Big saws 880 3120 etc

[agg221]

I think what happens is all the rubber components in the carb and fuel lines have a coating that keeps the supple . Petrol removes that coating but petrol itself keeps them supple . If you change to aspen after running petrol mix the aspen wont keep the rubber soft and so it cracks . If you run aspen from the start the coating stays on so no problem

 

Almost. It's actually the ethanol (alcohol) in the petrol that soaks right into the rubber, causing it to swell and reacting chemically with the structure that makes rubber flexible. The ethanol also keeps the rubber supple while it's present, but once it dries out the rubber goes hard and brittle.

 

Aspen doesn't have any alcohols in it, so doesn't cause the problem.

 

The problem is set to get much worse btw as the UK is following the US and allowing a much greater amount of ethanol in petrol, which will mean petrol degrades faster, and rots rubber components faster if left standing.

 

Alec

 

p.s. I use my 076 for felling larger stuff and the 076/070/090 for milling it, depending what size it is and what mood I'm in.

[mendiplogs]

088 47" & 36" bars. What a beast. Hasn't been out for a while but when it does make an appearance it certainly does the business.

 

When I've got bigger timber to ring up at the yard it gets used which not only gives it a chance to have a run but means the job is done in no time!!

 

 

advanced arborcare Ltd - Tree Surgeons Poole Home

 

HI PETE your right mate it very good on large timber fly into beech oak i love thanks jon

[woody paul]

Got a 3120xp when that go's out it makes life a bit easier. Used it to day to trim conifer stump of which was in a corner with fencing both sides no other way of cutting it stump measured 32'' across.

[harvey b davison]

Does anyone have experience of using the big makita / dolmar 9000 series. Are they any good.

[WoodED]

Does anyone have experience of using the big makita / dolmar 9000 series. Are they any good.

 

Powerful but over built in my opinion, the thing is like a tank, 3120 all the way

 

 

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[Chris Sheppard]

My 3120 has a choke . Not a primer bulb anywhere . Has auto oiler and extra manual oiler as well for the extra long bars

 

This one has the manual oiler too, but definitely no choke. Has a small primer (about where would expect chojke to be) that you have to pump til it sprays fuel onto the filter. It's a pain in the arse, though if it comes out a bit more regularly it's not half as bad to get going.

 

Until it's primed it absolutely won't go, and if you spray too much fuel and flood it then you may as well give up and come back to it later......

 

Dunno exact age but pretty sure it's 1990's - though it's still real tidy.

Edited July 1, 2013 by Chris Sheppard

[harvey b davison]

Powerful but over built in my opinion, the thing is like a tank, 3120 all the way

 

 

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would you say then that the 9000 series would make a good milling saw. thanks.

[WoodED]

Would be perfect on a 24" Alaskan yes, anything bigger is 3120xp/ms880 territory

 

 

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[harvey b davison]

Would be perfect on a 24" Alaskan yes, anything bigger is 3120xp/ms880 territory

 

 

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I was thinking for a 36 bar. thanks

[WoodED]

I'd personally go 30-32 at the most for milling

 

 

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