The photo above sort of let's the cat out of the bag but in the process of working on this saws I noticed the flywheel was a 12 fin rather than the 20 fin that should be on an 850. Just a bit more evidence that this saw had been tinkered with at the factory. Another trip to the attic and I found a suitable 20 fin flywheel.
Coil installed (just a normal electronic ignition coil), I use a 0.010" feeler gauge to set the clearance and tighten everything down. If you look carefully at the back edge of the fuel tank/air box you can see scratches from a screwdriver installing the top/rear screw that holds the flywheel cover in place. One more piece of evidence how this saw has been worked on before.
Speaking of which, I had to add a couple of holes in the flywheel cover. I made a couple of templates some while back to help position the holes in the right location.
In the interest of full disclosure, I still had to file a bit to get the holes lined up so the screws would go in. That said, I had to file the front one as well indicating the new block was slightly different from the original.
Mark
Coil installed (just a normal electronic ignition coil), I use a 0.010" feeler gauge to set the clearance and tighten everything down. If you look carefully at the back edge of the fuel tank/air box you can see scratches from a screwdriver installing the top/rear screw that holds the flywheel cover in place. One more piece of evidence how this saw has been worked on before.
Speaking of which, I had to add a couple of holes in the flywheel cover. I made a couple of templates some while back to help position the holes in the right location.
In the interest of full disclosure, I still had to file a bit to get the holes lined up so the screws would go in. That said, I had to file the front one as well indicating the new block was slightly different from the original.
Mark