Ok guys I am pulling what is left of my hair out about this issue. I have a 2003 searay with a carburated (mercarb) 4.3 liter GM engine in it. It has always been fussy starting hot it cold. It was laid up for2 seasons and yes the gas was treated before it was winterized. The boat only has 200 hours on it so it is still fairly new.
Here’s the issue. After waking it up from it’s long nap, the engine would not start. It cranks over well (new battery) but no go. Replaced the fuel / water separator with new one and the engine starts and runs normal on the trailer. Launch the boat and it will not start. Towed to dock and removed top of carb to inspect bowl and it looks good but what the heck I took carb off and cleaned it, replaced the float needle and set the float. Put carb back on boat and the engine started so I took the boat out for a good run. Ran fine. Returned to dock and no matter what I tried it would not restart. I have tried to start it and just get a sputter. Kill switch is on, fuel pump runs and has pumps adequate gas into a can when disconnected, accel pump squirts gas when throttle is pumped so there is gas in bowl
why does it run so well one minute and then not. Some thing in the ignition that is marginal? Not consistent
any my ideas would be welcomed
Here’s the issue. After waking it up from it’s long nap, the engine would not start. It cranks over well (new battery) but no go. Replaced the fuel / water separator with new one and the engine starts and runs normal on the trailer. Launch the boat and it will not start. Towed to dock and removed top of carb to inspect bowl and it looks good but what the heck I took carb off and cleaned it, replaced the float needle and set the float. Put carb back on boat and the engine started so I took the boat out for a good run. Ran fine. Returned to dock and no matter what I tried it would not restart. I have tried to start it and just get a sputter. Kill switch is on, fuel pump runs and has pumps adequate gas into a can when disconnected, accel pump squirts gas when throttle is pumped so there is gas in bowl
why does it run so well one minute and then not. Some thing in the ignition that is marginal? Not consistent
any my ideas would be welcomed