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Author Topic: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild  (Read 2573 times)

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Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #40 on: January 10, 2019, 12:51:45 PM »
Good thread. Thanks for all the pictures  :^)
You're welcome! It might be kinda long, but I'm always grateful when somebody else takes the time to show me all the little details I could miss on a project like this.

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #41 on: January 14, 2019, 12:31:18 PM »
Below is my shopping list thus far with prices, parts numbers, and suppliers. The wait-and-see list at the bottom is for stuff that was really costly on shipping or I may be able to substitute for cheaper or homemade alternatives, or I'm still determining condition of the original part.

Sorry for the formatting, the forum text editor isn't playing nice...

Parts
    Prices    Description                                HUSQ Reference #
  • $0.99x2 Bar cover bumper                  501 51 72-01
                    hlsproparts.com
  • $8.80 Chip Guard next to clutch          503 76 29-02
                    huztl.net
  • M5x25 Screws for muffler
                    Fastenal or TSC
  • $1.42 Cable for ignition coil
                    huztl.net
  • $0.85x2 Chain catcher
                    huztl.net
  • $8.88 (2) Fuel Filter                             503 44 32-01
                    OEM from Amazon
  • $40.00 New Crankcase Half                503 62 68-08
                    Used OEM from Ebay
  • $0.69 New metal bar plate                   537 04 66-01
                    huztl.net
  • $39.99 New Clutch                               503 74 44-01
                    NOS from Ebay
  • $9.85 Diagram/Gasket Kit for Carburetor (KT-K10-WAT) (K10-HD)
                    OEM from Amazon
  • $14.83 New HD Air filter                      503 81 80-04
                    OEM from Amazon
  • $9.49 New piston ring
                    hlsproparts.com
  • $15.33 Three Bond 1184 gasket sealer
                    Amazon
  • $5.99 Crankcase gasket                     503 62 72-01
                    husqypartsdepot.com
  • $0.99 Exhaust gasket                         503 77 59-01
                    husqypartsdepot.com
  • $11.99 New clutch side seal               503 26 03-01
                    husqypartsdepot.com
  • $7.99 New flywheel side seal             505 27 57-19
                    husqypartsdepot.com
  • $29.98 (2) New crank bearings          503 81 78-01
                    husqypartsdepot.com


Tools
  • $9.99 Piston ring clamp                     502 50 70-01
                    hlsproparts.com

Wait-and-see / Cosmetic Stuff
  • Top Cover (cosmetic)
  • New Huztl Muffler (More flow?)
  • New muffler heat shield?
  • New intake pipe                           503 96 45-01
  • Replace all exterior screws with stainless
  • Clutch side seal extractor                502 50 55-01
  • Flywheel side seal extractor            504 91 40-41
  • $5.57 EPA tube                           503 40 06-06
                    hlsproparts.com
  • $4.36 Fuel tank line                        544 32 50-02
                    hlsproparts.com
  • Clutch drum bearing                       503 43 20-01
  • Piston wrist pin bearing              503 25 56-01
  • $17.40 Crankcase splitter               505 51 61-01
                    huztl.net

  • New rubber protectors for handle connections

Offline 01crewcab

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #42 on: January 14, 2019, 06:20:37 PM »
You're doing a bang up job. Just read thru your parts list. I have a 372XPW. The muffler on it is pretty much open on the inside. You can? perhaps find a factory jungle muffler on ebay. I did, but it was a while ago. Looks like some pretty poor oil was run thru it judging from the carbon build up.
2100(2),480, 281, 181,372XPW, 460,435,350,61(4),51-Huskys
49SP, 630Super(3),670's(4), 830, 920, 930 Jonsered's
S-XL925 Homelite
SP125C, 790, 250, 1010 Macs
27Ton Troybilt Splitter
NRA Life Endowment Member
Viet Nam Vet

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #43 on: January 15, 2019, 01:26:09 PM »
Thanks, 01crewcab. I'll probably wait until the thing is back together and running before I mess with muffler upgrades, etc. so I can see the before/after effects. I wouldn't doubt that about the oil, or maybe that's blow by from worn out piston ring?

