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1974 Johnson 115hp re-jet for elevation

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  • 1974 Johnson 115hp re-jet for elevation

    Hey guys, recently moved from Indiana (750 ft elevation) to Colorado where I am now at about 5000 ft. I have the carbs apart currently cleaning and putting in new seals and figured I should probably rejet since I am now about 4200 ft higher. My current jets are 30 and 67C. I've been struggling trying to find a good resource for determining what jets I should switch to. Also, I'm not super familiar with these carbs, not sure if both jets are for fuel (meaning I would want to reduce size for higher elevation) or if one of the jets is for air (meaning I would want to increase hole size for higher elevation. Any help would be greatly appreciated!

  • #2
    Does anyone have any insight on this? Thanks

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