Anybody running a 372 with a Zama/c3m carb?

[Adamam]

Have a 365 that I want to put a big pot on (pot is knackered and open port).

 

Last time I did this I managed to get an HD12, but this time I don't have one.

 

C3m able to supply enough flow for a 372 or even 52mm pot?

 

Cheers

 

Adam

[spudulike]

Have a 365 that I want to put a big pot on (pot is knackered and open port).

 

Last time I did this I managed to get an HD12, but this time I don't have one.

 

C3m able to supply enough flow for a 372 or even 52mm pot?

 

Cheers

 

Adam

 

It will work but just not as well. I wouldn't try modding it with this carb. Last time I tried one of these carbs on a 372 I had issues and refitted the Walbro one but never found out if the carb was the route cause.

 

Try it, tune rich and check the plug colour.

[SawTroll]

The Zama carb of the 365 has a smaller venturi than the HD-12 (17mm vs 17.46 nominally), while you really would want a larger one.

 

The 19mm+ RWJ-4 of the XT versions is an obvious candidate, but from what I recall you will need a few 385/390 parts to make it fit (at least the intake to the cylinder).

Edited June 26, 2016 by SawTroll

[spudulike]

Or just fit the original type again. I think the Zama did have a tendency to bog when you grabbed a handful of throttle where the Walbro handled it fine. Had some fun with a 372 and Jonnie equivalent some time ago!

[Cut4fun]

Tested zama to compare to the bigger walbro on a ported oem 74.66cc top. No difference in cut times to worry about.

Some folks get all crazy with the bigger better theory. But it is just a chainsaw and it is cutting wood. It's a WORK saw not a race saw where it would matter.

Use what you got IMO

[Adamam]

Thanks chaps!

 

This is good information, particularly as it's a low budget saw. I'll build it with the Zama and see what's what.