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #44 on: January 19, 2019, 03:31:15 PM »
Hmm.. Got the carb kit in the mail. Started taking it apart and realized I had the wrong kit. The metering diaphragm didn't match. The carbsunlimited website listed the wrong kit. Walbro's site didn't even list the HD-12-A anymore. I think what happened is the HD-12-1 part # replaced the HD-12-A. Every image I can find of an HD-12-1 carb looks just like mine. So, I'll return the K10WAT kit and order the K10 HD kit instead - that metering diaphragm matches, at least. Next time I'll do a little disassembly and compare photos before digging in.



 

 

 

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #45 on: January 27, 2019, 02:46:35 PM »
Got the right Walbro repair kit finally. Also ordered an assortment of plastic baggies so I can group the little parts. Also labeled these baggies with the figure numbers in the service manual. I took photos of each part before removal so that I wouldn't get confused about their orientation later.



 

 Pump cover and gaskets, opposite side of carb.

 Fuel filter pulled with a pick. Note the debri.

 The HI- LO mixture screws. One is longer than the other.

 


Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #46 on: January 27, 2019, 02:53:32 PM »
Now the throttle/choke lever arms, butterflies, and spindles.

 

 The butterfly plates seem to have a specific left/right or front/back orientation.

 

 Made note of where the springs were perched and how many times they were wound for tension

 

 

 

 This spring mounts in a tiny hole near the gasket surface .

 

 This little detent ball will fall loose if you aren't paying attention. Bagged it immediately.


Offline Jack S

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #47 on: January 27, 2019, 05:04:46 PM »
Looks like you are doing ok but one thing that folks miss is making sure the high and low speed orifices that exit in the venturi are clear. internally they are behind a soft plug where crap can plug them up I have salvaged a lot of carbs that get replaced because myself included didn't catch the plugged metering orifices if I'm using the right term. clean em soak em and blow  em out. Just think what in a metal carb could wear out? why replace it when usually it's just plugged with corrosion or crap. I hope this helps as I never seem to see this addressed. I admire  your determination in restoring this ol saw  Good luck Jack 

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #48 on: January 27, 2019, 10:50:44 PM »
Thanks, Jack. Unfortunately, I've already got the carb back together. The repair kit from Walbro didn't come with a new Welsh plug, of course. A video I was watching on this subject made the same comment. I'll go ahead and order the Welsh plug and work on the rest of the saw. I may try to run the saw and see if there is a before/after difference to be gleaned from cleaning those orifices because I'm curious.

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #49 on: January 27, 2019, 11:23:37 PM »
The carb parts are all cleaned now. Chem-dip followed with toothbrush and simple green. These photos may be kinda redundant, since I'm just going back the way I came.

Re-insert detent ball and set spring in this hole.


 
Re-attached butterfly and checked spring tension


 

 

This spring was a little trickier to wind. Ended up winding against the set screw with the spindle partially pulled out, then pushed the spindle home and pried the spring end into place with a pick.


 
This butterfly slots into the middle of the spindle, don't forget to match the original orientation.


 

Next comes the step lever (for lack of a better term). Bushing comes first, then you have to hold back the butterfly lever and gently rest the little guy in position and place the screw. Make sure you have your screwdriver in arms reach or you will probably have to start over.


 

 

 

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #50 on: January 27, 2019, 11:43:02 PM »
Now the metering and pump parts.

First the HI-LO screws.
 



The new fuel filter. Used a 3/16" socket to press home. A 5/16" punch fit nicely as well.



 

 

    

Next the pump cover, screen and gasket.



 

Now I prepare the new metering lever, spindle, spring and needle. Note the wear on the original lever (left side). I think I left the original needle in the carb body when I Chem-dipped it - not going to fish it out.



 



 

 

Securing the spindle is a little tricky. Gotta fork the needle onto the lever while simultaneously setting the dimple on that same lever in the spring, while aligning the spindle into it's groove. Have the keeper screw and screwdriver in arms reach or you'll have to start over.






