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Old 21 November 2009, 17:46   #1
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Engine overheated whilst flushing..advice?

Help! I left my Tohatsu 9.8 flushing and went off to do something. When I got back the water hose had popped off so the engine ran dry, overheated and stopped.

I plugged in the hose again and started it up again. There was some steam but it did carry on ok.

Question: have I done any serious damage to the engine that a standard service would'nt sort out?

Thanks
Flyguy
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Old 22 November 2009, 02:32   #2
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Compression test it too.
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Old 22 November 2009, 03:59   #3
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Quote:
Originally Posted by Flyguy View Post

Question: have I done any serious damage to the engine that a standard service would'nt sort out?

Thanks
Flyguy
If it got hot enough to sieze which it must of done if the engine stopped then you probably have done some damage. However like Nos Said a compression test will at least let you know if its terminal or you have just reduced the life of the engine by a few years
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Old 22 November 2009, 07:32   #4
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how much revs did you have on it ,,if it was only on tick over or just above it might just have got a bit hot and stopped with not much detrimental damage ,is it 2 or 4 stroke,
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Old 22 November 2009, 07:40   #5
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yOU WON'T BE DOING THAT AGAIN?

You might just get away with it if either way theres noting in a routine service that wil cure overheating problem.

Fortunately the Toohotsu's aren't built to the closest tolerances of all outboards and this comes in handy if you've abused the engine. You will have had an effect but it probably won't be too bad


The impellor will have been damaged and needs replacing, thats a simple DIY job.

Also look to see if any plastic fittings on the engines have been melted

If you have done any damage then the compression testing will tell you, if you can't do it any garage can. As Chris says you might have taken a bit off the longevity of the engine.

Did the engine start as soon as you pulled it?
How soon after the discovery of stopped engine did you restart?
Hopefully it's A 2 stroke?
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Old 22 November 2009, 13:25   #6
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Terrible mistake, you should never, ever leave a unattended engine on while flushing, stupid issues as commented can happen and will sure happen at any time.

Really nothing to worry about, check:

1-Impeller, probably halfway melted on water pump insides, check/change.
2-Check plugs, if contaminated with water, change head gasket, probably burned out.
3-If plugs ok, torque head gasket to specs.
4-Check plastics, electrical cables, melt downs inside cowl, replace/repair whatever.

In the past had 4 engines overheats at full throttle, engine stopped inmediately, smoked like a train, some plastic wires were melted along with impeller, head gasket was deformed, but no problem at all with compression issues, changed all related parts and again we went, overheating engine at idle speed is the least of mayor overheating problems.

Happy Sibbing
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Old 01 December 2009, 17:46   #7
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Thanks guys. Yes its a 2-stroke and was just ticking over on low revs. It did start after a couple of pulls.

I will get it booked into the dealer for a full service and compression test. Fingers crossed!
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Old 01 December 2009, 18:01   #8
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Thanks guys. Yes its a 2-stroke and was just ticking over on low revs. It did start after a couple of pulls.

I will get it booked into the dealer for a full service and compression test. Fingers crossed!
don't tell him it's overheated, if he's any good he'll spot it! but if you tell him you may well be milked, perish the thought
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Old 02 December 2009, 03:22   #9
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don't tell him it's overheated, if he's any good he'll spot it! but if you tell him you may well be milked, perish the thought
i think the brownish gold colour instead of green might give it away, you can't do anything about it now except a strip down, i would use it for a while to see if anything starts knocking
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Old 22 February 2010, 15:45   #10
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Just an up date. No real damage and a standard service fixed everything
I love my Tohatsu!
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