Mickeyluv

It's all back together at the moment. If I pull it back apart I'll do a video.

I've had my 039 from new and it's never been a good oiler - it just about managed with a 16" bar but with a 20" it runs just too dry for my liking. It's always used 1/2 tank of oil for every tank of fuel. Yesterday I decided to remove the pump and inspect it. For a good while now the adjustment stop has been broken off and I can see why - it's quite fragile and easily caught with a screwdriver blade. I just want to clear up my understanding of how it works; It appears that the pinion is integral with the pump shaft and when rotated moves from side to side to provide the pump stroke. The adjustment is just a rotating bar with and eccentric stop machined at one end. The position of the stop when rotated limits the stroke of the pump. At least this is how it looks - is this correct? With my pump I noticed a piece of plastic sticking out in front of the pinion at the opposite end to the adjuster. I pulled this out and it's about 1/2" long and is a piece of nylon detached from the drive gear and this limited movement. On the bench the pump now has strong pressure - you can't stop the oil flow even when turned by hand. I also made a note of the maximum stroke and the position of the adjuster, and scored a fine line on the pump body as a reference. However, even now it's back together and all lines good and clear, the chain still doesn't look like it gets enough oil. There's barely any fling off the end of the chain and it still runs 1/2 tank of oil to a tank of fuel.

So, the good guys are chainsdirect and chainsaw bars. Will get a refund and order from one of the companies recommended. There actually isn't any difference in price to what I paid.

Here's a picture of the chain I got off Ebay. It looks to be the older type as it hasn't got the dimples - though the one I thought I was getting had got them in the picture. It is stamped Stihl on every cutter. The fakers are moving in on everything and improving on some of the details that gave them away in the past, hence my suspicion.

Is there a way to identify whether a Stihl branded chain is genuine or not? I've just bought a chain and the picture was of a box with the part number (3621 000 0072) and dimensions printed on the box with a barcode label attached. However, the product I received is in a Stihl branded box but has no bar code and the dimensions panel is blank. There is nothing to identify the product other than a hand-written '20'. This seems more typical of the Chinese 'Genuine Stihl' chains where the dimensions are not printed, and it looks like I could have been the victim of a bait and switch scam. All the chains I've bought over the years from my farm shop have had all the information printed on the box and this is the first time I've bought online.