northernmerc
Chief Petty Officer
- Joined
- Apr 6, 2009
- Messages
- 401
This 2000 model year Johnson 30 two stroke starts fine. It also runs well at half or at full throttle, but only for a minute or so. It then loses power but does not stall. If the throttle remains wide open, it surges and momentarily tries to speed up but then again slows. It does this surging thing over and over until one eases up on the throttle. When it does this, it will idle fine, but won't move beyond an idle without surging.
After idling for a minute or so, or after turning the motor off for about thirty seconds, it again runs well - for a minute or two.
The fuel tank vent is wide open, the hose is new, and the fuel is fresh. Squeezing the primer bulb when it is acting up does not help.
Does this sound like a problem with the fuel system? What are the most likely things to check?
After idling for a minute or so, or after turning the motor off for about thirty seconds, it again runs well - for a minute or two.
The fuel tank vent is wide open, the hose is new, and the fuel is fresh. Squeezing the primer bulb when it is acting up does not help.
Does this sound like a problem with the fuel system? What are the most likely things to check?