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Old 25-05-14, 06:50 PM   #1
HobbyPaul
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Default Timing... With no marks.

A mistake I shouldn't of made but in the excitement of having my first engine I did... I never marked anything up before taking chain off and of course since then I've rotated the flywheel.

So with no visible marks has anybody got a tip of how to time it up again.

Thanks
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Old 25-05-14, 07:20 PM   #2
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What engine??? Ignition or valve timing???
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Old 25-05-14, 07:30 PM   #3
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Its a Lister d , so get a coat hanger and bend it so it goes in through the plug hole and turn engine over till you feel the piston come to top dead centre, at this point you will be checking to see both valves rocking indicating tdc , set your points to open 5 deg before tdc and you should be there.

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Old 25-05-14, 07:59 PM   #4
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Nice simple solution.. But working out 5 degrees will be guess work, shall have to see if my kids have a protractor.
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Old 25-05-14, 08:09 PM   #5
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Another way to find TDC is with the keyway pointing directly downwards and check the valve positions as noted.
The ignition mark is usually stamped on the flywheel. Look for a zigzag mark 5 degrees before the top when you have done the above.

Phillip
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Old 25-05-14, 08:45 PM   #6
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No chance of seeing timing marks with it being so heavy pitted, I tried my best to see something but couldn't.
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Old 25-05-14, 08:53 PM   #7
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At a guess I would say piston about 1/4 of an inch before TDC ,,points just opening
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Old 25-05-14, 08:59 PM   #8
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Measure around the flywheel face so you get a dimension X, divide X by 360 to give you X=1 degree, multiply X by 5 to get Y. Y=points open before TDC, find TDC, measure back Y and set points to open there. (I'd go 10 degrees if it was me btw)
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Old 26-05-14, 12:38 AM   #9
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Easiest way .

Set the engine on TDC that is with the keyway at the bottom on the flywheel

place three fingers on top of the flywheel with your index finger on top centre , turn the wheel so your third finger is now on top , that should give you roughly 5 degrees before TDC .

put the timing chain on with the cog on the governor loose , then turn the mag clockwise till just before the points open , hold it still and then tighten the governor cog .

put the mag cover back on and start the engine .

Sit back with a brew and look smug .



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Old 26-05-14, 10:15 AM   #10
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Will that work if you have small fingers and a Bruston flywheel... Or large fingers and a 12 inch flywheel?!
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