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  1. Virginian

    Yamaha stumbles at high rpm

    Four stroke 225 2005 I know that seafoam can be used in conentrations up to 50/50. The motor did not smoke much and ran and idled better after treatment. I think using a can in a gallon of gas was probably more in line with recommendations
  2. Virginian

    Yamaha stumbles at high rpm

    Clarify 1 gallon of gas with 1 gallon of seafoam in a seperate tank with gas line running from it. Idle through 3000 rpm for 10 minutes. Rest for 20. Repeat until all fuel is gone
  3. Virginian

    Yamaha stumbles at high rpm

    I have a Sea Hunt with a 2005 Yamaha 225 Motor has been bulletproof for years. This spring motor idled rough and would stumble onto plane. Replaced fuel, fuel / water seperator,ball, initial fuel filter were line enters motor. Ran 50/50 mix sea foam to fuel mix through motor. Currently the...
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