4hp Johnson issues??
4hp Johnson issues??
Hi all. I’ve just fired up an old (1978) Johnson 4hp after 15 years. Starts immediately and runs well...EXCEPT, the throttle won’t hold. When I pull on the lever to rev it up it just slips back to ‘stop’ until it cuts out. The only way I can keep it running it to physically hold the throttle in place. Any ideas on where to start?
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russellh2
- Rank: Australian Salmon
- Joined: Fri Jul 31, 2015 7:35 am
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Re: 4hp Johnson issues??
Check "Idle control screw" on Carburetor - Adjust 1/4 turn to increase Idle - Also check if there is a throttle lever "Stop adjustment screw".
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russellh2
- Rank: Australian Salmon
- Joined: Fri Jul 31, 2015 7:35 am
- Has liked: 1 time
- Likes received: 38 times
Re: 4hp Johnson issues??
Go to Utube and search for "JOHNSON 4 HP ( FIXED )" - Very interesting video regarding Idle/ Throttle control as well as Choke function.