What's on your bench today?

[Craigb]

[Craigb]

[spudulike]

Good job, the OEM case reassembly tool is a bit like your home made ones - better tan using the screws and risking damaging the thread.

You probably know but you need to "de-stress" the bearings once assembled, using your tools, it may not be necessary but you basically give each end of the crank a couple of belts with a copper mallet. This sorts out any stress in the bearings usually from using the screws to draw the cases together.

[Craigb]

3 minutes ago, spudulike said:

Good job, the OEM case reassembly tool is a bit like your home made ones - better tan using the screws and risking damaging the thread.

You probably know but you need to "de-stress" the bearings once assembled, using your tools, it may not be necessary but you basically give each end of the crank a couple of belts with a copper mallet. This sorts out any stress in the bearings usually from using the screws to draw the cases together.

Cheers. Are most saws the same on the crank and fly wheel? Eg is a 372 m10 and m8 fine thread? Are stihl the same? 
 

the crank got a couple of whacks with a copper mallet. I thought the same. I’m not thrutching a case together on six small bolts.

[spudulike]

I think most are different.

 

[pleasant]

Interesting one today....don't see many with the cause of this issue.

 

I will let you all have a go at diagnosing what the problem was in due course.........I have friends over this eve so will be dipping in and out when I can. A gold house point for the first correct answer.

 

Here we go:

 

It's a Stihl FS360C Cow-Handled brush cutter/clearing saw. Not overly old, but get a fair bit of use in a farm environment, so not 8 hours a day 5 days a week like the council, but more use than I would give it in my garden.

 

Customer wants us to service it and take a look at an issue it currently has which has got worse. It will start fairly easily, but will not rev up. It feels like it's holding back, with excess smoke via the muffler. Has been used this season- started season fine with no obvious issues. Been used a lot over the last few weeks to do the verges etc around the farm. Slowly started to struggle to rev up. Got out to use again this week and now still starts but revs so low it's unusable.

 

Initial checks show compression is very good, new spark plug, fuel filter and paper air filter all fitted as part of our service, but made no difference. Air filter was fuel mix contaminated, although being a paper element we would have changed that anyway.

 

Over to you guys........

Edited June 8, 2023 by pleasant

[Will C]

Partial seize due Neat fuel or a bit of 15w40 super universal instead of 2 stoke oil ( sorry only red as far as farm!)

[pleasant]

Nope

[Puffingbilly413]

40 minutes ago, pleasant said:

Interesting one today....don't see many with the cause of this issue.

 

I will let you all have a go at diagnosing what the problem was in due course.........I have friends over this eve so will be dipping in and out when I can. A gold house point for the first correct answer.

 

Here we go:

 

It's a Stihl FS360C Cow-Handled brush cutter/clearing saw. Not overly old, but get a fair bit of use in a farm environment, so not 8 hours a day 5 days a week like the council, but more use than I would give it in my garden.

 

Customer wants us to service it and take a look at an issue it currently has which has got worse. It will start fairly easily, but will not rev up. It feels like it's holding back, with excess smoke via the muffler. Has been used this season- started season fine with no obvious issues. Been used a lot over the last few weeks to do the verges etc around the farm. Slowly started to struggle to rev up. Got out to use again this week and now still starts but revs so low it's unusable

 

Over to you guys........

Ingress of seedheads or similar somehow getting into the carb/ fuel lines ?

 

A guess based solely on what it's been working on.

[pleasant]

Nope