Hybrid clonesaw 365 with a 390 topend - aka the "86'r from youtube"

[upstateamish]

What about the 55mm 390 piston?

the 390 wristpin is 13mm. I don't think they sell it seperately but I found this which is the needle bearing for it + multiple other models.

Husqvarna 181, 281, 288, 385, 390, 394, 395, K950, K960, K970 piston pin bearing

Husqvarna 181, 281, 288, 385, 390, 394, 395, K950, K960, K970Piston pin support bearingReplaces OEM 503 25 61-01

www.hlsproparts.com

If my crankrod swap idea works, then the 390 piston could be an option.

 

[Woodwackr]

the 390 wristpin is 13mm. I don't think they sell it seperately but I found this which is the needle bearing for it + multiple other models.

Husqvarna 181, 281, 288, 385, 390, 394, 395, K950, K960, K970 piston pin bearing

Husqvarna 181, 281, 288, 385, 390, 394, 395, K950, K960, K970Piston pin support bearingReplaces OEM 503 25 61-01

www.hlsproparts.com

If my crankrod swap idea works, then the 390 piston could be an option.

Those pins are all over the place I think I’ve given most of what I had away but others should have them. Very common size.

 

[Maintenance Chief]

@Ronie

 

[Ketchup]

385 is 54mm but 13mm pin. 660 is 54mm but 12mm pin. 365 crank is 12mm pin. No shenanigans with the crank. Only 82.45 cc, but that’s a bump more than XPW. Would probably run great on the HD12 as well.

 

[Rich Fife]

I was curious if I could attempt tig welding the intake ... of course then I wasn't sure if the plating would lift

I completely scrapped a 660 cylinder trying to tig the intake floor... I'm sure it's possible but, I lacked the skills to do so.

 

[upstateamish]

I completely scrapped a 660 cylinder trying to tig the intake floor... I'm sure it's possible but, I lacked the skills to do so.

Yeah, I guess I'll stick with Epoxy for now and test out my (nonexistant at the moment) tig skills on some scrap cylinders to experience what occurs.


Prototype #2

I started this out with the goal of building a few saws. I think it makes sense to keep it all in one thread.

The sacrificial crank I ordered for the "prototype number 2" should be showing this today. In preperation I tore down the new saw in preperation.
The goal was to extract the crank, to see if the hybrid idea works (if not I have a spare 372 shortblock inbound) but since I plan to clearance the case a bit to fit the cylinder, it made sense to tear it down.






Quality of the parts is more or less the same as the first

also have a pile of replacement build parts accumulating.

Most is from TheDuke, the rest is from HL Supply & Chainsawr (Mostly AM, but some OEM)
- 372 x-torq top cover
- 390 chrome cylinder (last one was Nikasil, it was what was in stock. not sure it'll matter much in this case.)
- 372 x-torq choke lever (OEM)
- 365 x-torq low top air filter horn (OEM)
- 395 carb
- filter (OEM)

 

[Ketchup]

If the crank mods don’t work out, cutting the caps for the wrist pin isn’t that bad. I scrapped my first attempt but the second one went pretty smooth. I had to trim 0.25mm off the 12mm pin on each end to get it all inside the circlip lands but it’s all together now.

Edit: I love the plastic bag that just says “SAW”.

 

[upstateamish]

If the crank mods don’t work out, cutting the caps for the wrist pin isn’t that bad. I scrapped my first attempt but the second one went pretty smooth. I had to trim 0.25mm off the 12mm pin on each end to get it all inside the circlip lands but it’s all together now.

excellent, having a plan B is a good thing!

Edit: I love the plastic bag that just says “SAW”.

I noticed that label as well, got a chuckle out of me.