372xp loss of power

[ballibeg]

Saw just off the boil yesterday. Changed fuel, no help. Just not holding revs as high as it did and a bit of burble to it.

 

My local guy has a back log so any tips to check first?

[TreeswingerPerth]

I had similar stuff with mine a while back , cleaned the carb , put a new fuel filter in , still the same . Last chance saloon , changed the plug and off she went .

[ballibeg]

I was thinking along those lines. He'll have those in stock. The saw's earning again Thursday. I don't do enough to justify running 2 saws for times like this.

[spudulike]

If it is an ex Torque, they do go through fuel lines and it can seize them so check this thoroughly.

 

Other than that, check the carb internal gauze filter, a common fault and the plug is an easy one to change.

[ballibeg]

Many thanks.

 

Been at it in the workshop and it looks like oil has got into clutch area. With saw assembled and running oil comes out of top of chain Brake/clutch cover. It looks like it then spread back over clutch. Bar oiling hole clear and plate clean and straight. All I can think is it's the small black rubber seal (red arrow) that's allowing oil back and past to yellow arrow area.

 

Chain looks like it's lacked oil and certainly looks oil contaminated on brake area. Am using Stihl chain oil which is lighter and thinner than three husky stuff I used to use.

[ballibeg]

Expert had told me I'd sharpened the chain with too much hook causing chain to bite too much and clutch to slip.

 

I've just finished reprofiling cutters. We'll see.

[adw]

Behind the sprocket and clutch is the other end of that brass tube, it sits into a small rubber boot and then into the pump delivery, it may be leaking here if the rubber boot has split, be aware the clutch will be murder tight.

[Stubby]

Behind the sprocket and clutch is the other end of that brass tube, it sits into a small rubber boot and then into the pump delivery, it may be leaking here if the rubber boot has split, be aware the clutch will be murder tight.

 

Clutch is a simple C clip and slide strait off on a 372 surely ? The drum I mean then a tap with a drift and off it spins .

[adw]

No Stubby, the sprocket is a washer and c clip, the clutch is spun onto the crank, and believe me they can be tight, it is a l/h thread, you need to remove it to get to the oil pump.

[Stubby]

No Stubby, the sprocket is a washer and c clip, the clutch is spun onto the crank, and believe me they can be tight, it is a l/h thread, you need to remove it to get to the oil pump.

 

So exactly what I said only we differ on the amount of " tap " you godda give it . I have never had a problem and always found compression enough to tap it with an ally or copper drift and spin it off .