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  1. Jhenry72

    Any "Fine Tuning" secrets on adjusting Carburator Idle Mixture screws??

    I have a 1975 Mercury 1500 and Finally after numerous hours of replacing this and replacing that, I actually got it to open up on the water! I have the Idle mixture screws set out a turn and a half from lightly seated now and I can get it up on plane, but has No hole shot. I've tried turning the...
  2. Jhenry72

    Correct Battery???

    Hello, Does anyone know the correct battery I need for my 1975 Mercury 1500? I've been doing some research and what I've been hearing is that I should Not use a Deep Cycle unless I am running additional Lights, Gauges, Stereo...etc. In which I am only running a Tach, and Fuel gauge. The battery...
  3. Jhenry72

    1975 1500 Water in Cylinders.... Big prob?

    Ok. I have been chasing 1 problem after another with this and just when I think I'm ready for the water, BOOM another problem. I started up the engine today (which took awhile) and seem to be a lot of water coming from the 2 exhaust ports behind the middle stripe. I've noticed while watching...
  4. Jhenry72

    1975 Mercury 150hp on the water Issues!

    Hello, I have problems with my Merc throttling up in the water. It seems to run really good while on the muffs. And I also put it in a tank and it runs good. But when I go to the lake, just seems like its off. And I can't get it to rev past 3500 rpms. I've done the "lync and sync" while both on...
  5. Jhenry72

    1975 Mercury 1500

    Hello, I am fairly new to the boating world and recently purchased a "New to Me" boat with a 1975 Mercury 1500 "Tower of Power"! The seller stated that the engine needed a new Internal wiring harness, which I purchased and installed. Long story short, I finally got the engine to fire and seems...
  6. Jhenry72

    1975 Mercury 150 hp Spark Issues

    Re: 1975 Mercury 150 hp Spark Issues Well, I believe I've figured out my problem! Guess I'll be need of a New wiring harness!! Geez!!
  7. Jhenry72

    1975 Mercury 150 hp Spark Issues

    Hello, I've got a question that I hope I can get pointed in the right direction. I have a 1975 Mercury 150 with No Spark. I have done a couple tests that I have read from other users and what I've come up with is that I have No power coming out of the green wire out of the Switch Box, which...
  8. Jhenry72

    1971 Checkmate Fuel Tank Replacement?

    Hello, I am new to the iboats forum and I have a few questions that I hope to get pointed in the right direction. I recently purchased a 1971 Checkmate MX-18 with a Mercury 150 hp engine. The question I have is that the original fuel tank has been removed and I would like to replace it but I'm...
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