 

Service manual says to check the metering lever with a straight edge so it is level with the surrounding gasket surface. I bent mine back down just a hair so the straight edge depressed the lever, but just barely.



 

Install the metering gasket, diaphragm and top cover. Carb is complete.




 

 


Offline Allar

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #51 on: January 28, 2019, 05:50:12 AM »
Sorry for your loss.  I really like what you're doing, keep it up.
Check out my  videos: Xtreme Landlife - YouTube

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #52 on: January 28, 2019, 11:42:20 AM »
Thanks, Allar.

I built a crankcase splitter yesterday afternoon. I found one pretty cheap at Huztl for $17.50, but shipping was $30.00 and I didn't feel like waiting for it. I had enough scraps laying around anyway.

Transferred some measurements from the case.


 

 

 



Rough cuts from 3/16" flat bar.


 

Beveled the pieces together for welding. All you pro fabricators, avert thine eyes - it's gonna get ugly :)



 

Tacked the arms together so the final grinding will book match.



 

 

The metal curls a little bit after the welding, but that's easily straightened with a sledge and anvil.



 

Double check clearance inside the crank case. Removed a little metal from the lower backside of these arms.




Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #53 on: January 28, 2019, 11:57:13 AM »
Using the flats in the cylinder base as my outer limits for these arms.



 

Transferred the limits to some 2" square tube, beveled the arms.



 

The arms just get an initial tack so, I can fine tune the final position in the crank case.



 

 

Once I like the fit, I add a strip of reinforcing metal to reduce moving while the fillet weld below is happening. This will be ground off later.



 

Had a half inch bolt and nuts on hand. These will become pressure screw. Left a little daylight between each nut to prevent bind up.



 

Used a couple more nuts on the opposite as spacers to keep the screw arms parallel.



 

 


 

Check the fit again from both sides of the case. Looks good.



 

Welding complete. I'll probably have to chase the threads with a tap, but it should do the job.



 

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #54 on: February 04, 2019, 02:37:16 PM »
Finally got around to splitting the crankcase.

Pointed bolt to center in crank end. 



 

Remove last screws.



 

 

 

Mount up the splitter. Everything that touches the crankcase got a dab of oil.



 

Have a soft landing pad ready.



 

A few turns an she pops open. 



 

The two original halves.





Insert flywheel half into splitter to press out the other side of crank.



 

Discovered skinny O-ring on flywheel side.



 

New and old halves side by side.



 

If it weren't for the missing chunk, I'd say the original half was in better shape. The new one has lots of pitting from corrosion.



 

I think I may try filling some of these areas with metal putty, at least where they may impact structure or gaskets faces. What do you guys think?



 

 

 

Old bearings. These are getting replaced.



 

 

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #55 on: February 11, 2019, 11:54:12 PM »
Removed the old bearings and recovered some small parts off the old case half tonight. Would have popped in the new bearings but I left them at work.  


Gathered up a mallet, a couple punches and sockets to tap on things.


 

Pulled off rubbet/plastic bits while oven is heating to 390 deg F.



 

Let the case soak heat for 10 minutes and tapped out bearing with 5/8 socket.



 

Repeat on clutch side. Also scavenged wrist joint pin for chain brake and the two bar studs.



 

Also scavenged this little plug. No idea what it does, but the plug on the replacement case looked pretty corroded.



 



Wrist pin installed in new home.





Checked fitment of new and old. Pretty amazed how well they match.



 

 

Spare bar studs and case alignment dowels



 

These bearings seem pretty well cooked. Nothing smooth about these.



 

Numbers etched on side confirm I've got the right replacements.




Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #56 on: February 12, 2019, 11:51:09 PM »
Got the bearings home. Cleaned up the case halves one more time. Scoured as much residue from the mating surfaces and cylinder base as I could with scotch brite.

Cold, the new bearings will not drop into their recesses. If they did, that would mean my cases were worn beyond repair.





Heated to 390 deg F (the cases, that is) and the new bearings drop right in, no fuss.





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