Johnsondawg
Well-known member
David,
I did a little experimenting this evening. First, I went for a drive for about 30 minutes and checked the plugs. The plugs looked clean but had a very light carbon film around the base. I had also noted that I was getting excessive carbon and moisture out of the tail pipe and some black smoke when the engine is under heavy load ( Backing against a parking block) . I decided to try the 63 jet as suggested and opened up the carb to make the change from the 70 jet. When I opened the carb I found that the current 70 jet was not screwed in all the way. It was so loose that i was able to easily unscrew it by hand with one turn. I'm assuming that extra fuel has been passing around the loose jet causing it to run richer. Knowing that I still tried the 63 jet. I ran it for a short drive and it felt like it had a bit of a stutter around 40 miles per hour so I backed off. I have decided to try the 70 jet again. Obviously, I screwed it in securely this time. I'll run it like this to see if the loose jet was part of the problem. I expect it will still be too rich and that I'll probably need a jet sized between the 63 and the 70. Any suggestion on where to start? Is Pony carbs the only source for jets? It would be nice if I could purchase them locally but I highly doubt that's an option. I'll let you know if tightening the jet has any effect and I may also try the 63 again when I have more time to test it.
I did a little experimenting this evening. First, I went for a drive for about 30 minutes and checked the plugs. The plugs looked clean but had a very light carbon film around the base. I had also noted that I was getting excessive carbon and moisture out of the tail pipe and some black smoke when the engine is under heavy load ( Backing against a parking block) . I decided to try the 63 jet as suggested and opened up the carb to make the change from the 70 jet. When I opened the carb I found that the current 70 jet was not screwed in all the way. It was so loose that i was able to easily unscrew it by hand with one turn. I'm assuming that extra fuel has been passing around the loose jet causing it to run richer. Knowing that I still tried the 63 jet. I ran it for a short drive and it felt like it had a bit of a stutter around 40 miles per hour so I backed off. I have decided to try the 70 jet again. Obviously, I screwed it in securely this time. I'll run it like this to see if the loose jet was part of the problem. I expect it will still be too rich and that I'll probably need a jet sized between the 63 and the 70. Any suggestion on where to start? Is Pony carbs the only source for jets? It would be nice if I could purchase them locally but I highly doubt that's an option. I'll let you know if tightening the jet has any effect and I may also try the 63 again when I have more time to test it.