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Antique Gas Engine Discussion

Sneaky Tricks for timming low tenshion engines


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Old 09-01-2005, 02:33:39 AM
Roo Roo is offline
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Question Sneaky Tricks for timming low tenshion engines

Hi guys,
I've been frustrating over the timming of the Wiscona for two days now. I'm confident i've got everything thing right except for the push rod that trips the webster M.

The push rod as a thread the runs back into the excentric which naturally enables the push rod to either shortened or lengthened. there is also a small angled block on the push rod which is also adjustable to give verticle throw adjustment over the roller on the ignitor bracket.

Can someone give me a crash course in timming an engine with such a setup. There has to be a simple non frustrating way to do this!!

Thanks so much,
Roo
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Old 09-01-2005, 03:37:01 AM
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Default Re: Sneaky Tricks for timming low tenshion engines

G'day Roo
Here is a bit of a crash course in webster timing. Seeing that your trip rod is connected to an eccentric, if the valve timing is right then the ignition timing will be close.

So first back the wedged block right off on the rod and then get the trip rod to cock the mag at a 45o angle by screwing the rod in or out, as you will get optimum voltage if the mag is cocked at a 45o or more angle(lining up the spring carrier on the armeture at the rear of mag with the end plate screws is the easist way).

Now the purpose of the wedge is to release the rod at the right time so the engine will fire at the right spot.

So now move the wedge up the rod till it lets the rod go and trips the mag.
You may have to play with this a bit to get it to trip in the right spot by moving the wedge back and forth and also screwing the rod in and out but make sure the mag is cocked at the 45o plus angle before it lets go other wise you wont get a very hot spark.

Hope this was not to confusing so give it a go and see how you go.
If you stil get stuck give me a call as its alway easier to explain when you are talking to the person!


Cheers
Mick Christie
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