So I am planning on working on my carb sync today, I really want to just make this carb sync tool (http://www.powerchutes.com/manometer.asp) with one hose and some water in the middle and level out the water with reference to carb 3 one at a time. Will this work, and should I use gas in the tube? any advice would be appreciated.

 

These work great on 2 cylinder or 2 stroke engines.

To sync a 4 cylinder, you need to be measuring all four of them at the same time....adjusting 1 affects those after it (its all a bunch of springs stacked up in series across the 4 carbs). You could work you way from 1 end to the other, and then double check it....should get you close. Otherwise,you'd want 4 tubes sucking water out of a pail....they'd have to be pretty tall collumns.

A typical mercury stick has a length of around 40 cm Hg....thats like 240 inches of water. at idle, you'll see a vacuum level of mid 20's (cm's of HG). If you blip the gas and shut the throttle fast, it can spike much higher.

Gas is even lighter than water...so your stick would have to get longer still.

You can get a 4 gauge unit off ebay for $40 - don't know how good they are. I have an old mercury stick that I will be replacing with a Morgan CarbTune. Motion pro has a new one that works like a mercury stick, but uses a different non-toxic fluid.

good luck