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    1999 JOHNSON 150 HP normal rpm operating range

    Does anyone know what the normal RPM operating range is for a 99 Johnson 150 carb motor? I can't seem to locate the info in my SELOC manual. Thanks!
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    Engine surging @WOT HELP!!!

    1999 Johnson 150 hp:D My boat/motor has been sitting for 2 yrs. Emptied out all the old fuel, rebuilt carbs, changed fuel filter, added new in-line fuel filter in addition to one on motor, replaced spark plugs, checked for good spark, and performed compression check. All cyllinders were 105...
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    1999 Johnson 150 Hp No Power @ Wot

    I've got a 99 Johnson that's really starting to drive me nuts! It has sat for the past 2 years due to work & high gas prices, but I'm trying to get her back in the water. I've already cleaned out all the old gas, installed new feul filter, rebuilt the 6 carbs, replaced the lower unit oil...
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    1999 Johnson 150 Hp Spark Plugs

    I am wondering, other than price, what's the difference between Champion plug types QL78YC and L78YC. My motor call for the QL, but I'd like to know what the difference is. Thanks!
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