Cylinder and piston kit

[wayne 4098]

I have bid on a cylinder,piston for dolmar 309 .It says new old stock.Are piston sizes stamped on pistons?Would there be a way of telling if its old dolmar stock or a replacement part ?Also the cylinder looks used on the outside.I am collecting it on Saturday , dont want to pay if used.Can u tell by looking at the cylinder if new?Thanks

[spudulike]

I have bid on a cylinder,piston for dolmar 309 .It says new old stock.Are piston sizes stamped on pistons?Would there be a way of telling if its old dolmar stock or a replacement part ?Also the cylinder looks used on the outside.I am collecting it on Saturday , dont want to pay if used.Can u tell by looking at the cylinder if new?Thanks

 

Many Stihl and Husky Cylinders are manufactured by Mahle and this name will be moulded in to the cylinder above the base, I am not sure who manufactures the Dolmar ones.

 

Generally the top of the cylinder will have a letter A/B/C on the plate on the top of it denoting the final bore size and the piston that should be fitted.

 

The ports will have a very clean finish and bevel to them and the bore will have a decent finish and have diagonal honing in it.

 

The piston will have machined and not moulded inside flanks where the small end fits in to it. It will be finished with no rough flash from the manufacturing process.

 

The top of the piston will have something a bit more than an arrow on it, generally a manufacturers mark.

 

If the box is pure white, it is Chinese.

 

I am not that familiar with Dolmar but generally the fit of the piston in the bore is pretty poor on aftermarket kit and the cylinder bottom has the original rough casting finish and hasn't been machine turned on finishing!

 

I did look at the listing and he doesn't list it as an OEM part:blushing:

[jamesd]

Sorry to hijack this thread a bit but where do you normally buy your spares from spud? I sometimes struggle to get hold of certain parts (like pistons) from my local supplier.

[spudulike]

Sorry to hijack this thread a bit but where do you normally buy your spares from spud? I sometimes struggle to get hold of certain parts (like pistons) from my local supplier.

 

L&S Engineers, Garden Hire Spares, Green Stripe and ebay are normal places and can get most of the general spares for Stihl/Husky from one of these.