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15 HP 2 stroke 2005 Yamaha outboard will not run at low speed
15 HP 2 stroke 2005 Yamaha outboard will not run at low speed
2005 15 hp 2 stroke Yamaha will NOT run at low speed. Have changed the 3 jets , installed carb kit, soaked carb in cleaner for 3 days. Has spark, runs great at high speed.
What next?
At a loss
Capt. Jack
Last edited by ceeteemar; 04-21-2017, 07:34 PM.
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2005 15 hp 2 stroke Yamaha will NOT run at low speed. Have changed the 3 jets , installed carb kit, soaked carb in cleaner for 3 days. Has spark, runs great at high speed.
What next?
At a loss
Capt. Jack
Take carb apart again and blow out all passages with compressed air. Take a piece of stranded copper wire and make sure you can pass it thru all passages. Sometimes crap in the real small holes will only come out with wire poking. And also as noted check the fuel pump diaphragms or just replace them..they are cheap.
The fuel pump three black diaphragm pieces were changed. The three brass valves and the float valve were changed. Everything that could be removed from the body of the carburetor was removed before soaking in cleaner. The compression is good. The plugs were changed. The top one looked normal but the bottom one was almost black with oil residue, not carbon deposit.
Ceeteemar
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