mantis
ArboristSite Guru
Ok Please explain the differance between an outboard and inboard clutch.And how do you tell?Thanks guys
When you take the cover and bar and chain off:
Inboard:
you will see the sprocket (spur or rim) and the bell housing that covers the clutch. Everything (except the sprocket) is tucked into the power unit casing. To see the actual clutch you have to remove the sprocket and bell housing.
Outboard:
you will see the clutch shoes and springs, and behind that, the sprocket. The whole lot projects out from the power unit casing.
Or:
Stihl - all inboard (except the 020/200)
any other exceptions?
Also outboard clutch saws have the chainbrake mechanism built into the outside cover (the one you take off to get the bar and chain off)
011's
Thats my biggist grip about the 346xp...Outboard clutch...Just have to make sure the chain is seated good in the sprocket ..The 260 pro you can tell right off,,but the 346xp gotta look under,,and feel,pull the chain and make sure it's seated good..Not a big issue with me workin on the old Mcc's,,but I enjoy the inboards alot better...
I agree with you. It's also part of why it's so prone to falling over with just that much more weight hanging off the clutch side. On the contrary, I've seen some say that it contributes to why it handles like it does though.
Ok That is what I thought.Now isn't my 55 Rancer a outboard & my 385XP an inboard?
Next question is "Why" - inboard or outboard?
Of course the inboard make changing the chain so much easier, why would anyone make an outboard?
The obvious answer is to reduce the load on the crankshaft and bearing. The further out you apply the load (place the sprocket) the greater the load will be on the shaft and bearing. If you have a big, beefy shaft and bearing, no problem with the inboard clutch.
The old 80cc McCullochs are all set up with the inboard clutch. The higher power saws and gear drives are outboard. You really do have to adopt a completely different technique to remove and install a chain on those old direct drive saws.
Mark
Yes....
.
All of the old Stihl 070s, 090s and Contras were outboard. I'm guessing that it was a casting and design decision. Trying to shove that huge clutch inboard would be a bit of a problem, and it is another precision recess that has to be machined out. I find changing the chain a real pain on an outboard, particularly if you are wrestling with a big bar.
I don't know of any Stihls with outboard, and a chainbrake, except the 009, and the brake on that is a dog's breakfast.
Enter your email address to join: