Hi,
I have an old DT 9.9 2-stroke that has recently developed a problem:
It starts easily as long as the choke is open and the throttle fairly high. Choke goes in immediately after starting.
It will keep running as long as the revs are quite high (> around half-way on the throttle). Nowhere even close to what might be described as idling.
If I turn down the throttle below about 1/2-way, it will drop in speed and die. Quickly turning up to full throttle will (usually) make it pick up again as long as it hasn't gone below some critical speed.
If I hold the throttle motionless above the minimum where the motor keeps running, the engine revs do not stay constant: it sometimes speeds up suddenly before dropping again.
I'm fairly clueless where engines are concerned unfortunately, but would welcome suggestions about what the problem is likely to be, and what I can do to further diagnose/fix.
Thanks for any help,
David
I have an old DT 9.9 2-stroke that has recently developed a problem:
It starts easily as long as the choke is open and the throttle fairly high. Choke goes in immediately after starting.
It will keep running as long as the revs are quite high (> around half-way on the throttle). Nowhere even close to what might be described as idling.
If I turn down the throttle below about 1/2-way, it will drop in speed and die. Quickly turning up to full throttle will (usually) make it pick up again as long as it hasn't gone below some critical speed.
If I hold the throttle motionless above the minimum where the motor keeps running, the engine revs do not stay constant: it sometimes speeds up suddenly before dropping again.
I'm fairly clueless where engines are concerned unfortunately, but would welcome suggestions about what the problem is likely to be, and what I can do to further diagnose/fix.
Thanks for any help,
David
Comment