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Buzzacot Farm Pumper Rebuild

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Old 05-11-2018, 05:06:43 PM
Scotty 2 Scotty 2 is offline
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Default Re: Buzzacot Farm Pumper Rebuild

Hello Mr Muzz
By winding the rod up making the exhaust open early, you also let the valve close later which means lower compression doesn't it?
It could be a weak spark. Can you check to see if the spark jumps about 5 or 6mm?
On our engine with the Wico, we had spark but I noticed the magneto was not 'snapping' as our other EK Wico's do. It sounded lazy.
By loosening the 2 bolts that holds the magneto on and tilting and moving the magneto slightly it got to a spot where I heard the familiar 'snap'.
I had a listen to the video of our engine I posted a few pages back. Sadly the governor sound drowns the magneto sound out.
There's a good paint free contact from the back of the magneto to the mounting plate and from the mounting plate to the engine? If you have a multimeter just check the resistance from the magneto frame to the head where the plug screws in.

I'll get some mixture needles out later to take some pictures. It sounds as though your needle is not tapered over enough length. It should not have ridges either.

Flames out the exhaust....gunna have to try that one.

Cheers Scott
PS: Been up to the shed. All of our mixture needles have the taper running over a length of 6-8mm up the shaft. The slighter the taper, the better the adjustment control but you have to be careful that it still screws down enough to close. They're not that long those needles.

Last edited by Scotty 2; 05-11-2018 at 05:37:37 PM. Reason: been up to the shed
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Old 07-10-2019, 04:00:21 AM
muzzery muzzery is offline
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Default Re: Buzzacot Farm Pumper Rebuild

Hello all.
I’ve already posted this in another spot, but I wanted to attach here to kind of complete this story. I guess that way anyone that googles and gets to this will find the finish. I’m very grateful to those who helped me with tech advice , it was paramount to my finishing.
Also a big thanks to a few of you who sold me hard to find parts.👍👍👍
Now what to do next? Perhaps a yb southern cross I’ve been paying off, and matched to my big southern cross piston pump..
Here’s the video
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