- Joined
- Feb 13, 2012
- Messages
- 60
I have repaired small engines for over fifty years.
Now I mainly work on small two stroke equipment.
Some time back, I bought a Tanaka chainsaw that would not oil the chain. I discovered the plastic drive gear was damaged and only available with complete pump assembly and was over $140.00 !
Upon inspection, I decided to try an repair plastic worm gear. I had other photos but can't find them. Only photo shows specially ground bit picking up thread profile and pitch.
I made an aluminum gear and pressed it onto the plastic assembly after removing damaged outer thread.
Still working beautifully!
It took a lot of figuring and close machining, but it worked beautifully.
Now I mainly work on small two stroke equipment.
Some time back, I bought a Tanaka chainsaw that would not oil the chain. I discovered the plastic drive gear was damaged and only available with complete pump assembly and was over $140.00 !
Upon inspection, I decided to try an repair plastic worm gear. I had other photos but can't find them. Only photo shows specially ground bit picking up thread profile and pitch.
I made an aluminum gear and pressed it onto the plastic assembly after removing damaged outer thread.
Still working beautifully!
It took a lot of figuring and close machining, but it worked beautifully.