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  1. M

    Won't idle smoothly. RPM's build, engine pops, rpm's settle: then repeat.

    I have a 1988 Mercury 100 h.p. 2+2 that I was able to revive last year thanks to some help from this i-boats forum. I need your help again. My motor is not idling well (in the driveway w/ mufs or in the lake). It idles where I want it for a second but the rpm's gradually build over a 4 to 5...
  2. M

    How old is too old?

    My boat was last used in Summer of 2002. Winterized that fall and fuel stabilizer was added. I've already drained the tank so I can put fresh fuel in it but I have $45 worth of gas and would like to use it for something productive. If I mix 1:1 with fresh gas can I use it in a mower, gas...
  3. M

    Impeller prediction... will it work?

    For anyone who viewed the "What do I have?" thread, you know I have a 1977 Ford/OMC 302 w/ 190 H.P. V8 and an electric shift stringer outdrive on a 20' Larson Manta. After resolving some ignition issues, I think it's ready for a test run at the lake. It runs well in the driveway but I didn't...
  4. M

    What do I have?

    Just got a boat from my dad that he has not used in about 8 years. 19' Larson Manta boat. Title says 1977. Lists motor as 1977 OMC 190 H.P. I know from a stamping on the block that it is a Ford. I know from counting plugs that it is 8 cyl. I know the serial # is W563574. I know it won't...
  5. M

    Mercury 100hp w/ 2+2 system w/ fuel probs?

    I have started a new thread in hopes of attracting some fresh ideas about a stale problem. This has baffled me since early August, but with a lot of advice from this forum, I?ve been able to eliminate a lot of possibilities; however, the solution is still a mystery. For more background info...
  6. M

    1988 Mercury 100hp w/ acceleration problems

    I have a 1988 Mercury 100 hp outboard. It has the 2+2 system where the top 2 carbs get fuel for idle and slow speeds and the bottom two get fuel after the throttle lever is pushed farther forward (by actuating the accelerator pump...I believe). The boat has not been in the water for about 4...
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