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    Merc 500 trim tab adjustment question

    Dummy question here.... I replaced the impeller in my old 4 cyl Merc 50 the other day. This was the first time I'd ever worked on a Mercury so I didn't know to pay attention to where the little trim tab was set before removing the bottom end. When I put it all back together I just pointed it...
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    General questions, mid 70's 50hp Mercury

    I'm considering buying a mid seventies 50hp Mercury locally but I have a couple questions I like to ask you first. Are there any "problem areas" on this motor I should be concerned with? If no, were they generally a good design and fairly reliable? Last question, Anyone have a ballpark...
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    My first little Merc, what is it?

    Normally I deal with the E/J motors because that's all you find around here, but today I happened to find a little-bitty Mercury. I'm guessing it's something under 5hp. (I've already tried the search function, but didn't find anything on it since I don't know what it is exactly. ) Like I said...
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    1956 Evinrude 30hp

    Hi folks,<br /><br /> I'm going to do my best to order the manual monday am, but in the mean time I'd like to ask a few questions about a motor I just got.<br /><br /> Today I was given a big old electric start Evinrude, model number 25924 which I was told was a 1956 30 horse unit. It came with...
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    Grumman 4.4 max engine rating?

    Hi folks,<br /><br /> I have a 1979 Grumman 4.4. She's perfect for me and also the nicest boat I've ever had. The only problem is that the certification plate is missing. Could anyone please tell me what was the maximum engine rating for this hull? Thanks!<br /><br /> Steve
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    ID this mystery 70's Evinrude please?

    I just picked up this motor which has seen better days.<br /><br /> I want to replace some parts on it but for the life of me I don't know how to identify it. It seems that the transom mount assembly has been replaced at some point because it is a completely different shades of blue than the...
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    25R71S 25 hp water diverter equipped?

    I'm about to replace the head gasket and thermostat on my 1971 Johnson 25 horse but now I have a question.<br /> Just before I began to install the new gasket I noticed that there were no water diverters mounted in either the block or the powerhead. Were the '71 models even equipped with water...
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    25 hp Johnson 25R71S, Exhaust in midsection?

    I posted a few days back about a 25 horse Johnson (25R71S) I got that supposedly had a failed impeller and just quit due to overheating and low compression (50/60 psi). The cylinders were just as pretty as they could be, and the motor wasn't locked up.<br /><br />Original post <br /><br /> Well...
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    Bore size? '55 Aquasonic 25 hp

    I just got a 1955 25 hp Aquasonic project motor model 25920 and I'm wondering what (or if) I can do anything with the block due to wear and some heavy scoring.<br /><br /> I have my mics handy and I can measure the bore but I don't know what the original bore size was supposed to be to begin...
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    71 Johnson powerhead options?

    Hi everyone,<br /><br /> New member here and I really appreciate your forum and all the great folks that have been helping others get their problems sorted out.<br /><br /> I have a problem of my own to ask about. I was just given a '71 25 hp Johnson (25R71S)that fried itself due to a failed...
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