Best carb sync tool?

[GuppyWN]

Gauges or digital?

[avidflyer]

How about cheapest? Looks like it works. JImChuk
https://www.youtube.com/watch?v=Y_WDF6glD5k

[Dorsal]

I use the Carb-Mate, seems to work well.

[jiott]

I use gauges and one important thing I have learned is to make sure whatever set of gauges you buy, they are liquid (usually glycerin) filled. This dampens the vibration of the needles and makes much more accurate and easy reading. My first set of gauges from Lockwood were not liquid filled and were hard to use. The set I use now are liquid filled, purchased from a local gauge shop and they work great. You might think that the little screw snubbers that came with the Lockwood gauge set would allow adequate dampening, but that is not true. The liquid filled with snubbers is the way to go.

[GuppyWN]

Jim,
Mind sharing the brand and scale of thr guages you use? I’m thinking I don’t need any Rotax specific plumbing as long as my hose connections are tight? Also, does hose length matter? Do they need to be equal? Assuming not since the Carbmate connects to the balance tube making the lengths different.

[Dorsal]

Given it is a pressure measurement (no flow) hose length should not matter.

[jiott]

The gauges I have are 0-30"Hg vacuum, general purpose, glycerin filled. They are 4FLA8 Grainger approved. Also you will need to buy a snubber for each gauge; I don't have a part number for this, but anyone who sells gauges will have appropriate snubbers. I prefer the screw type snubber rather than the 1/4 turn.
By the way, I really like the idea of that video using the two water bottles. It makes perfect sense, and I may try it.

[JAMES20011]

If you try water bottles do not use light weight ones , I tried them and as soon as the engine started it collapsed the bottles sucking water into carbs;

[efwd]

Awe Man that stinks. He said he used orange juice bottles. They look like Gatorade bottles to me. They are pretty rigid.

[Wheels]

I use a split gauge from a twin engine manifold pressure gauge.
the two needles are independently read from the vacuum of each carb.
When they align, your done.
It doesn't matter at what pressure reading they align, just that they are in sync. again, your done.
I used the carb mate, I have it, Probably won't use it anymore, the dual split gauge is so fast and reliable that the carb mate just collects dust.
I haven't spent more than 20 minutes on a carb sync since I started using it. I do have a qualified operator at the throttle though. Doing it alone, requires shutting down for every RPM check just for safety. It takes a lot longer and uses up the starter that much more.

[jonstark]

What about a magnehelic differential pressure guage? They’re available cheap on e-bay and in the right range are quite accurate.

I do like the simplicity of the drink bottles.

Jon