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You just wouldn't use one of the tubes
Sometimes looks like 393776
MERCRUISERII-TR 1973-1976
Mercury Quicksilver
And All other parts pictured in this assembly in this assembly
MerCruiser 43-18411A2 Upper Unit Gear Set V8 305 350 1.50:1 Alpha One Gearcase steering wheel You just wouldn't use oneItem Details The gears are For All V8 applications for Pre Alpha R MR ALPHA ONE Gen 1, so 1970 1990 as a general rule. (Actually these were also used on Gen II drives 1991 1997 but you would have to swap out the shafts and bearings) The gear set here is MerCruiser 43 18410 43 18411 1 > 43 18411A2 (Also Equivalent to Sierra 18 2202) 20 22 (tooth count) 1. 50: 1 1. 47: 1 Ratio for V8 GM Chevy 5. 0L 305 & 5. 7L 350 sterndrive engines. (Early Ford as