Any old engine buffs on the board?

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Any old engine buffs on the board?

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Hairyloon

Joined: 20 Nov 2008
Posts: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Fri May 16, 14 5:40 pm Post subject: Any old engine buffs on the board?

I was given an old Stuart PX5C engine some time ago and I've recently got around to pulling it out of the shed to have a look at...

But I have not been able to find out much about it anywhere so far and I don't know where to start.

Normally I'd oil it up, throw some petrol at it and see if it will consider firing at all, but the one thing I have found out is that it is a two stroke, and I have no clues to what mix it needs to run.

onemanband

Joined: 26 Dec 2010
Posts: 1473
Location: NCA90

Posted: Fri May 16, 14 6:21 pm Post subject:
A selection of ratios suggested here.

Hairyloon

Joined: 20 Nov 2008
Posts: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Fri May 16, 14 6:31 pm Post subject:
Somewhere between 10:1 and 50:1...

camaro

Joined: 31 Mar 2010
Posts: 178
Location: N. Ireland

Posted: Tue May 20, 14 12:45 pm Post subject:
50:1 with any modern, synthetic oil will be fine - it's not that the engines have changed so much, more that the oils have. My old Seagull was meant to drink 8:1 petrol:engine oil, but sucks down Stihl oil at 50:1 quite happily.

dpack

Joined: 02 Jul 2005
Posts: 45515
Location: yes

Posted: Tue May 20, 14 12:58 pm Post subject:

tis worth seeing if it turns before fueling it ,simple 2 strokes are easy to dismantle, clean and reassemble but if any parts are broken replacements might be available as many such bits were universal use or it might be a write off unless you get a part made.

if it has been stored for a long time it is worth removing the plug to see if the cylinder is dry, oily or rusted solid and checking the electrics are able to give a spark in the right place .

check it for lumps in the fuel lines etc ,a spider in the carb is no fun for either of you

vegplot

Joined: 19 Apr 2007
Posts: 21301
Location: Bethesda, Gwynedd

Posted: Tue May 20, 14 1:53 pm Post subject:

camaro wrote:

50:1 with any modern, synthetic oil will be fine.

What he said.

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