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    1979 Merc 200 Whats up with these

    I used a reliable compression tester . All 6 cylinders all had readings of between 125 and 129. The 129 reading was on the opposing cylinder to the one from which the bolts pictured came from. All of my spark plugs are extremely clean as if washed . I attribute that to the sea foam in the fuel...
  2. W

    1979 Merc 200 Whats up with these

    I used a reliable compression tester . The cylinders all had readings of between 125 and 129. The 129 reading was on the opposing cylinder to the one from which the bolts pictured came from. All of my spark plugs are extremely clean as if washed . I attribute that to the sea foam in the fuel...
  3. W

    1979 Merc 200 Whats up with these

    I will recheck it tomorrow, I forget if it was 125 or 150. I do remember that all cylinders were even. It runs well in a 55 gallon drum. I have never ran it in a lake or other . Thank you for your reply.
  4. W

    1979 Merc 200 Whats up with these

    In my attempt to have my temperature alarm working I found the senders wire was missing. When I removed the two head bolts securing the temp sender I found the bolts pictured full of carbon or black soot. So my questions are many but start with how did theses bolts get a carbon build up on...
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    2000 Johnson 200 Ocean Pro - Out Of Ideas... Please Help

    2 cents. My harbor F compression gauge is only used to find if the numbers are even. I have been through a few of these gauges. They all seem to run at least ten pounds lower than my Snap On or Cornwell compression gauges. That being said your compression is still low but I see your point in...
  6. W

    Mercury Optimax 115 2 stroke flywheel grinding

    weak battery or connections. flywheel not torqued into proper position. doa new starter.
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    Very loud "thunk" while underway...

    If it was not the baby ruth or other object I would say to check your shift rod and cables for proper adjustment. I have had the same unkwown clunk which turned out to be a bad lower unit probably caused by me when changing out the impeller and not checking my shift rod adjustment upon...
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    1979 Mercury 200 2 stroke Bad lower unit replacement question.

    Yes. It was similar to Cam follower assembly #850315A1 but did not have the three ball bearings. Was it supposed to have the three ball bearings ? It did not . I knew I was in trouble when I ordered a replacement reverse gear part # 43 67889 . This was the number stamped on the gear which was...
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    1979 Mercury 200 2 stroke Bad lower unit replacement question.

    Serial # 5321.... Motor came with a boat I purchased. I thought the shifting and linkage was was just off a spline . It shifted through the gears but it did not feel right. I took the unit apart and found the shift cam, reverse gear and clutch were bad. Trying to look up parts I realized it was...
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    150 EXEOM Choke solonoid picture.

    Not the cover the valve stem. Easy to replace as I have a kit for that. The question was really about the condition of the solonoid. Good or bad. It still works. Racerone leads me fix the stem and use it ? Dingbats reply leads me to replace the solonoid. A 200.00 dollar OEM or 57.00 Chinese...
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    issues with 89 30hp Evinrude

    ?. " .... primed from the choke " ? Primed or choked ?
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    150 EXEOM Choke solonoid picture.

    My solonoid valve was making a mess, leaking fuel . Upon inspection I found it was cracked. I pulled the entgire solonoid out and upon inspection found the bottom of the solonoid looked like it may have been burnt or on the way to problems. Is this the sign of internal heat on the way to...
  13. W

    Mercury 80hp pop/backfire out exhaust

    Go with Dave. You need all three firing correctly and if not find out why.
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    Harness issues

    My two cents to explain. The harness controls the power provided by the battery cables as well as the features of the motor( choke , tilt, start, stop..., ). The battery cables are not considered part of the harness. Chris is just saying you need to correctly wire both battery and harness wires.
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    Mercury 1977 200HP with exteral Trim/Tilt motor inside boat mount.

    I had several shops act as if I were asking to do something unthinkable. I have become slightly enlightened on the subject of the hydraulic line needed and how I will go about getting closer to finishing this project. Racerone set me on the right track regarding my issue of replacing or...
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    Mercury 1977 200HP with exteral Trim/Tilt motor inside boat mount.

    This model came with the option for an inboard/ outboard. The bump is where the blower would have vented. It is also used to cover the bilge outflows. It really does not have much structural integrity. The boat is quite light as it is single hulled , I am still undecided on the Merc 200 (a bit...
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    Mercury 1977 200HP with exteral Trim/Tilt motor inside boat mount.

    Actually the pump you see in the picture is in my worse scene scenerio placement, it is not affixed. I removed the solonoids as I am still deciding what goes where. I was not planning on a spashwell, I would rather have the transom open as it is. You can see the fiberboards the previous owner...
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    Mercury 1977 200HP with exteral Trim/Tilt motor inside boat mount.

    I stand corrected.
  19. W

    Yamaha binnacle for Mercury outboard

    The binnacle I have is Yamaha OEM. I also have an old Morse single lever which is universal. I wanted to use the Morse but I need it to have a neutral safety switch which it does not. I have a switch but do not know how or where to install it. It appears different from the moodern ones which...
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    Mercury 1977 200HP with exteral Trim/Tilt motor inside boat mount.

    Serial 5239232 through OC100860. I may be mistaken but I beiieve it is a 1977 or 78. If I am wrong and it is newer that would be a good thing. I spent a day going to hydraulic shops with the hoses in hand. Each shop referred me to another ( " theses guys will have it " ) but nobody did. Part of...
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