kelvin poppet

[kennyk]

hi all, am new here and wondering if anybody knows how to time the valves on a kelvin 3 hp petrol paraffin single poppet valve. it was running fine until the mag sprocket came loose and dropped off stripping some teeth of the fiber cam drive cog I put another sprocket off a two cylinder engine on, it's the exact same but no timing marks on it,,got the engine to run (trial and error) but rough,blowing out oil and fuel, and stops after a minute or two,,doing my head in,,any advise would be welcome apart from using it as an anchor,,,YET,,,,,cheers,,kenny

[tom_c]

I'll have a look later if i can get to my poppet valve engine, mine is a 6HP twin but still has timing marks intact on the gears. at work at the moment.

Tom

[stagedamager]

Hi Kenny,

welcome to the forum. I've sent a link to my brother, who has a poppet valve and may be able to help you.

 

regards

 

Dan

 

Edit, I see he beat me to it!!

Edited August 3, 2014 by stagedamager

[tom_c]

this is copied from the poppet valve service manual,

 

53. GEAR WHEELS.--If the flywheel is removed, see that it is replaced so that the marked teeth mesh with one another. Should a new (unmarked) gear wheel be fitted, mesh the teeth of it so that the exhaust valve closes and the inlet valve opens with the piston at the top (the inlet valves are those in the centre). When so meshed, mark the teeth of the new wheel with a file. A small piece of chalk dropped in the teeth serves to mark them until the file can be applied.

 

hope this helps

Tom

[tom_c]

how did you get on with this poppet valve? i seem to be collecting quite a few spares for these engines at the moment

Tom