Hey I have a Suzuki DT115 that has started sounding a warning beep and then it cuts the revs back. If I pull the throttle back and idle for a few seconds it resets and runs fine for a bit and then the process repeats..
Some times it happens quickly after each time and other times it might run sweet for 30mins before the warning beep goes off again.
Any ideas on what it could be?? Engine doesn’t appear to be over heating. Oil levels etc are good.. thanks in advance

From how it is going off and on, and that assume the tell tail is working, then suspect 1st thermostat.
 Corroded or more likely jambed up with crap.
 Remove, clean, test opening closing temps in a electric jug and thermometer... Simple process.
Less likely, corroded or bad connection to the heat sensor, or heat sensor has crap build up, needs removing , cleaning up.
Even  further down the list, sensor stuffed.

If crap build up , then would be seriously looking that there are other areas in the engine that have serious salt/ crap build up, and how the engine is getting flushed.

Not sure about suzis thermostats.. in most things tend to be similar to Johnson/ evinrude......the thermostats have 2 temp setting points.

Thanks mate

Pulled the thermostat out and doesn’t look like it’s been changed in a long time. It’s very corroded and the housing also had quite a bit of salt build up. Tried phoning around to get a new one but everyone seems closed until 8 Jan. so might have to wait until then to get a new one.

Have only had the boat 4 weeks and not mechanically minded at all so don’t have a clue and am learning as I go.

Was told it was always flushed with salt away after use but who knows. It’s a 1996/97 engine says it’s done about 350hrs.

Thanks Rockstar from Mars.. I’ll keep that in mind if I can some how get it in to someone to have a look...

Jase83 wrote: Thanks Rockstar from Mars.. I’ll keep that in mind if I can some how get it in to someone to have a look...