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  1. M

    Tricking the Yamaha 2 stroke

    on my 90hp 80s model Yamaha I need to switch to 50 to 1 mix, but don't want to undo all the mechanicals. If I simply disengage tthe oiler advance lever that opens up the valve to the inside the cowling oil supply for more oil when throttling up. won't that simply allow the unit to continue to...
  2. M

    1985 Yamaha 90HP two stroke with oil injection

    I bought an old boat for the 90hp outboard and aj putting it on another boat. It has oil injection and the oil sits inside the cowling. I ran it before pulling it, and it ran pretty nicely. However, now that I am putting it on another boat, I hooked up the electric starter cable and the main...
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