My Pioneer 1073
I recently had a Pioneer 1073 given to me by an old farmer who had it kicking around. His son had it running a couple years ago and was about to throw it away, instead it was given new life by a first time chainsaw owner.
I hadn't done much in terms of mechanical repair before owning my chainsaw, other than some light automotive work on my own vehicle. I have lots of patience and experience with other small detail work, so I figured I would dive into getting this old Pioneer running.
When I got it, the first thing I did was dump the fuel and checked for spark. Spark was good, so I popped out the plug and found the compression to be decent (no tester so all I could go with is that it has good suction/puffing when I put my thumb over the hole). With some fresh fuel in the tank and a little bit of 50:1 mix squirted in the carb, I was able to get it to fire and run for a second or two. At that point I figured I'd go ahead and start spending money on getting it running nicely.
I replaced the spark plug with a new NGK BM7A. I managed to find a new air filter for it on eBay (part# 430520), and
thanks to the generosity of Big Dan, I installed a new fuel filter (Oregon # 07-206). With all that done, it still wouldn't stay running more than a second or two.
After reading the
Tillotson HU Series service manual I felt confident enough to tackle rebuilding the carb, so I ordered a carb kit (Oregon # 49-805). Rebuilding it took me about 2 hours and I must say I really enjoyed it, it was a nice change for a computer guy to go inside of a chainsaw carb and bring it back to life.
With the carb cleaned and back together with new diaphragms and gaskets, I tried to start the saw and to my delight it roared to life. Now I had another problem to tackle: the sticky starter recoil. I would get one good pull at it, then had to feed it back in painstakingly for the next pull.
I took the starter recoil off, completely disassembled it and cleaned everything with brake cleaner. Thanks to a slick YouTube video, I discovered
the nail trick which made assembly of the recoil a lot more manageable. I installed a new length of Stihl brand rope and after many rebuild attempts I was finally happy with the quick and snappy recoil I had brought back to it's original glory.
I put the starter pinion back on, installed the rebuilt recoil on the saw and gave it a pull, and the same thing happened. Upon closer inspection the yoke on the starter pinion was sticking, not allowing proper retraction of the rope. I used some graphite lubricant (normally for locks) and it worked like a charm. Now the recoil snaps back in just like a brand new saw.
After all that work, I'm proud to say it starts and runs beautifully. Last week I did some final carb adjustments with the air filter cover on, it now idles beautifully, chain oils like it should and all I can say is this is one nice little saw. I'm really proud of the work I've done on restoring this saw to running condition. I can't wait to cut some wood with it!
Here are some pics of my saw:
Right after I took those pics I tried to start it (hadn't been running since last Tuesday) and it fired to life on the first pull. Gotta say it sure brought a smile to my face.
Of everything I looked at while I had this saw apart, the neatest thing I think is the little tiny bolts that hold the model tag on. They are actually little tiny hex cap screws that thread into the starter recoil body. They are the tiniest hex cap screws I've ever seen, that's for sure!