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Recent content by Marmotic

  1. M

    6hp yamaha 4 stroke missfiring/shaking at higher rpm

    I took it to a marine engine shop since im a newbie Apparently everything is alright with the engine. The excessive shaking seems to be the rev limiter according to the shop. I was just perpelxed because this rev limiter in neutral already happens at 50-60% throttle! I just got my inflatable...
  2. M

    6hp yamaha 4 stroke missfiring/shaking at higher rpm

    Is it something similar to this? an extended wire with a gap in the middle where you can see the spark travelling towards the spark plug? Otherwise i dont really understand the contraption in the pic from you Edchris. heh :oops:
  3. M

    6hp yamaha 4 stroke missfiring/shaking at higher rpm

    Hi racerone I dont have a testing device. Is there any way i can test it or should i just replace the spark plug? Im in Switzerland and the parts avaliablity is a joke. right now i have a ngk spark plug, is there any better one? I already ordered a new fuel filter from china, not sure...
  4. M

    6hp yamaha 4 stroke missfiring/shaking at higher rpm

    i noticed the fuel i used from the old owners external tank is a bit old (over 1 year at least) I emptied the old fuel in the engine and filled it with new fuel and ran it for 15 minutes in idle and neutral. but it doesnt look like it improved much. Over 50% throttle the engine feel like its in...
  5. M

    6hp yamaha 4 stroke missfiring/shaking at higher rpm

    Model: Yamaha F6CMHS I bought a used yamaha 6hp outboard for my tender. It works great until 50% throttle, but when i go to 60% it doesnt sound as good anymore. (ut still runs okay-ish) Above 60% the engine sometimes cuts out and appruptly shakes until i remove some throttle. (it seems like its...
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