husky 288 clutch differences

[husq2100]

ok so another older saw question....

what is the difference between the 2 husky 288 clutches:

503 47 18-01 up to serial number 4250001

503 70 15-01

reason I ask, is im building a 288 , unkown case date and crank is probably not original. So what are the physical differences or do they both run either?

 

[husq2100]

Should have asked what oil ratio to use.....

 

[Big_Wood]

Should have asked what oil ratio to use.....

lol, problem is the 288 is old and alot of guys don't know the 288. newer 288's used the same clutch as a 394. i have a neat old clutch i ran on a 288 but i think it's from a shindaiwa. worked great and still have it. i've owned alot of 288's and still couldn't tell you what you need to know. I think i remember the oldest ones having same clutch as a 2100 but updated to the better 394 clutch later on though.

 

[husq2100]

lol, problem is the 288 is old and alot of guys don't know the 288. newer 288's used the same clutch as a 394. i have a neat old clutch i ran on a 288 but i think it's from a shindaiwa. worked great and still have it. i've owned alot of 288's and still couldn't tell you what you need to know. I think i remember the oldest ones having same clutch as a 2100 but updated to the better 394 clutch later on though.

I'm not so concerned if one is better than the other, more so if I order and pay for one and it doesn't fit properly.

 

[Big_Wood]

Well, if you order one from a. Deaker you will likely receive the same clutch as a 394 which is better. Unless of course that particular dealer has some old stock.

 

[husq2100]

There are 2 different part numbers as I put in my first post. If it was a simple revised/updated clutch they would not continue to list the older clutch with the note of "up to serial number xxxx" that generally means there is a change in something other than the clutch.

Like for example they change fuel lines. I order the newer one but the hole in the tank is too big and I need the older one with flange at tank. The older one is still available for this reason.

 

[cus_deluxe]

Shouldnt be any fitment issues, just different arrangement of the spring/springs and clutch shoes, though i dont know if there were fine and coarse thread cranks either. I know thats the case between earlier and later 272's.

 

[marti384]

Look at the part numbers for the cranks or clutch drums, if they don't change, then the clutches should interchange. I have put together a few 181,281,288, and they all interchange

 

[rob066]

The older 288s had a different seal arrangement behind the clutch drum. It used a v ring and different other seals to keep most debris out of the oil pump. The newer 288s used a flange casted on the oil pump drive gear to keep out debris.

 

[husq2100]

ok so im going through all the ipls I have (1988,1988.2,1991,1993,1998 and 2000)

clutch 501 67 52-02 is up to 1988. It is the old type with one long continuious clutch spring right around the 3 clutch weights. Rim drum is 501 59 77-02 and oiler is small drive gear, V ring and plastic seal type

clutch 503 47 19-01 starts in 1991 and changes in 1998, is the newer 3 individual small spring type. Rim drum is 501 59 77-02 and oiler is small drive gear, V ring and plastic seal in 1991. In 1993 the oiler and drum change to the newer large, flanged, oil drive gear and drum 503 62 59-01

clutch 503 70 15-01 same 3 small spring type, 1998 to current? large, flanged oil drive gear and rim drum 503 62 59-03

Crank part # does not change through out.

NOTE: in my original post I noted that "503 47 18-01 up to serial number 4250001" THIS IS NOT THE CLUTCH, BUT THE CLUTCH SPRINGS!

There is also another note showing a change in the large, flanged plastic oil gear drive and the metal oil pump drive on pump shaft. "Up to 3350001" It also shows rim drum to suit which is 501 59 77-03. This tells me, within the newer oiler, there was a change to the 2 drive gears and hence a change in rim drum.....This doesnt make sense as the very first large flanged oil drive gear is the same part number from as soon as it first appears to 2000. Only showing the change in the last 2000 ipl??

Now the drum I have is just a oregon drum part # 28094. So I dont have the husky part number on it. I have no idea if there is any physical changes in the "husky" rim drums either clutch side or rim/oil pump side?

 

[husq2100]

since it is an old saw, I better post a pic so these young guys know what we are talking about...... but mine doesnt look that old

 

[idiotwithasaw]

Here is my 281, same as a 288 just a 52mm jug instead of a 54mm. I can't remember the clutch setup on mine.

 

[husq2100]

@spike60

any info appreaciated

 

[spike60]

No worries here, they are fully interchangeable. The change was mostly going to a common clutch spring with the 394 and 3120. The old part number supersedes up to the new one if you try and order it. Clutch was used on the 394 as guys have stated. It's listed as "up to serial number" whatever because someone just changing clutch springs would need to know that. But a whole clutch, just go with the newer 503701501 part.

 

[husq2100]

thanks @spike60.

do you think there is any physical difference in the large flanged plastic oil pump drive gear and the metal pump shaft drive gear that are listed as being "Up to 3350001" given they have different part numbers for the same parts from introduction in 1993 to date? This in the last page/s of the 2000-02 ipl

 

[spike60]

I think the reason for the gear change is to prevent the saw from oiling at idle. Same was done with a couple other saws around that time. There may or may not be some corresponding changes to the oil pump, but I'd need to check the SB's to find out, which I'll do tomorrow. Do the IPL's show any differences in the oil pumps?

 

[hseII]

I think the reason for the gear change is to prevent the saw from oiling at idle. Same was done with a couple other saws around that time. There may or may not be some corresponding changes to the oil pump, but I'd need to check the SB's to find out, which I'll do tomorrow. Do the IPL's show any differences in the oil pumps?

What is that beast in your picture?

 

[husq2100]

I think the reason for the gear change is to prevent the saw from oiling at idle. Same was done with a couple other saws around that time. There may or may not be some corresponding changes to the oil pump, but I'd need to check the SB's to find out, which I'll do tomorrow. Do the IPL's show any differences in the oil pumps?

Ok looks like the 2 part numbers at the back of Husky 288 ipl, 2000-02, referring to the plastic oiler drive gear and oil pump shaft gear "Up to 3350001" are in fact, just the original small plastic drive gear and corrosponding oil pump shaft gear. IE, pre 1993. What threw me was the illistration clearly shows the later, large flange plastic type and NO V ring or PLastic seal plate (which are needed behind the drum and sprocket on the older oil pump). Looks like the other parts are interchangeable as in adjuster screw, pump shaft, spring, washers etc. The other thing the old stile oiler needs, and not showen in this ipl, is the metal insert 503 49 50-01, that presses into the oiler body for the rubber V ring to seal around. This is not on the later, post 93 type, and the larger flanged plastic pump gear wont pass through it anyway.

While the illistrations are not super clear sometimes, they are usually fairly accurate in their shape, size etc and you can see changes in parts when there is a part number change (if its an actual change and notjust a part number revision) And for the above the illistartion it is clearly different, in the older IPLs up to 93 for the small type and 93 on for the large flanged type. They just used the same later oiler pic and changed the part numbers in the back of the 2000-20 ipl

 

[spike60]

Found the service bulletin documenting this change. Primary changes are the oil pump piston along with the gear, but the pump housing apparently also is changed. From the SB:

"Note--The new worm gear and the new pump piston do not fit old saws/oil pump housing. When purchasing a new oil pump complete, a new worm gear must be ordered separately."

So, it looks like the oil pump and gear have to be changed together, and of course you'd need the newer clutch drum to drive the new gear.

 

[idiotwithasaw]

The joys of tinkering with older saws, makes me wonder what my 281 has.