Super Tigre G61 keeps blowing plugs...

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MWC - 15 Oct 2006 18:11 GMT

My new and not quite run in yet ST61 ring engine is being an absolute
pig-the first couple of tankfulls ran ok, but next time I came to run
it it wouldn't fire. Plug after plug was blowing, the compression is so
low that my 2 year old son can turn it over, there is a nastly 'click'
at TDC and when it does run, it's a lumpy as my wife's porridge........
Are these common problems, or do I have a 'rogue' engine?
And yes, I have follwed the instructions to the letter-correct fule,
plugs etc etc...
TIA
George

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martin - 17 Oct 2006 10:54 GMT

> My new and not quite run in yet ST61 ring engine is being an absolute
> pig-the first couple of tankfulls ran ok, but next time I came to run
[quoted text clipped - 6 lines]
> TIA
> George

Check piston-ring

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Porridgewog SV1k - 20 Oct 2006 21:53 GMT

"martin" <nej@mail.dk> wrote in message

> Check piston-ring

And bearings. Frequently blowing plugs is a symptom of metal debris hitting
the plug. I have no experience of ST engines but with OS 50 heli engines,
if you're blowing plugs then 99.99% of the time your rear main bearing is
starting to disintegrate. So I'd say you are certainly on the brink of a
mechanical catastophe. Don't run the engine again until you have rectified
the cause - otherwise you stand a *very* good chance of wrecking the whole
engine.

Cheers

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olddog - 29 Oct 2006 10:05 GMT

Send it to Uncle Dave , he WILL fix it.

> "martin" <nej@mail.dk> wrote in message
>
[quoted text clipped - 9 lines]
>
> Cheers

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olddog - 03 Nov 2006 10:42 GMT

That should have been Uncle Mike. Mick Wilshire that is.

> Send it to Uncle Dave , he WILL fix it.
>>
[quoted text clipped - 11 lines]
>>
>> Cheers

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Model Forum / Radio Controlled / Air Models / November 2006

Super Tigre G61 keeps blowing plugs...