How are you timing it? The worst way to time an old engine is with a light, as the vibration damper on the crank often moves on the rubber over time.
How are you timing it? The worst way to time an old engine is with a light, as the vibration damper on the crank often moves on the rubber over time.
Vacuum guage. Essentially, adjust to high vacuum. If you get a ping, back off in small increments until it stops.
Alternatively, you can either change the vibration damper, or pull a plug, turn the engine to TDC, and make a new mark on the damper to allow you to use the light.
I would just use the vacuum guage.
Vacuum gauge can get it close. short of replacing the balancer there is no way I know of to get it dead on the money. there is no timing chain, its gear to gear so that rules that out. I would imagine the carb is in pretty nasty shape internally, and minimum drain gas tank and replace fuel filter. There are lots of parts out there for that 250 performance wise if you know where to look. And even in stock form it will go just as fast as a 350, just takes a bit longer to get it wound up. Something else came to mind, the grease under the ignition module may have dried out, and your not getting a good ground. make sure the vacuum line to the advance is hooked to the correct port on the carb, and disconnected and plugged when setting timing (not trying to be insulting here, just not making any assumptions) Whitelightning
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