1979 Homelite Super EZ Automatic rebuild questions and help

[melonboi1]

I am rebuilding My Super EZ Automatic and Have some questions. 

1: is there a ring gap?

2: is it all crucial and stuff to torque the cylinder and stuff to specs? If so the how do I do it?

3: Is there anything I should know about rebuilding one of these?

[onlyhomelites]

Start on page 27 of the service manual: www.leonschainsawpartsandrepair.com/uploads/3/9/7/9/39792537/homelite_chainsaw_service_shop_manual_4th_edition__pages_1-76_.pdf

Feb 20, 2024 14:51:48 GMT -5 melonboi1 said:

I am rebuilding My Super EZ Automatic and Have some questions. 

1: is there a ring gap? .006 to .016

2: is it all crucial and stuff to torque the cylinder and stuff to specs? If so the how do I do it? Manual says 100 in/lbs. I go with tight using a standard hand wrench.

3: Is there anything I should know about rebuilding one of these? Loaded question, but no there isn't any major surprise. Everything is compact, so work areas are tight on space. Go slow, clean everything as well aas you can and you'll be fine.

[melonboi1]

Thank you

[melonboi1]

Also, I notice the old wrist pin has a hole in one end and the other is solid, I have red the oprn end faces the recoil as with the ring gap also, however the new wrist pin doesn’t have a solid end, it is open at both ends but the problem is that I am reusing the old wrist pin with the new piston and it seems to be too long so one wrist pin clip will go and fir in but the other won’t go in it’s groove and that can’t be right. What should I do?

[onlyhomelites]

You must be using an aftermarket piston based on your description...the OEM retainer clips won't work.

[melonboi1]

Mar 3, 2024 8:10:07 GMT -5 onlyhomelites said:

You must be using an aftermarket piston based on your description...the OEM retainer clips won't work.

But is it ok if I use the new wrist pin with a hole through it? Also I test fit both new and old piston into the cylinder and they both play SO much, is this normal?

[xl130]

In my experience the wrist pin should be a tight fit in the piston. In fact often you need to heat the piston slightly to get the wrist pin to slide in. If it’s flopping around that’s not ideal. I have also never seen an open ended Homelite wrist pin. I would strongly suggest thinking twice about using that kit that you bought and search for a better aftermarket or OEM part.

It’s a gamble. Maybe it would be ok , but maybe it will ruin the cylinder due to excessive play.

[melonboi1]

Yes but what I am confused on is the fact that it ran very well before with no issues but when I put the piston in the cylinder it plays A LOT.

[melonboi1]

73117348798__360A4718-21A2-40D5-BBFA-BB3F0C....MOV (2.1 MB)

[melonboi1]

What I didn’t mention is that the cylinder I plan to use is a NOS one, it matches the part number from the IPL. I can test fit it with the old cylinder but I HIGHLY doubt it will make a difference.

[5terrysupersaws]

  Definitely excessive clearance between the piston and cylinder. 

  Measure the pistons. A Super EZ piston is 1.5625"

  Ideally the clearance should be around .002" . As a quick test, plug the sparkplug hole with your finger and
  drop the piston into the cylinder bore, if it hits bottom without any resistance .. clearance is excessive.

[blythkd]

Yeah, definitely agree, that's not right.  It's like you're mixing and matching EZ and SEZ parts maybe?

[melonboi1]

Mar 3, 2024 14:08:57 GMT -5 blythkd said:

Yeah, definitely agree, that's not right.  It's like you're mixing and matching EZ and SEZ parts maybe?

I will test fit it in the old cylinder then.

[melonboi1]

Hmm… Something really fishy is going on here, it fits just fine in the old cylinder no play, but the part numbers match, I do notice cross hatching in the “new cylinder” do you think the person selling it honed it and I got scammed? It just doesn’t seem likely…

[blythkd]

Better get some measurements and go from there.

[melonboi1]

Mar 3, 2024 21:04:02 GMT -5 blythkd said:

Better get some measurements and go from there.

Yeah but why would the part numbers match but the cylinder be too big?

[blythkd]

If you're talking about a number cast into the side of the cylinder, that's a casting number that typically does not match the actual part number.

[melonboi1]

Mar 3, 2024 21:17:28 GMT -5 blythkd said:

If you're talking about a number cast into the side of the cylinder, that's a casting number that typically does not match the actual part number.

yes but it matches the part number from the IPL both the part numbers match! Why wouln't they fit!?

[blythkd]

What's the part number? 69737?

[melonboi1]

A-67874-A