372XP rebuild for a newby

[half_full]

betting on oil pump. the taper on the back of the pump piston adding drag as it reaches max extension?

 

[brianpgriset]

betting on oil pump. the taper on the back of the pump piston adding drag as it reaches max extension?

Get ready to laugh everyone, it was the magnets in the flywheel passing by the coil!

Ok well made a bit more progress. Made up a ground wire pigtail for the stop switch which allowed me to put the recoil starter on and close up flywheel side. Also reassembled the chain brake on the clutch side.

Last thing I wanted to do was get in the new fuel line. Well my needle nose pliers weren't long enough. I found a video where a guy uses some surgical forceps which looked good cause they are skinny and long but nowhere in town had any. So driving home brainstormed an idea, took a 10" long piece of old brake line I cut from a spool I had lying around the. Put a loop of fishing line through to make a snatcher, kind of like they use to catch wild animals. Fish the open end over the stub, pull tight, and it worked the new line through, worked great.

 

[brianpgriset]

Here is the hook for getting the fuel line:

Hard to see the fishing line but it's there

 

[Sty57]

When I put lines in. I take a small piece of wire and put it in from the top, then slide the line over the wire up to the top hole and grab it with a needle nose. Just make sure you cut the line at a angle and it should start into the hole.

 

[Chris_In_VT]

Magnets on the flywheel, done that one before!
Don't sweat it
On fuel lines, I usually put some 2T oil on them and push them far enough in to hook them and grab it with pliers. Different ways work.

 

[rob066]

Magnets on the flywheel, done that one before!
Don't sweat it
On fuel lines, I usually put some 2T oil on them and push them far enough in to hook them and grab it with pliers. Different ways work.

I also use a little lube one the fuel lines I cut a slight angle on the line for easy entry into the tank. I then trim it square for the filter.

 

[brianpgriset]

Ok so got a chance to do a bit more work. Waiting for one more part to get in for the tank so I focused on the top end. Cleaned the Husky cylinder and piston real good. Pulled off the rings and installed the piston on the con rod. Bolted up the cylinder without base gasket to check squish. Found a good link here, said to use some solder in an upside down "u" with its legs crossed. Lucky I had some 0.031" solder handy. I got 0.020", perfect. Reinstalled the rings, circlips on and in the 12 o'clock position, painted on some Moto-seal on the base of the cylinder with a really small brush, and pushed the cylinder on.

This thing will be done real soon, as soon as I get that dang part in.

Next up is pressure/vac test and compression test. If that all goes good this thing will be ready soon.

 

[brianpgriset]

Piston on.

 

[brianpgriset]

 

[brianpgriset]

 

[brianpgriset]

 

[Chris_In_VT]

Don't know if you mentioned it or not, but is this saw getting muffler mod also? Looks like it's coming along real well for a "newbie" rebuild. Nice work!

 

[brianpgriset]

Muffler mod for sure. And don't worry I'm sure I'll mess something up soon!

 

[ft. churchill]

I remember my first rebuild, a 61 white top I put a 272 top end on. I made some mistakes, but keep at it and they will all be resolved. Your thread is great and the 372 is turning out cherry!

 

[brianpgriset]

Been awhile since an update, the last of the parts I need finally came in!

Sure enough first goof up. I didn't realize you really should install the cylinder with intake boot AFTER you install the little plastic platform where the carb mounts! I messed around trying to get it together right for probably two hours when I realized it would just be easier to pull the cylinder back off and reseal it.

Lesson learned. I went ahead and pulled of the cylinder and that's as far as I got. I'll have more pics and updates soon!

 

[brianpgriset]

Ok got the cylinder off, installed the carb mounting plate, then boot on the cylinder, cleaned the surfaces, then reinstalled the cylinder with MotoSeal so it's all back together

Just need to make up some plates to run vacuum and pressure tests. If all holds, a few minor parts to put on and a carb rebuild and I'll be done!

 

[half_full]

I see an MV8500 box that the saw is sitting on. That's a great tool.
I use a small piece of inner tube as a gasket on intake and exhaust side.
On the intake, just make the gasket and bolt the carb on with the inner tube on the cylinder side of the carb.
For the muffler, I used to try to use the muffler in the same way as the intake. It was a 50/50 on sealing it up. So, I make a plate out of 1/4" steel as that's what I have on hand.

 

[brianpgriset]

Yep got the MV8500 for Xmas for this and a few other projects. I have plenty of 1/4" and 1/8" scrap plate and taps so I'll hopefully make those up this weekend.

 

[brianpgriset]

 

[Landmark]

Thats looking good. You are going to have somthing to be proud of