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Old 17 June 2006, 05:21   #11
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I bought the engine I think about a year and a half ago and that was when it was last run. She was run in the tank a fairweather marine, so I guess not salt water but probably far from ideal. I can't remember if the impellor was changed before I bought it or not.

I'll have a poke with some wire and see what happens.

Tim
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Old 17 June 2006, 10:22   #12
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Tim, did you see the pictures in my thread
How old is this engine?

I found little bits of rubber and salt crystals blocking up most holes in my water jacket.
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Old 18 June 2006, 06:11   #13
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If youve got salt crystals in there then you should get into the habbit of flushing it out.
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Old 18 June 2006, 06:16   #14
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thanks for the replies guys.

Mr-d, i'll check out your thread. The engine is a '96 model so not quite as old as yours!

zodiac rover. I always wash my engines out after use, its just that this one is new to me so I don't know how well its been washed out before.

Yesterday I found some strimmer wire and poked it up the tell tail. felt some resistance and then a load of water came out. Ran the motor again and there was more water coming out, but not as much as I would expect. Went to ask my local tohatsu engineers and they said there probably isn't supposed to be that much coming out anyway so I reckon its fine. Just needs a real good blast in the solent.

Thanks for all your help.

Tim
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Old 18 June 2006, 12:34   #15
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We had the same problem with our engine when we first got it as it had been stood for sometime and a guess that all the salt had not been cleaned out when it was flushed.

i found that the telltail hole would block up a few times, but once cleared a few times it was OK. its useful if you can get the telltail off so you can remove as forcing it back may mean it ends up blocking again.
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Old 18 June 2006, 13:24   #16
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Originally Posted by Jimbob
We had the same problem with our engine when we first got it as it had been stood for sometime and a guess that all the salt had not been cleaned out when it was flushed.

i found that the telltail hole would block up a few times, but once cleared a few times it was OK. its useful if you can get the telltail off so you can remove as forcing it back may mean it ends up blocking again.
If your take-off for the telltale is on the bottom of the block then backflush it with water for a bit longer and you'll see a load of crap come out of the prop centre with the water.
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Old 21 June 2006, 16:48   #17
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my telltale is fine when being flushed with a little poking,but lasts about 5 mins in the solent before blocking again, the hole is not large and the smallest peice of crap blocks it, anyone know the effects of drilling the hole out a little?
last time i flushed it,it appeared lumpy, as if it had cyrstals in, and it has been suggested that it may have a build up from the previous owner, it is also warm/hot and i always back flush it first.
not that realy helps you....
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Old 21 June 2006, 17:56   #18
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Dont know about the suzis but the telltale on the yam is allways cold.
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Old 21 June 2006, 18:22   #19
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Had my local mechanic round today. Top bloke.

anyway, he reckons my engine is overheating slightly. First thing for me to do is take the thermostat out and check it in some hot/cold water. If thats ok, then I got to check the water pump (apparently old tohatsu 70s may have had a problem with their pump and housing which meant they needed replacing every year).

There is plenty of water coming out of the lower cooling water exits just above the ventilation plate which I'm hoping suggests the water pump is working ok as it has to pump the water up the leg and then let it come back down again before coming out of this hole. I reckon the thermostat might be stuck resulting in the cooling water bypassing the block and pissing out the bottom which I guess would explain why my tell tail is weak and why it is overheating.
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Old 23 June 2006, 03:30   #20
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success

Last night I took the thermostat out and tested it in hot water. All seemed to be working ok. In the thermostat housing there seemed to be a fair amount of salt and sand so cleaned all that out and gave the thermostat a good scrub.

Thinking that this wouldn't make much difference, I connected it all back up and ran the engine again and the tell tail had even less water coming out of it! Took the small pipe off the tell tail and found it was semi blocked with sand. Fired a hose through it and re-ran the engine with the pipe sticking straight out of the cowling, bypassing the tell tail outlet. With the pipe now connected to the tell tail outlet I get a good stream of water and the block doesn't get nearly as hot.

All I need to do now is adjust the mix and idle screws on the carbs.
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