Author Topic: Homelite C series / XP Cylinder Porting Question  (Read 593 times)

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Offline 2manyhobbies

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Homelite C series / XP Cylinder Porting Question
« on: October 14, 2013, 07:26:07 pm »
I posted a thread on the arborist forum (my name there is ILIKEHOMELITES, 2manyhobbies was taken) a couple weeks ago with a picture of the 0.030" cylinder for my Homelite C9.  It is kind of a mystery since the cylinder is exactly 0.030 oversize, and the piston is marked as such.  Well the cylinder is beyond hope, the scoring is through the re-chromed layer.  As I was looking on eBay I found a cylinder (already sold) for a 1020xp saw and noticed that the skirt of the cylinder is different than the C9.  It appears that the location of the intake ports is similar, but it has a complete diameter under it (see the pics.).   From a porting perspective how does this change things?  Is the design of the case different for the different designs?  I understand that the diameters of the cylinder are different, my question is about the design.  Why you would ask?  This may end in disaster, but I am thinking of sleeving the C9 cylinder like the XP cylinder and I wondered if it would be OK?

1020XP cylinder


C9 cylinder
Stihl 017, Stihl MS250, Solo 645, John Deere CS56, Homelite C-51, Homelite C-72, Homelite C-9, Remington Super 754, Husqvarna 3120xp

I think that's all of em'

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Online 3000 FPS

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Re: Homelite C series / XP Cylinder Porting Question
« Reply #1 on: October 14, 2013, 07:44:54 pm »
I am not a porting expert but was interested in your picture of the 1020 xp cylinder.   That cylinder shure does look thin and being that it is that thin does it cause any problems with distortion from heat?
PP 505, 475, 445.

Offline 2manyhobbies

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Re: Homelite C series / XP Cylinder Porting Question
« Reply #2 on: October 14, 2013, 08:01:13 pm »
I am really interested in it because it makes salvaging the cylinder with the sleeve method viable (only because I have the machinery to do it.)  Without having the complete band I would have to cut out all support around the intake fins, with the band I can cut ports near the end of the intake runner like the XP cylinder.  I would think that the XP cylinder would be coolest around that section of the cylinder since the cool intake gasses would be traveling through the ports, and it is supported about every 10 with a runner.

Stihl 017, Stihl MS250, Solo 645, John Deere CS56, Homelite C-51, Homelite C-72, Homelite C-9, Remington Super 754, Husqvarna 3120xp

I think that's all of em'

Offline sharkey

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Re: Homelite C series / XP Cylinder Porting Question
« Reply #3 on: October 14, 2013, 11:52:06 pm »
How bad is the original cylinder?  One little score line can still be used.  You could sleeve the cylinder but do you have a piston that will work with the sleeve or are you planning to cut a piston as well?  Its alot of work.  If your doing it as a project just to see if you can, that is one thing.  But if you really want to run the saw, I think I would look for the right parts.   

I would start with http://www.houseofhomelite.proboards.com/ and see what you might find.  There are some places with nos Homelite parts inventories around.  Another source may be Joyce a/k/a chainsaw lady who is another Homelite parts person.  You should be able to find her through chainsaw collectors,  http://www.chainsawcollectors.se/     

Offline sharkey

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Re: Homelite C series / XP Cylinder Porting Question
« Reply #4 on: October 15, 2013, 12:25:35 am »
Did a little digging and it looks like there are similar models.  Ignitions and starters are different but carbs and top ends may mix and match. 
C-9, stroke 1.5625 in., bore 2.0625 in
xl-925, stroke 1.500 in, bore 2.0625 in.
C-51, stroke 1.5 in., bore    2.00 in.

Scott at Chainsawr might have a cylinder and piston set that would bolt right on. 
http://store.chainsawr.com/products/homelite-c-5-c-51-c-52-chainsaw-piston-and-cylinder-set
   

Offline Eccentric

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Re: Homelite C series / XP Cylinder Porting Question
« Reply #5 on: October 15, 2013, 01:10:19 am »
The C and XP series saws share some parts (handle/carb box castings, gaskets, carb types, fasteners, basic architecture, etc).  The XL-700/800/900 series (SXL-925, etc) is completely different and shares almost nothing with the C/XP series.
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Offline Al Smith

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Re: Homelite C series / XP Cylinder Porting Question
« Reply #6 on: October 15, 2013, 06:19:26 pm »
I'm afraid if you try and press a sleeve in over the open type transfers it will warp .Because of the fact you don't have a completely surrounded cylinder even with a heat type shrink fit the metal will not encompass the sleeve properly . One way to find out though .If it doesn't work you aren't out anything but your time because as it now it doesn't work .

 

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