fishing111
04-03-2011, 08:50 PM
Hi there, anybody got any ideas as to why a white Suzuki 115 4 stroke would keep stalling at 700-1000 RPM, and less occasionally at higher revs? It has been doing it periodically now for quite some time which is pissing me off big time as I have to keep continually checking the bulb is hard when trolling close to land and driving boat on trailer. The motor has also stopped at higher revs, surging until it dies, but usually it is at just above idle.
When the motor stalls at low revs it sputters and vibrates until it stops, and then I have to pump the bulb to hard and then its right again for the next 10 - 20 minutes. I am thinking that maybe it is something to do with the humidity, or possibly the fuel pump, or vapour lock of some sort but don't really have a clue. The motor has just had its 100 hour service and I told the mechanic but he said nothing showed up on the print-out. I have changed the primer bulb over, and thought that cured it until the problem resurfaced recently. I always use fresh fuel and there has been a Racor fitted since new, and the vent is incorporated into the Perko fuel lid, and is not blocked. To my way of thinking its fuel starvation of some sort, similar to when you forget to undo the vent on a portable, yet it happens periodically at higher revs and all the time at idle, so I don't know.
Cheers for any ideas.
When the motor stalls at low revs it sputters and vibrates until it stops, and then I have to pump the bulb to hard and then its right again for the next 10 - 20 minutes. I am thinking that maybe it is something to do with the humidity, or possibly the fuel pump, or vapour lock of some sort but don't really have a clue. The motor has just had its 100 hour service and I told the mechanic but he said nothing showed up on the print-out. I have changed the primer bulb over, and thought that cured it until the problem resurfaced recently. I always use fresh fuel and there has been a Racor fitted since new, and the vent is incorporated into the Perko fuel lid, and is not blocked. To my way of thinking its fuel starvation of some sort, similar to when you forget to undo the vent on a portable, yet it happens periodically at higher revs and all the time at idle, so I don't know.
Cheers for any ideas.