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Member postings for Fatscoleymo

Here is a list of all the postings Fatscoleymo has made in our forums. Click on a thread name to jump to the thread.

Thread: OS 120FS repair - who to use?
01/08/2012 19:08:13

Alan - thanks for your knowledge and advice. I'd better have a good look at the crankcase to make sure I haven't overcooked it. From now on I'll use the oven.

I'm a little confused over how to refit both bearings. If I freeze them will they fit easily(ish) onto the crankshaft and into the front housing?

I can see how using a drilled out dowel allows you to tap them into place with even pressure all around ensuring they are 'square'

Camshaft timing - I believe the little mark on the face of the camshaft should be in line with the center of the cam and the pushrods? And of course I'll have to set the tappet clearances.


01/08/2012 14:20:37

Blowtorch again and off it came.

I've ordered both bearings from Model fixings and now just wait until they come. I'll post again when i put it back together.

Thanks again everyone for your help - I've enjoyed doing this! Never too late to learn.


01/08/2012 10:14:15

Ok - got the crank out - it's the rear bearing (the one on the crank) that's goosed.

Next question - how to get this off the crank? Heat again?

And then how to get the new one on?

The front bearing seems ok, but while I'm at it shouldIi replace that as well?

Another thing - on the piston there is a little inset that i guess is there as a stop for the gudgeon pin. Mine has a little 'return bend' out of the groove - is that how it should be?


01/08/2012 09:39:31

YakMad - thanks,

A minute with the blow torch and it came out easily. smiley

01/08/2012 08:22:40

Hi Guys,

Early start this morning - al lgonet well so far but how do I get the cylinder liner out? I've tried heating the case with a hot air gun but it don't want to budge! I don't think trying to prise it upwards and out through the rear is a good idea.

Any advice please?


31/07/2012 21:55:19

Hi Guys and thanks for the helpful replies.

Adrian - I've watched that OS52 video, and with your encouragement am going to have a go and strip down the motor tomorrow.

Hopefully I'll be able to spot the problem easily. If not I'll be back on here for advice!

Thanks again to all - it's great to have the back up on here to attempt this sort of stuff.

31/07/2012 13:44:42

Hi Guys,

My OS 120 FS Surpass (non pumped) needs looking at. Could be bearing, feels very 'lumpy' .

Just Engines have a month + turnaround at the moment - is there anybody else I could try for a quicker job?

I'm in France - is there anybody who knows of a French repair service?


Thread: Ask..Peter Miller
20/07/2012 11:34:00

Hello Peter,

I'm looking for the plans for Chantilly Lace - have you any idea where i can get a set from?


Thread: OS 120 Surpass FS - should I convert to petrol?
29/10/2011 19:32:35
Hi All - my 1st post.
Just about to start a Balsa USA 1/4 scale cub and want to use my 120 Surpass, ( the one without the pump), and will use my SM services on board glow driver. I've seen the Just Engines site and the CDI ingnition system interests me.
Lower fuel costs, cleaner model, better idle? About £75 to do.
I guess I'll get slightly lower power? (Although in the cub it shouldn't be a problem).
Is it worth the cost and the time fitting?
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