Help!
I recently bought a small RIB with a 1994 Johnson 48hp. Motor runs fine up to full throttle but when I go to full throttlle (in the 4500 to 5000 rpm range)it surges until I back off a bit.
The fuel is fresh, tank is clean, hoses look good. spark plugs are very good, compression is good. I checked the screen in the fuel pump it's good. Carbs were rebuilt a few years ago.
Any ideas??????? Thanks in advance.
I recently bought a small RIB with a 1994 Johnson 48hp. Motor runs fine up to full throttle but when I go to full throttlle (in the 4500 to 5000 rpm range)it surges until I back off a bit.
The fuel is fresh, tank is clean, hoses look good. spark plugs are very good, compression is good. I checked the screen in the fuel pump it's good. Carbs were rebuilt a few years ago.
Any ideas??????? Thanks in advance.