Jump to content

Log in or register to remove this advert

Recommended Posts

Posted
ok guys, the saw gets what the saw needs, i'd be happy with the stock items fitting either, is it worth getting done soon or waiting for the problem to show itself with poor running? it runs sweet at the mo. Ed

 

It is a simple one - if your saw has 150 psi compression or over then it is good. If it is under that then a new piston will probably bring it back in to order, inspection of the plating will decide if the cylinder/jug needs replacing.

 

The only exception I have found to this has been an old vintage Poulan Countervibe that ran at 130PSI and this is generally where a normally running saw of this manufacture sits - many owners on Arboristsite.com verified this.

 

175psi on a newish saw is normal

Log in or register to remove this advert

  • Replies 38
  • Created
  • Last Reply

Top Posters In This Topic

Posted
in that case i'd better check the compression and the plating. thanks man, i might be able to lay my hands on a compression testing device tomorrow:thumbup1:

 

I use a gunson one, gives sensible readings that work for me i.e. new saw - 175psi, older saw - 150psi and fubared saw - 100 - 130psi:thumbup:

 

Poor mans compression check, raise the saw and let it drop holding on to the start handle - 10 - 15 seconds fall is good - 3 seconds and you have a buggered saw:thumbdown:

Posted

Nice collection, which is sure to grow.

Do you think the fuel these days has got a shorter shelf life than pre lead free stuff (like when it was 35p per gallon)

For all you young uns, thats just under 5 litres!!!!!!!!!!

Posted
Any big bore kit has to be purchased complete - the original bores on saws built mid 70s onwards have plated bores with Chrome being on the older saws and Nikasil on the newer ones - only cast iron liners can be bored out.

 

Some of the US guys do big bore kits - Baileys are one of the companys but they charge $$$$$ for delivery to the UK!

 

Cost of fitting a P&C kit (customer supplied) - around £75 and will include a pressure check and tach tune to the carb.

 

£75 how much an hour is that?

Posted

Around £25 - £30, I have just done a couple of saws recently - one had a dealer fitted seal that was turned inside out when the cases were split and a new P&C were fitted and had then seized and the other a split impulse line that took out the piston.

 

Many people can throw a P&C on a saw but few make sure the saw is set up right and the route cause is found and resolved.

 

What would you charge for similar?

Posted

Oh - and invariably I do a lot more on top and don't charge - like give the saw a good clean and check the carb over including a rebuild - but you know the score, it is rare where you do one particular job without doing three more!

Posted

:thumbup:Spud does a top job, I had given up hope of finding a decent saw mechanic they either have it for months then charge the price of a new saw or say it's unfixable.. He's currently fixing a load of broken bolts and other bits on my 372 that my dealer said would be impossible to fix so I might as well buy the 441 on the shelf! The 357 I gave him a month ago now starts first pull and runs sweet... Worth every penny!

Posted
pressure checking the engine

 

Can you elaborate on this? I have a nice old saw that I suspect the crank seals have failed on... it goes like billio but when coming off the revs tries to die at the bottom and splutters before hand. Carb was tuned recently...

 

Air leak - same thing? Ta.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  •  

About

Arbtalk.co.uk is a hub for the arboriculture industry in the UK.  
If you're just starting out and you need business, equipment, tech or training support you're in the right place.  If you've done it, made it, got a van load of oily t-shirts and have decided to give something back by sharing your knowledge or wisdom,  then you're welcome too.
If you would like to contribute to making this industry more effective and safe then welcome.
Just like a living tree, it'll always be a work in progress.
Please have a look around, sign up, share and contribute the best you have.

See you inside.

The Arbtalk Team

Follow us

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.