Hello everyone
I recently purchased an 66/80cc kit (called a Stinger) and mounted it on my old Schwinn Typhoon. The engine was working great for the first 1.5 tanks (I probably have put a total of 50 miles on the engine). Then it began to lose power until not I can't go up modest hills without pedaling. I checked the plug. It was black (a little oily). Also the end of the muffler was oily. So I assumed the fuel/oil ratio was wrong. The following had basically no effect on the performance of the engine
1. Kicked up the gas to oil ratio to 32:1 even though the manuel recommends 20:1 after the engine is broken in.
2. Reset the "e" clip on the throttle to the highest notch (i.e. farthest from the pointed end of the the needle valve) Tried the clip on 3rd notch as well
3. Cleaned the carb main jet and fuel intake (the one the float operates) several times.
4. Tried a different (new) plug (recommended type) and CDI.
5. Checked exhaust port for clogging
6. Checked intake manifold for obstructions
7. Bought new and higher octane (91%) gas. The original gas I used had 10% alcohol added).
The manuel that came with the kit says one should replace the magnet if power is low. The magnet seems to have a strong field and I just can't believe a magnet could "go bad" in the space of a few hours. The engine never did idle without dying even though I tried the idle screw at various locations. The engine however did run fine (really good) for the first 1.5 tanks. I'm really run out of things to try and was thinking of replacing the rings. ANy ideas on what else I could try?
I recently purchased an 66/80cc kit (called a Stinger) and mounted it on my old Schwinn Typhoon. The engine was working great for the first 1.5 tanks (I probably have put a total of 50 miles on the engine). Then it began to lose power until not I can't go up modest hills without pedaling. I checked the plug. It was black (a little oily). Also the end of the muffler was oily. So I assumed the fuel/oil ratio was wrong. The following had basically no effect on the performance of the engine
1. Kicked up the gas to oil ratio to 32:1 even though the manuel recommends 20:1 after the engine is broken in.
2. Reset the "e" clip on the throttle to the highest notch (i.e. farthest from the pointed end of the the needle valve) Tried the clip on 3rd notch as well
3. Cleaned the carb main jet and fuel intake (the one the float operates) several times.
4. Tried a different (new) plug (recommended type) and CDI.
5. Checked exhaust port for clogging
6. Checked intake manifold for obstructions
7. Bought new and higher octane (91%) gas. The original gas I used had 10% alcohol added).
The manuel that came with the kit says one should replace the magnet if power is low. The magnet seems to have a strong field and I just can't believe a magnet could "go bad" in the space of a few hours. The engine never did idle without dying even though I tried the idle screw at various locations. The engine however did run fine (really good) for the first 1.5 tanks. I'm really run out of things to try and was thinking of replacing the rings. ANy ideas on what else I could try?