overheated my kicker

[coolbri70]

I have an evinrude 9.9 with the 15 carb, I replaced the impeller and was going to test it at the river today, but there was too much junk in the water so I brought it home and ran it in the bucket the tell tale was squirting good so I left it run a little while. then I thought to take off the cowl for a look and noticed the paint burned off the top cylinder, I felt it was very hot:faint2: so I shut it down. thinking it could be the thermostat, I removed it and tried again, the motor didn't get hot so I assume the thermostat is bad, hope I didn't destroy my motor:facepalm:, compression tester will tell, but its at work and they're closed till Monday. any other advice

 

[bonzoscott]

Re: overheated my kicker

Test that thermostat on the kitchen stove and use a turkey thermometer. Gauge exactly what temperature it opens at. That'll give you a basis.

 

[coolbri70]

Re: overheated my kicker

here is a video of it running after removing the thermostat the housing is leaking, I think the heat flattened the gasket

should there be water coming out the hole beneath the lower cowling my big motor shoots water from there when the stats open

 

[oldboat1]

Re: overheated my kicker

sorry to hear about the issues. It sure looks like the motor is running cool now, if you can hold you finger on the face of the head next to the plug that long! Think you are probably right about the t.stat. If it's leaking up there a little now with the thermostat removed, it might be just that you didn't torque the bolts in the cap quite tight enough. One thing you might do before compression testing -- maybe tighten the head bolts just a bit if they are a little loose from the heating and contracting.

 

[boobie]

Re: overheated my kicker

Get a bigger bucket and get it deeper in the water.

 

[coolbri70]

Re: overheated my kicker

sorry to hear about the issues. It sure looks like the motor is running cool now, if you can hold you finger on the face of the head next to the plug that long! Think you are probably right about the t.stat. If it's leaking up there a little now with the thermostat removed, it might be just that you didn't torque the bolts in the cap quite tight enough. One thing you might do before compression testing -- maybe tighten the head bolts just a bit if they are a little loose from the heating and contracting.

I will have to bring home my torque wrench Monday, its at work, any one know the recommended torque for the head bolts?

 

[coolbri70]

Re: overheated my kicker

Get a bigger bucket and get it deeper in the water.

the bucket is plenty deep, the motor is too high above the ground, I need to put more blocks under the bucket to raise it to the motor

 

[boobie]

Re: overheated my kicker

The water pump has to be submerged in the water to pump properly.

 

[oldboat1]

Re: overheated my kicker

with a model number, you might be able to find the headbolt torque specs online, but post the number and somebody will undoubtedly come up with an answer. (retightening may be more of a feel good thing, actually -- I do that after reinstalling a head and running the engine, but that's different I guess. Still, it's the same concept...). Should operate with a working t.stat, and you are probably working on that.

(agree with what Boobie says about depth. has to be well above the impeller -- probably a rule of thumb for that. maybe four or five inches? I probably sink it deeper than it needs to be, but figure the water is a little less likely to overheat from the exhaust that way as well.)

 

[coolbri70]

Re: overheated my kicker

the model E10RERB, and I think its a Vernatherm looks like Vernatherm for Johnson, Evinrude 394411 - Sierra 18-1506 - iboats I put it in a pan and heated it the meat thermometer read 200 a rolling boil and it did nothing, I'm guessing the tip is supposed to pop out:noidea: at what temp? I know it shouldn't boil. does iboats sell the gasket? should I replace the other parts? springs, rubber pieces, etc. does iboats sell them? I can't find

 

[oldboat1]

Re: overheated my kicker

vernatherm (t.stat) will come in a kit -- should have a gasket with it, but the thermostat itself is complete. I would just replace it. When working, you will see the spring moving when it opens and closes (not very subtle). You should be able to test it with hot tap water (about 120 or 130 degrees -- which is about the point where you want to pull out your hand). sounds like it wasn't doing anything for you.

 

[coolbri70]

Re: overheated my kicker

they only list a thermostat kit from 1974 to 1986, mine is a 1994. they have a vernatherm listed for 1993-1995 and it looks like the thing I have. only there are other parts I cant find on iboats. I found them else where online the gasket, springs, a cup, rubber rings, even the housing. do I need to replace that stuff too? can I get them here at iboats. I cant find them here

 

[coolbri70]

Re: overheated my kicker

in this pic number 19 is the vernatherm, anyone know if I should replace, 8,28,46,45,42,41,33,or 43 also

 

[oldboat1]

Re: overheated my kicker

afraid I can't quite read the blow up, but yes -- need the whole assembly one way or the other. I would have in mind a kit that would include the whole v.therm assembly and the gasket for the cap. The last one I bought was for a '90 9.9 a long time ago. I think it was a Sierra aftermarket kit, but it could have been from a dealer available locally at the time -- aftermarket kit would have been through NAPA.

Sorry I can't be more help. Suggest you try a dealer if you have one there, or a NAPA outlet (probably have a Marine catalogue you can use, and advice from the parts person. Take the old thermostat assembly with you, incl the gasket for the cap.)

Note: See your point. I did an online search (same blowup you are showing), and the v.therm is apparently sold by itself -- no kit. So if it were me, I would try to replace just the vernatherm itself and use the parts you have that go with it. If in doubt about any parts in the assembly, replace that part. You should be able to reuse the spring, for example, but replace any gaskets. See if you can reuse virtually everything except the v.therm itself. Interesting.

 

[coolbri70]

Re: overheated my kicker

I was thinking the gasket 28 and the vernatherm 19 and re use the rest:noidea:

 

[oldboat1]

Re: overheated my kicker

sounds like a plan, coolbri. Reuse what you are comfortable with, and just replace the rest. If in doubt, replace it. All good.

 

[twocyclemania]

Re: overheated my kicker

Outboards can take a beating. My 84 Johnson 7.5 had a thermostat go and by the time I noticed I thought the motor was on fire. It was smoking and it even melted the plastic throttle cable holder that's on top of the head. When it was cool enough to handle I removed the thermostat and went on my way. It's run well ever since. Just an fyi. I wouldn't worry until and if the motor tells you otherwise.

 

[coolbri70]

Re: overheated my kicker

most of the pieces look ok, but the vernatherm isn't working and the gasket is leaking so i'll replace them. I would like to order from iboats but I cant find the gasket and I'm not placing multiple orders, so guess I have to order elsewhere:noidea: before I order parts I want to do a compression test to make sure I don't need more parts

 

[coolbri70]

Re: overheated my kicker

going to bring my compression tester home from work today. can I just pull off the kill switch to ground the plugs during testing??

 

[coolbri70]

Re: overheated my kicker

I got exactly 100 psi top and bottom, at least they are the same, now I need to know what it's supposed to be