So Im pretty sure my engine has a 140 degree t-stat in it because it usually sits right at 145-150. A couple weeks ago I noticed that after running it for a while it was creeping up to 160 or so but would come down if I let off the throttle for a sec.
I just bought the boat the end of June and the PO said (and gave me the marina receipt) that the impeller was changed in March. When I saw the temp getting up to 160 sometimes I changed the impeller just for peace of mind. The impeller looked good and wasnt broken and didnt have cracks or anything but the fins were laid over pretty good. So I changed it and then the boat would stay at about 110 idling at the dock until I got out and ran it. then it would stay around 145-150.
So today I got to the boat. I start it and let it warm up while I go get some stuff from my car. 10 mins or so later I come back to the boat and the temp is 175-180. I hurry and shut it off and let it cool down a few. I started it back up and the supply hose into the t-stat housing was tight (had pressure). the big hose to the circ pump was not. I could tell it had no water in it.
I took the t-stat housing off and there was no debris in it. I put the housing back on and took the supply hose off while I started the engine. Water flowed good. Put it back on and about 30 seconds later the big hose to the circ pump got pressure again and the temp stayed normal.
So would a sticking t-stat cause this? Pretty sure Im not seeing it right but I dont even see how the t-stat works in that housing because its at the top of the housing and the supply hose is lower than it so when it is open water will still circulate. I dunno, but I think this may happen again as I didnt find a cause for it. I checked the impeller after this and is still looks new.
Anything I should check? If this really sounds like a t-stat issue Ill just go get a new one. The t-stat is new when I got the engine about 2 months ago.
I should be ok as the engine only got to 180 max right? It does still run great and didnt notice anything abnormal.
I just bought the boat the end of June and the PO said (and gave me the marina receipt) that the impeller was changed in March. When I saw the temp getting up to 160 sometimes I changed the impeller just for peace of mind. The impeller looked good and wasnt broken and didnt have cracks or anything but the fins were laid over pretty good. So I changed it and then the boat would stay at about 110 idling at the dock until I got out and ran it. then it would stay around 145-150.
So today I got to the boat. I start it and let it warm up while I go get some stuff from my car. 10 mins or so later I come back to the boat and the temp is 175-180. I hurry and shut it off and let it cool down a few. I started it back up and the supply hose into the t-stat housing was tight (had pressure). the big hose to the circ pump was not. I could tell it had no water in it.
I took the t-stat housing off and there was no debris in it. I put the housing back on and took the supply hose off while I started the engine. Water flowed good. Put it back on and about 30 seconds later the big hose to the circ pump got pressure again and the temp stayed normal.
So would a sticking t-stat cause this? Pretty sure Im not seeing it right but I dont even see how the t-stat works in that housing because its at the top of the housing and the supply hose is lower than it so when it is open water will still circulate. I dunno, but I think this may happen again as I didnt find a cause for it. I checked the impeller after this and is still looks new.
Anything I should check? If this really sounds like a t-stat issue Ill just go get a new one. The t-stat is new when I got the engine about 2 months ago.
I should be ok as the engine only got to 180 max right? It does still run great and didnt notice anything abnormal.
