rjm240
ArboristSite Lurker
All,
I have been a long time lurker on this site but have not done much posting. I finally am going to refab an old saw. I have my dad's old rancher 44 white top. I believe it is a 1979 build year.
I started by getting the saw running and tuning it to 2 stroke in the cut. I don't have a tach but it seems about right, Might be a tad rich.
Just to see what I was up against I pulled the muffler to check the piston and cylinder. They don't look perfect, I can see some wear but I dont have enough experience to even know what too much wear looks like. I see where the bottom of the piston is shiny. I then did a compression test. It is right about 115 PSI. (I didn't get a photo of the piston or cylinder)
Here is where I need some help. I know the saw has a ton of hours on it. My dad cleared the land to build our house and then he proceeded to cut 3-4 cords of wood every year for 30 years with the saw. He replaced it with a MS-250 about 10 years ago and it has been sitting pretty much since.
Should I try to find a new piston for it? Is there a runout on pistons... should I try to measure the skirt? Have any of you seen this https://www.lilredbarn.net/product-p/pkhu44-42mm-top-end-kit.htm? Everyone says pistons went our of production on these 10 years ago but this place seems to have some? Is it worth it to try and put one in?
Or should I just run it?
Also, the spark plug seems to be hitting the piston. It is a BPMR7A. I believe it should have a BPMR6A but the difference in temp shouldn't impact it hitting the piston should it? Any tips on what plug I should put in there? Why would this one hit the piston?
I have been a long time lurker on this site but have not done much posting. I finally am going to refab an old saw. I have my dad's old rancher 44 white top. I believe it is a 1979 build year.
I started by getting the saw running and tuning it to 2 stroke in the cut. I don't have a tach but it seems about right, Might be a tad rich.
Just to see what I was up against I pulled the muffler to check the piston and cylinder. They don't look perfect, I can see some wear but I dont have enough experience to even know what too much wear looks like. I see where the bottom of the piston is shiny. I then did a compression test. It is right about 115 PSI. (I didn't get a photo of the piston or cylinder)
Here is where I need some help. I know the saw has a ton of hours on it. My dad cleared the land to build our house and then he proceeded to cut 3-4 cords of wood every year for 30 years with the saw. He replaced it with a MS-250 about 10 years ago and it has been sitting pretty much since.
Should I try to find a new piston for it? Is there a runout on pistons... should I try to measure the skirt? Have any of you seen this https://www.lilredbarn.net/product-p/pkhu44-42mm-top-end-kit.htm? Everyone says pistons went our of production on these 10 years ago but this place seems to have some? Is it worth it to try and put one in?
Or should I just run it?
Also, the spark plug seems to be hitting the piston. It is a BPMR7A. I believe it should have a BPMR6A but the difference in temp shouldn't impact it hitting the piston should it? Any tips on what plug I should put in there? Why would this one hit the piston?