Birdsnest
Well-Known Member
Well I know that this is pretty far off in left field for this forum but I've witness such miracles as such here before.
I have this 4 stroke motor on this(2008) quad that seemed to stop running when it was running hot. The fan was not coming on. In the meantime I have wired a switch to the fan to just run it during use.
When hot it would not idol or run hardly at all and I would let it sit for a while and off it would go and I would just go fast to have lots of air cooling it.
My first thing was to test the thermal fan switch. In a pan of hot oil i found that it switched on a 200f. From what I found on the net, and I could not find much, this was a bit hot so I put in a new temp switch and i tested it and it switched on at 160f so I thought that was it. Nope.
I idled the motor in the yard with the new thermal fan switch in until it got warm and it started running rough again. At this stage I checked the temp on the rad and the block. Both temps were 132f so the motor is not over heating. FYI the over heat light never came on during any of this. I was going to replace it too. Glad I didn't.
So the question is what is causing this rough running at the not too hot running temp. It coughs and sputters and has no power and backfires. I was told by one professional that it could be a coil failing at the temp of 132f.
Thoughts?
I have this 4 stroke motor on this(2008) quad that seemed to stop running when it was running hot. The fan was not coming on. In the meantime I have wired a switch to the fan to just run it during use.
When hot it would not idol or run hardly at all and I would let it sit for a while and off it would go and I would just go fast to have lots of air cooling it.
My first thing was to test the thermal fan switch. In a pan of hot oil i found that it switched on a 200f. From what I found on the net, and I could not find much, this was a bit hot so I put in a new temp switch and i tested it and it switched on at 160f so I thought that was it. Nope.
I idled the motor in the yard with the new thermal fan switch in until it got warm and it started running rough again. At this stage I checked the temp on the rad and the block. Both temps were 132f so the motor is not over heating. FYI the over heat light never came on during any of this. I was going to replace it too. Glad I didn't.
So the question is what is causing this rough running at the not too hot running temp. It coughs and sputters and has no power and backfires. I was told by one professional that it could be a coil failing at the temp of 132f.
Thoughts?