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  1. C

    DF90a mounting bolt dimensions

    I'm going to be installing a brand new DF90A on a boat that I'm building, so I'm trying to make sure i have all the required hardware so I'm not scrambling when the engine shows up. I'm stuck on exactly what size bolts I need, I know it's M12, but beyond that there are two dimensions that are...
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    Question on 1977 evinrude 25hp water pump

    I have a 1977 evinrude 25hp (model: 25703S) and my OMC manuals only go back to 1981, at which point they had apparently switched to the stupid plastic housing with stainless insert. This outboard has the single piece cast water pump housing but what I am not sure of is whether or not it should...
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    Damaged CCMS reeds

    I have a 1996 mariner (mercury) 40hp and have had CCMS reed valves on it for just over a year, recently it started starting and idling poorly so I blamed the carburetor, but found destroyed valves, the worst pedal hanging open nearly broken off. I adjusted my idle mixture correctly and kept it...
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    Need drive coupler for 30/40hp 2 stroke power trim

    I have a 1996 30hp 2 cylinder 2 stroke motor and I'm converting it to power trim. I bought a power trim unit with a new motor really cheap that didn't work; previous owner gave up on it and bought a whole new PTT unit. I took it apart and figured out the reason it doesn't work is because he...
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    How do I prime the carburetor with oil injection?

    This may be a stupid question, curiously it is not addressed in either the user manual or service manual (ie. i may be overthinking this...). I have a 1996 mariner 30 with the oil injection system, I have tested this to be working fine and that's not my issue. I'm not new to outboards, but i am...
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    My Johnson has a weak stream

    I have a 1981 35hp johnson that has an intermittent, spurting stream at hot idle; see video: This doesn't happen at cold idle, but perhaps because the idle drops down some after the engine is up to temperature? I don't know if this is an overheating engine, blown headgasket, normal behaviour...
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    At my wits' end with a 30hp mariner

    I bought a boat with a 1996 30hp mariner 30 that has oil injection and I cannot get it to run well. The boat is a 14ft aluminum Lund. It was accelerating very slowly. It would eventually reach a plane, but it took a long time to get there, this engine should have snappy throttle response, but...
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    Starcraft plunges bow at higher speeds

    Hi all, I have purchased a 14ft starcraft that doesn't really handle well; I'm sure it's a setup issue, I just don't know how to correct it so i'm looking for some guidance. Cruising between about 15 and 20 it's ok, but it starts to stuff the bow, anything over 25 is scary, I brought it up to 32...
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    Broken flywheel magnets; looking for new flywheel

    Hello, I have a problem with my 1996 30hp mariner; the flywheel magnets are coming apart! It's electric start only obviously with a charging coil. I caught it before any damage was done to the stator coils, but I cannot find a new flywheel to save my life. I just bought this boat because it was...
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