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 - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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