Both motors overheating during dewinterization

[vxooxv]

In the process of changing oil as part of dewinterizing. I’ve never had either motor over heat and my lakehouse is on a well with decent water pressure.

Both motors basically tripped the middle alarm (solid red light, no sound) which I believe is temp. Both at idle after after about 3-5 min. One dribbles pee and the other steams.

Could it be burning off the fog?

if it was one motor I might be concerned but it’s both, or maybe that means I should be more concerned.

 

[tdonoughue]

Odd that it is both engines. But the fact that there is a stream difference from one to the other hints to me that you have something blocked somewhere.

Do you have water coming out of the jets in the back on both engines? About the same or more with one than the other?

 

[buckbuck]

I suggest you do just one at a time and clamp off the cooling line so the water does not just go backwards out the intake screen. Remember to pull the clamp when done.

 

[vxooxv]

I am doing one at a time.

starboard- hook up hose, start motor quickly turn on water... turn off water then quickly turn off motor. Change Oil.

Repeat on both sides.

Just checking again.

Port side seemed to mostly come out of white hole above jet and the side. Didn’t trip alarm the second time. I think hose had a kink.

Starboard comes from side and actual jet. Nothing from the white hole up top. It tripped alarm again.

 

[vxooxv]

I tape all the holes and intake grate in the winter so nothing should have got in.

 

[vxooxv]

Not sure what to clamp where / why etc

 

[vxooxv]

Any suggestions? Someone was actually saying I might be able to back it in water and with more water it might solve the issue. I just think it’s alarming that nothing is coming from thermostat pee hole.

 

[tdonoughue]

Ok, even more concerning that you don't have good pee flow, and that you covered all the holes in the off season.

Still, the lack of pee flow indicates you most likely have some blockage somewhere. I think I would start with the trimmer line through the pee hole, then down the flush port and anywhere else that might have water associated with it to see if you can find something. I know that isn't much in the way of advice, but I think that is what I would do next...

 

[Julian]

If the hose had a kink....that would do it.

I'd put her in the water and see how she runs.

 

[WREKS]

Any suggestions? Someone was actually saying I might be able to back it in water and with more water it might solve the issue. I just think it’s alarming that nothing is coming from thermostat pee hole.

The thermostat should have opened after running a few minutes.

 

[crazy4life]

If the hose had a kink....that would do it.

I'd put her in the water and see how she runs.

^^^^^^I would try what he said. I get no water out of pissers on the hose but on the water no prob.^^^^^

 

[vxooxv]

If the hose had a kink....that would do it.

I'd put her in the water and see how she runs.

Hose only had kink on the port side; which stopped overheating. The starboard side, however, seems to overheat (on the hose) after a few min at idle. I suppose the thermostat should open and allow to pee through the thermostat pee hole in the rear right?

 

[WREKS]

Do you ever boat in shallow waters or beach your boat? If yes, you may have an internal blockage. Do you have an infrared thermometer. If you do, shine on the area on the exhaust side near the cylinder head and the valve cover. Maybe you can narrow it down to a particular area.

 

[vxooxv]

Do you ever boat in shallow waters or beach your boat? If yes, you may have an internal blockage. Do you have an infrared thermometer. If you do, shine on the area on the exhaust side near the cylinder head and the valve cover. Maybe you can narrow it down to a particular area.

I do however, I had no issue before winterizing and it hasn't been on the water yet. I can only assume that since the one motor isn't peeing out the rear thermostat pee hole above the jet pump that either a. that hose has a block or b. the thermostat isn't opening allowing water through? I think.... but i'm really not sure. I can't find a writeup on how to change a thermostat on these boats so again, i'm only assuming here.

 

[WREKS]

This is Starboard right? Is any water dripping out of white hole?

 

[Scottintexas]

have you watched buckbuck's video about cooling water flow in the FAQ ??

If you're near the ramp I'd run it in the water just to get a better idea,

this is from 2005 but it should be the same for your boat,
the thermostat is on the rear starboard side of the engine up high,

 

[Babin Farms]

Try tapping on the thermostat housing with the handle of a screwdriver while your running water through the engine and it's up to temp. Sometimes it just needs a tap to free itself. Just tap, don't beat the hell out of it.

 

[vxooxv]

This is Starboard right? Is any water dripping out of white hole?

Yes, starboard side. Not via the hose. All comes out the exhaust and jet housing itself. Whereas Port side comes out of white hole + exhaust and less jet housing.

I plan on backing it in the water tomorrow and running it. I won't be able to tell if it's coming out of the white hole BUT I can try and tap the housing and see if it continues to overheat.

 

[Scottintexas]

I'd bring an infrared thermometer and run the good engine first for 5 minutes to establish some sort of base line at 2-3 different spots

 

[WREKS]

You could try removing the thermostat-2 bolts #6 on the diagram Scott posted. Just drape a dry towel over the opening. If you run the motor on the hose for 10 seconds and the towel stays dry, there is no cooling water getting to the thermostat. In that case the thermostat is probably good and the problem is upstream. You should have a good stream of water as you saw on the portside.