Overheating on 2000 SAN

[Watty]

My wife was nice enough to leave my engine running up the ramp after a long hard day on the water and I have been experiencing overheating problems since then. I ended up replacing my impeller and noticed the old one was just fine without any missing fins or scarring. The engine is still overheating even after the replacment but the water is coming out of the exhaust like it should when I run the hose to it through my fake a lake intake in my driveway. I checked all of the hoses from the intake, to the cooler, to the RWP, etc. and nothing is blocked, torn, etc. The only thing I have not checked is my thermostat because it does not make sense that this would be the issue. I am planning to order a new one and replace the old one either way though. I am also wondering if my Raw Water Pump is going bad because that seems a likely suspect since I have close to 1000 hrs. on my ride. Can anyone on this site think of any other reson why this problem will not go away. I am getting fatigued here in AZ from working on my boat in the blazing sun during the summer and I just want to get back on the water. Any thoughts or suggestions are appreciated.

[Watty]

RE: Overheating on 2000 SAN

I forgot to mention that I have checked my straiiner and seal and everything there is good as well. The RWP is also on in the correct direction with the screw facing the inside as well.

[Watty]

RE: Overheating on 2000 SAN

Update - I pulled my thermostat and it appears to be bad based upon my testing so I bought a new one and will drop it in tomorrow and see if this fixes the problem.

[bchesley]

RE: Overheating on 2000 SAN

Glad we could help.............

[WakeSlayer]

RE: Overheating on 2000 SAN

Don't let your wife see that first post! You'll end up landscaping in the blazing sun. Or boating alone.

[AirTool]

RE: Overheating on 2000 SAN

The only thing I have not checked is my thermostat because it does not make sense that this would be the issue.

Your statement doesn't make sense....the t-stat changes the flow rate through the block...but not through the entire system. The full flow of cold water is still needed to cool the exhaust.

I'll bet your problem is solved.

My wife was nice enough to leave my engine running up the ramp

And you should be thankful your wife can drive the boat and even put it on the trailer.

[Watty]

The wife feels like she killed the boat so no worries there. She will be happy if I fixed it myself to save us some money :grin:

I feel it is the thermostat it just didn't make sense to me why it died (stayed closed) from this incident. Maybe it was its time to go either way but it was the last thing I checked which sucks.

I will provide the update tomorrow once I throw the new one in there and test it in the driveway. Getting the old gasket off took me a long time without the right tools but brake fluid and a razor blade finally did the trick.

[Watty]

Glad to report it was the thermostat and it was great getting back on the water today and enjoying this unheard of 90f weather in June in AZ.

[TravisFling]

I'll second that you're lucky to have one drive the boat up the ramp in the first place... Not to dig too hard, but who taught her how to load the boat on the trailer?

[Watty]

I taught her how to do it. She is a decent driver, loves the perfect pass, and gets a little jumpy if other boats are around when driving with riders in tow. I am the only one that can back in the trailer so she had to learn how to do it. I am a guy that likes to spend 1 minute at most on the ramp so we just developed a system that works for both of us as a team. I just have her take it slow, I stand by the front of the trailer and give her hand signals to let her know what direction she needs to go to line up straight on the trailer. Once she has passed the guidepoles, she puts it in neutral so we make sure the boat is centered on the trailer, then she gives it a little gas to get the boat further up the trailer while I guide the bow to make sure it centers on the front of the trailer. We have been boating together for years and she found it a lot easier on our old IO since she had better steering at slow speeds but has learned on the SAN and is comfortable doing it now. We make a good team and I make sure I never yell at her even if she has to back up due to wind or some drunk driver next to us. I took some time to learn but we are on/off the trailer in 30 seconds so we like it a lot better this way.

I also ask her if she has turned the boat off before I drive up the ramp now as an extra step after this last time. She had some beers in her so I understand the mistake and she felt terrible about it so no big deal there either. I once again did not give her a hard time but explained what can happen and she will likely not make the same mistake again. It doesn't help either when we have the FAE now along with Wetsounds and a sub that is loud that probably helped in her in not realizing the engine was even on.