Very low hour saw, piston was damaged (too hot or too lean) so I have an OEM piston and cylinder/CC kit to go in it. I will have to wait for new seals before I begin reassembly.
Looking fwd to yr post on yr 66SV Mark. I just found the handle for my estate find from a few years ago. Had to pay up for it on ebay but havent seen one come up till now. I had it running a couple years ago but it was frustrating/difficult to continue pulling on it without a handle, so it was put up for later. With the handle attached, later is now. That one's in great shape.
Ahh back in the woods for the first time in almost like 2 months, the weather and schedule relented even if just for a day. Got the CS-590 dogs sunk into a 24" or so deadfall black locust which I thought had gone punky ages ago but its actually good firewood. The root ball is pulled up so theres all kinds of weird stuff to cut to get the remainder into a state where I can leave it and move on along the ridge. So, naturally, I had to run the nearly new chain thru dirty wood and twice hit some hidden fencing wire as a bonus. Tailgate sharpening is never really great so the 2nd half of the job was a slog, but still outside in the sun vs stuck behind a monitor is always a win.
But while it was cutting it did great, plenty of power so I could lever on the dogs and lots of chips. Its a bit heavy for the surgical fiddling needed on little stuff, so next time out I'll have the little saw too. The OEM chain seems a bit soft but I have a versacut loop ready to put on when its finished.
I like to take them down far enough for a thorough cleaning and inspection. To get the clutch off I had to modify an old spark plug socket into a clutch removal tool.
Reed valve induction, reed valves under the white intake block into the common crankcase.
I did not take many photos during reassembly, sorry. I did check both ignition coils and they were within specifications.
Crankcase passed pressure and vacuum testing.
Anyway, it's back together and runs, oiler works, I will try to find a better bar for display purposes and do a little more tuning/adjustment with a bar and chain on.
The spark plugs in the saw are NGK BPM7A (no "R" which I take it means no resistor) but the NGK website says the replacement is BPMR7A. Does anyone have insight as to how the resistor plugs might affect the performance in this saw? I have been lead to believe non-resistor plugs in saws with electronic ignitions could lead to ignition failures but this saw with electronic ignition is equipped from the factory with non-resistor spark plugs.