They all have a TDC mark on the crankshaft pulley. Some also have marks to 50 degrees and some do not.
#1 cylinder when cranking is supposed to get spark when the pulley is at 5 degrees BTDC (before top dead center). That's when it's on the compression stroke. Easy to tell. Just loosen a spark plug and when it hisses because air is coming out - it's on the compression stroke.
If you have an engine with a crank pulley NOT fully marked, you can mark it yourself with a tape measure.
Points get set at .014" in your Lucas distributor. Static/initial timing is 5 degrees BTDC. Full advance is 39 degrees BTDC at 2200 RPM. Timing marks are on the crankshaft pulley. If your's only has the TDC mark and no 5 degrees BTDC? 5 BTDC is 9/32" before the TDC mark. 39 degrees BTDC will be 2 7/32" from the TDC mark.
When the engine is at 5 degrees BTDC, you can time without a timing light if you want. With power on, just loosen and rotate the distributor in the normal direction of travel - then back slowy until #1 wire sparks.
If you get working on your VN or VNN Zenith carb - keep in mind it is a British Zenith and has nothing to do with USA Zenith carbs.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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