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Old 06 January 2022, 14:32   #1
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Yamaha 70beto engine repair mechanic wanted

Hi, as per my messages last year I have the above engine which I'm really struggling with.
I need professional advice as to where to go next. I've changed so many parts ( big thanks to Davie @ David Anderson marine), but the engine is still refusing to cool properly.
If anyone out there can offer a name, telephone number of someone reliable in the Cumbria area I would be ever so grateful.
Thanks in advance, Paul I.
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Old 06 January 2022, 15:22   #2
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I've reread the thread on this. Pictures would have been useful, given the combined knowledge of forum users. You'd be as well stick it on a pallet for someone to work on in their spare time with a budget for parts, given this is probably a labour intensive job to resolve. Whoever gets it will no doubt want to start from scratch anyway, water jacket off, head gasket off, check impeller, compression check, etc.
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Old 06 January 2022, 18:25   #3
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Quote:
Originally Posted by 57paulimo View Post
Hi, as per my messages last year I have the above engine which I'm really struggling with.
I need professional advice as to where to go next. I've changed so many parts ( big thanks to Davie @ David Anderson marine), but the engine is still refusing to cool properly.
If anyone out there can offer a name, telephone number of someone reliable in the Cumbria area I would be ever so grateful.
Thanks in advance, Paul I.
You've been dealing with the best man for the job take a ride up & drop it off or put it on a pallet .afaik theres no one around the lakes or northern England thats particularly good. All the lakes guys have life too easy with all the boats that never go anywhere with wealthy owners willing to pay over the odds for services so they dont like hard work like this.

Sent from my SM-G950F using RIB Net mobile app
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Old 07 January 2022, 04:47   #4
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I've rebuilt that exact engine last summer ,happy to lend an ear
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Old 08 January 2022, 04:43   #5
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If you canny get it sorted by March call me. Got a lot on my plate atm with windfarm jobs and a lorry load of new engines need fitted before I take on anymore + your boat needs water tested so need better weather. Ta
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Old 12 January 2022, 06:52   #6
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Originally Posted by ollyit View Post
I've rebuilt that exact engine last summer ,happy to lend an ear
Thanks for the help guys.
To put it in a nutshell, the engine starts first, second time every time on the key, I'm assuming (perhaps wrongly ) that the engine running is fine, and that the fundamental issue is cooling.
A. Changed impeller, water pump housing and seals below the pump, gaskets also.
B. Inlet jacket off, inspected and put back together with new gaskets.
C. Exhaust manifold off, inspected, put back together with new gaskets.
D. Thermostat out, thermostat in, new thermostat and gaskets.
E. New spark plugs.
F. Fitted hose pipe onto water uptake and ran the engine, still overheating.
I've now got three stripped threads in the exhaust manifold which I'm in the process of repairing, gonna try to measure temperatures at various points with the engine running, but haven't done a compression test yet.
One thing I've not done is to fit an electric drill onto the driveshaft and put muffs on the water intake grills to simulate the engine running as I cant get my (three ) cordless drills to fit the socket I've taped to the top of the driveshaft.
Hope that explains where I'm at.
A despondent Cumbrian (Lancastrian really)!
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Old 12 January 2022, 18:15   #7
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Country: UK - England
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Whittle a short bit of wood down from square one end for socket & round and small enough to fit in the drill chuck on tother.
Thats quick & dirty
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Old 13 January 2022, 11:33   #8
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When you say its overheating... is the alarm going off?
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Old 13 January 2022, 12:54   #9
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Haven't read your original post/thread......Why do you think its overheating?
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Old 14 January 2022, 04:52   #10
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your welcome to give me a call
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