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villiers 1934 marvil timing

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villiers 1934 marvil timing

Post by Diddy on Thu Nov 22 2012, 22:06

hi guys does any one know how to time a marvil century engine.as im at my wits end now.i keep try to ajust a little at a time but still no go.please help.& ther is no timing mks on it.

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Re: villiers 1934 marvil timing

Post by nutgone on Thu Nov 22 2012, 23:40

Are you having trouble getting it started then? The timing should be pretty forgiving on these, so as long as you're in the rough area it should go. I'm convinced the Tarpen engine is based on these, if that's the case I think it's about 1/4" before TDC on the piston, dunno what that is in degrees.

Thinking about it I usually find 1/8" before TDC a good place to start, that 1/4" sounds a little advanced to me, but I'm pretty sure the Tarpen is there or thereabouts.

If it's a tricky starter you may want to look down other avenues, like all the trouble I had recently getting the Tarpen to start (I'm not saying any more unless I have to Embarassed )

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Re: villiers 1934 marvil timing

Post by kevjhnsn on Fri Nov 23 2012, 00:36

nutgone wrote:Are you having trouble getting it started then? The timing should be pretty forgiving on these, so as long as you're in the rough area it should go. I'm convinced the Tarpen engine is based on these, if that's the case I think it's about 1/4" before TDC on the piston, dunno what that is in degrees.

Thinking about it I usually find 1/8" before TDC a good place to start, that 1/4" sounds a little advanced to me, but I'm pretty sure the Tarpen is there or thereabouts.

If it's a tricky starter you may want to look down other avenues, like all the trouble I had recently getting the Tarpen to start (I'm not saying any more unless I have to Embarassed )
DIDDY
well im splitting hairs here Smile
but all petrol villiers manuals say they are 3/16" BTDC on the piston, then rotate the flywheel untill the points are closed ,then tighen up to crankshaft , if i was you diddy i would mark the output side of crank or pulley to a casting mark for lining it back up too in future
and the fit the flywheel loose and find when the points close ,and mark that up so you cheeck and double check as your tighening up the flywheel,as they always move of the settings as u tighen the flywheel to the crank ,with that keyless stupid shaft idea of theres Mad
always takes me 2-3 trys to get it all tight and the timing in the right place
kev

well im splitting ha

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Re: villiers 1934 marvil timing

Post by Diddy on Fri Nov 23 2012, 00:52

i cant get it timed up.now the cil that was fitted under neath does not spark its from a car i beleave.its got earth wire.live wire & the ht lead.need to get it running again as its got to go up for sale.to help with my mobility scooter fund.dont know what els to try to get a spark back.ideas please but simple & cheap is poss.
thanks for help so far.

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Re: villiers 1934 marvil timing

Post by nutgone on Fri Nov 23 2012, 10:24

Have you tried a different condenser??? It could be that.

I didn't realise you were running off a car type coil, I'm guessing the original mag coil is no good then?

Do you have a multimeter? One of us can run through testing the coil, my car takes the old fashioned coils, I can give you some ballpark figures from my Haynes book of lies.

Kev: Ah! So it's 3/16" I was going on what the Tarpen was set at, never seen any marks or manuals for it (& I didn't have my glasses on at the time Embarassed ). The Tarpen has a WICO FW mag anyway, not the Villiers thing with no key (I remember them now, they were fun! Mad )

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Re: villiers 1934 marvil timing

Post by braydh on Fri Nov 23 2012, 11:08

Try 3/16 points at opening point I use a continuity tester to get that bit right as I can never find my glasses good luck with it !!!

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Re: villiers 1934 marvil timing

Post by nutgone on Fri Nov 23 2012, 11:15

braydh wrote: I use a continuity tester to get that bit right as I can never find my glasses good luck with it !!!

I use a fag paper, but that's mainly because I smoke roll-ups, a continuity tester is by far the most accurate way of doing it. Besides, hardly anyone smokes any more, us smokers definitely are a dying breed, but I never quit anything in my life before, I'm not about to start now! (maybe next year).

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Re: villiers 1934 marvil timing

Post by Diddy on Fri Nov 23 2012, 13:46

the car coil is dead.so need to get another coil. from some ware.

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Re: villiers 1934 marvil timing

Post by nutgone on Fri Nov 23 2012, 19:08

See if you can get a motorbike coil, it'll be smaller. But a car one will be easier to find. Ebay is probably your best bet.

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Re: villiers 1934 marvil timing

Post by Diddy on Thu Dec 06 2012, 01:03

replaced the coil stil no spark nor will the points open now.im just about to loose it with the dam thing.

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Re: villiers 1934 marvil timing

Post by nutgone on Thu Dec 06 2012, 10:25

Have you tried new condensers???

I would say check, check & check again the wiring. If the coil's fine & the condenser's working, as long as points are opening it should spark.

I don't suppose you've considered getting the mag sorted & doing away with the car coil then?

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Re: villiers 1934 marvil timing

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