spudulike

22 hours ago, sime42 said:

I'd be interested to see some pictures of that, if you ever fancy posting some pictures up.

 

Good family tree. I think Bulldog subsumed a lot of the old smaller old manufacturers too.

Just started a new thread on Antique Axes etc....fill your boots!!

I am getting a kick out of refurbing some old vintage English axes to make my own kindling for my own use. The history of the English tool manufacturing is interesting as most of it ended up as Spear and Jackson. It all started with my grandfathers Riley and Sons axe that is probably 100 years +.

S & J Family Tree.pdf

It is just an old rule of thumb, there will always be exceptions and views will always differ plus the chain type and kerf makes a big difference but it is round about right and gives some indication or a starting point for the uninitiated and that is all.

The relationship is the maximum bar length in inches is 1/3rd of the cc so 60cc is 20", 120cc is 40" etc. Generally, most will go for a smaller bar.....20" on a 70cc etc but this is just a basic rule.

Quite possibly. If the compression is through the floor, no but if the compression is on the low side, it may well fire cold and run then not restart when hot.

I would be looking at the compression and carb at first. I am guessing the saw won't start on the fast throttle start setting. This may be a poorly adjusted carb (low speed or idle), a carb issue (dirt, damaged parts), the choke not sealing correctly or a number of other carb related issues. Basically the carb isn't giving the saw enough fuel to start and that may be down to the carb, the compression or even a big air leak can cause it.

May be worth taking it to someone good at fixing kit. Generally a good one can tell in minutes if not seconds what the fault may be.

Have you checked the compression or viewed the piston through the exhaust port? Sounds like low compression to me. Most stone cutters are generally abused and stone dust isn't forgiving in bearings or the bore!