I have a 2006 25hp Tohatsu two stroke that randomly loses power at WOT .It’s as if the throttle has been pulled back to 3/4 power .The loss of power lasts only a short period of time then motor surges again maybe for 1minute or 15 minutes.
I took the boat out today for a two hour round trip and this occurred frequently on the outbound trip but improved coming home with it happening only twice in the last half hour.
Before starting the trip I replaced the spark plugs ,had fresh fuel and made sure fuel tank vent was open. The impellor is good as there is plenty of water flow .This problem has only started to happen in the last couple of trips.The motor has heaps of power and the boat jumps onto the plane
I’m going to remove and clean carby as it seems likely it’s a fuel problem .I’ve been told that the fuel pumps are near bullet proof so is unlikely to be the problem
Any feedback on other possible causes appreciated
Regards Kevin
I took the boat out today for a two hour round trip and this occurred frequently on the outbound trip but improved coming home with it happening only twice in the last half hour.
Before starting the trip I replaced the spark plugs ,had fresh fuel and made sure fuel tank vent was open. The impellor is good as there is plenty of water flow .This problem has only started to happen in the last couple of trips.The motor has heaps of power and the boat jumps onto the plane
I’m going to remove and clean carby as it seems likely it’s a fuel problem .I’ve been told that the fuel pumps are near bullet proof so is unlikely to be the problem
Any feedback on other possible causes appreciated
Regards Kevin