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  1. F

    Right ss prop for 40hp/16ft. Have testing data

    Hello and thank you for reading I have a 1990 mariner (yamaha built) 2 cyl 40hp, mounted on a light 16ft mod v flat bottom. The engine has been moved up on the transom so the caltivation plate skims the top of the water over 4000rpm light load, *and runs 1/4" below under heavy loads. Max engine...
  2. F

    1975 rude 9.9 starting issue

    motor is very hard to start (20+ pulls) then runs fine. will start first time on quick start. my plan is to first rebuild the carb. is that would I should do first? thank you!
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    18xd fuel issue

    hello, let me recap the problem I am having with my motor. day one of a fishing trip motor ran great, but on a extended wot run it started to loose rpms slowly over a couple mins then reved back up and was fine the rest of the day. day two started in the morning and ran well for 20-30 seconds...
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