Compression test?

[stevenm]

Hi Stevenm

You dont say what has been doen to the engine. Is the valve timing seriously wrong (valves "rock"" just after tdc.) Are the ign leads in correct order and firng on compr stroke?

Thanks Bob, visually I have no idea if the timmings are out on the valves however they look about right , also to achive any compression at all they valvues must be in sudo sync with the pistion ? Surely ?

Bob & Nick

Thanks yes I'm 100% the leads are in right order and firing sequence is correct, and rotation is in the right direction , also checked gap, spark etc and that its timmed to TDC on the compression stroke, as discussed im getting puffs of exhaust so were close. 

John - petrol im using is a week old and in a plastic petrol can with lid.

I've no condensor on the spark system, the coil is a RED Accuspark and im using 123 petronics spark not points, ill take a video / pics to provide better info on my configuration and a small update to folllow .

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Fuel down the plug holes is my standard fix for an engine not wanting to go.

You have compression so if the timing and firing sequence is right it should give you a couple of revs which means it has the potential to run.

If you are getting any kickback on the handle it is over advanced for an engine you are having problems with.

Hi Simon et all

Thanks everyone for the support and suggestions,

I put petrol down the 4 cylinders, and cranked got a sort of a run on. so adjusted timing a little , re filled the cylinders with drop petrol AND  burnt out my starter !!!!, looks like just the 2 brushes are gone hopefully so have a new set on order from A7c - so will clean out and rebuild starter over next day or so and hope David is handy to the post office.

Meantime ill tinker with the other 100 issues and get back to you once have a functioning starter.....