back to idle I will see the RPMs start to go below idle range of 700 and then eventually the engine will cut out 5 secs or so. I have no problem restarting it, but not great when coming into dock.
I thought it was the ignition coil, so have replaced that, but didn't fix it. Carb is recently rebuilt, by previous owner. I sprayed Seafoam in the carb and added to the fuel. Fuel filter doesn't have any water in it. I have tuned the idle mixture by ear, trying to find a place to attach the vacuum gauge (can't find where though?).
My only thinking is this:
1) change spark plugs
2) change water fuel separator filter
3) adjust idle mixture screw (just one on this carb), might be running too rich when hot causing a stall?
4) go into the rest of the ignition electrical system (this feels like chasing the unknown)
Anyone experienced similar to this, or ideas on a fix?