Husqvarna 365 to 372xp build

[cdntbone303]

Got an original first edition with the square intake Husqvarna 365 and open port cylinder here that I found. Its resting place was in a barn on a bench in pieces where it sat for many years. It had a snapped piston skirt(think I got that wording right) anyways it is now on my work bench in the basement with a bunch of new parts that were missing. I was planning on just rebuilding as a 365 closed port but ran across a video on youtube by fleetcommand upgrading a 365 special to a 372 and that has given me the bug. My first question is this what is the difference between the one ring and 2 ring pistons for this saw?

 

[cdntbone303]

Alot of parts are ordered to do the conversion. Missing any?
- Aftermarket farmertec walbro HD12 to replace Zama c3m
- Round intake manifold. I see there is a oval intake cylinder available too. Any performance difference between the oval and round intakes/cylinders?
- Round clamp(just incase)
- 372 air filter elbow and HD filter
- taller 372 air filter top cap
Just missing a 50mm nikisil cylinder with piston and a caber ring(s)

 

[huskihl]

All you need is the piston, cylinder, intake clamp, and boot.

 

[Deleted member 117362]

Got an original first edition with the square intake Husqvarna 365 and open port cylinder here that I found. Its resting place was in a barn on a bench in pieces where it sat for many years. It had a snapped piston skirt(think I got that wording right) anyways it is now on my work bench in the basement with a bunch of new parts that were missing. I was planning on just rebuilding as a 365 closed port but ran across a video on youtube by fleetcommand upgrading a 365 special to a 372 and that has given me the bug. My first question is this what is the difference between the one ring and 2 ring pistons for this saw?

One ring pistons have a 1.5mm ring and 2 ring has 1.2mm. It's about what you want. 2 rings are epa saws. I have never notice a difference in running, but I am also sure many have.
Everyone has an preference. If you put that closed ported p/c up for sale and it clean, people will be all over it. Talk to @huskihl he ports these saws, may convince you to keep that closed 365.

 

[sunfish]

I prefer closed port 365 over 372. Ported.
But if you're doing this go with oem 372 top end.

 

[cdntbone303]

One ring pistons have a 1.5mm ring and 2 ring has 1.2mm. It's about what you want. 2 rings are epa saws. I have never notice a difference in running, but I am also sure many have.
Everyone has an preference. If you put that closed ported p/c up for sale and it clean, people will be all over it. Talk to @huskihl he ports these saws, may convince you to keep that closed 365.

It is an open port oem 365 cylinder. I was reading open port has less power then closed

 

[cdntbone303]

I prefer closed port 365 over 372. Ported.
But if you're doing this go with oem 372 top end.

How about nikisil cylinder/meteor piston/caber ring oem 50mm sizes

 

[gary courtney]

I too am building a 365SP to a 372. Mine already had the boot on it. I am putting a 50mm oem that I had in stock on it .The 48mm I took off is flawless!

 

[gary courtney]

Aftermarket farmertec walbro HD12 to replace Zama c3m

I tried china carbs to no avail. Go oem.

 

[cdntbone303]

I too am building a 365SP to a 372. Mine already had the boot on it. I am putting a 50mm oem that I had in stock on it .The 48mm I took off is flawless!

Mine too is flawless. Yours had the round or square boot? Carburetor is a Zama?

 

[sunfish]

How about nikisil cylinder/meteor piston/caber ring oem 50mm sizes

Oem cylinder is much better and not much more money for the kit. Meteor piston is fine, but AM cylinders are hit & miss, mostly junk.

 

[gary courtney]

Mine too is flawless. Yours had the round or square boot? Carburetor is a Zama?

round

 

[Deleted member 117362]

What's wrong with that Zama carb?

 

[huskihl]

What's wrong with that Zama carb?

A 7900 would say there’s nothing wrong with them. I agree

 

[Derf]

I prefer the Zama c3M “twin Jet” on a ported saw. Rich @Poleman has had good luck modifying them to flow better than the Walbro. I got good gains on my saw just from him drilling and tuning the jets on the Zama.
The Walbro HD12 is an EPA version of the HD6: slightly smaller Venturi. But pretty dead nuts reliable on a stock saw.

Walt @AFleetCommand can answer any questions you have.

 

[cdntbone303]

372 project aborted, sticking to original 365 build. Couldn’t justify the extra $200+ for the extra parts

 

[Yotaismygame]

The zama carb is my favorite. Can find oem top ends for less than $120.

 

[henry r]

The zama carb is my favorite. Can find oem top ends for less than $120.

Damn. I priced a genuine 390 top end here in australia... over $700 from memory.

Even with our weak $ it would be far cheaper to import one.

 

[cuinrearview]

Damn. I priced a genuine 390 top end here in australia... over $700 from memory.

Even with our weak $ it would be far cheaper to import one.

You'd be better off buying a whole NIB 390 from @AlfA01

 

[henry r]

That was A$700 so us$471... our $ has gone up a 10 cents us since i last looked.