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    Scott-Atwater 3.6 compression

    I just had a '48-49' Scott Atwater 3.6 horse outboard donated to me. It seems to have low compression 65lbs. I thought at lease 100lbs is what would run and considered "good". I have been looking around the web and seeing powerheads being sold with 60lbs and advertised as "good compression" So...
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    looking for info on THE BIG RED BOOK

    I, like a lot of visitors to this site, miss the boatinfo.no/lib site. While there is a wealth of knowledge here, that was also a great source .Here is my dilemma, I would like to find a copy [printed or electronic] of what I knew only as "The Big Red Book" It was a guide posted on that site...
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    look for a part number for a starter

    I have a 1972 Evinrude model 50272c that needs a starter motor. the research I have done , says that two different starters were produced . the first was a Prestolite starter that had two brushes in it . the second was a Bosch that had 4 brushes. I would like to get my hands on the 4 brush...
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    how do I fix a pin drive prop

    I just bought a 1966 Evinrude 40hp that came with a prop [the older pin drive type] that is in good shape but appears to have shifted on the hub. the pin is tight to the hub almost capturing it . I did manage to remove it from the motor and was wondering if it can be repaired at home, and if it...
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    help with identifying my mercury

    Ok here is the lowdown , I have a mercury 3 cylinder motor that is either a 65, or a 70 horse . the way I got it, someone had already worked on it, so the cowling says 650, the lower end says 70 HP . I checked and the 65hp powerhead and the 70 could be interchanged. it has low compression on...
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    70 hp mercury thunderbolt lo compression on bottom cylinder

    I have a 70 HP (3 Cylinder) Ser #s 4571652 - 5579016 that has low compression in the lower cylinder. This is the engine that has two carbs, and the reed valve block is inside the engine around the crank. I am wondering if anyone has got inside one of these engines. I am thinking that perhaps...
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    attaching pulley system steering to a 50 hp evinrude

    I would like to mount my Evinrude 50 HP model 50272c to my boat . The boat has the older pulley/rope type steering system . I do not want to change that because I have other vintage motors that I use on this boat. The steering attaches to the older motors via a adapter that mounts to the...
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    Selectric shift question

    I just bought a Evinrude 50 HP outboard model # 50272c . It runs well , but does not shift into reverse. I checked the wiring and both the green and blue wires are hot when I push the reverse button as they should be. I also checked the ohms on the solenoids and the are at 6 ohms as they should...
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    johnson rkl24 40 hp water flow questions

    I have a Johnson 40 HP Rkl24 made in 1962, I am having some issues with the cooling system , When I remove the thermostat housing cover, the thermostat, the holder that it sits in, and the little check type valve that is inside that housing. Then put a set of muffs on it and turn the water on ...
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    johnson 40hp rkl-24 needs gearcase gaskets

    I have a 1962 Johnson 40 HP model RKL-24 Electromatic that the oil in the low end , or gear case, looks like chocolate milk . That's telling me that I need to replace the seals and gaskets in it . Does anyone have a part number for the set for this thing? I have found them separately but...
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    1962 johnson 40 hp RK-24-L Needs a voltage regulator

    I just got this motor from a estate sale. It is in real good shape including the control box. The voltage regulator is missing , I have read through the forums, and see that there are a few options. Does anyone have the part numbers for the regulator? maybe the other options? or a work around...
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    help with a 70 hp mercury

    I recently bought a boat that came with a 70 hp 3 cylinder model 650 engine . The cowl says it has thunderbolt ignition . It has good compression but no spark on any of the cylinders .I have disconnected the tilt switch and it made no difference. My research so far has led me to believe that...
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    help with identifying a mercury outboard engine

    I just acquired my first mercury outboard and am having trouble identifying the year and model . The cowl says its a 650, and 70 HP. The cowling also says Thunderbolt Ignition. It is a 3 cylinder ,with 3 coils, and has two carbs. The only id plate I see , is on the front of the motor, in...
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    winterizine a outboard engine?

    I have a 1966 Johnson 33hp outboard that I need to leave on the boat this winter here in upstate NY.The temps get down in the single digits here sometimes and I don't want to cause any damage. I am wondering if I need to run it in a test tank with 50/50 antifreeze, or if outboards drain enough...
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    '66 super seahorse manual vs electamatic shift

    I own a 33 hp Superseahorse model rx 16d that has been fitted with a electric starter and generator. I now have the opportunity to purchase a electramatic lower end. I am wondering what the advantages / disadvantages are.
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    voltage regulator for a 1966 33HP Johnson rx16

    Hi, I have a 33HP Johnson, model RX16d. I have installed a working generator and bracket, however I do not have a regulator . Can anyone tell me if they have found a workaround for the regulator that was produced for this system [they are hard to find] Perhaps something that is still produced...
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    1966 Super Seahorse 33hp, adding electric start

    Hello , Once again I turn to the I-Boat forums for advise. I just had a Super Seahorse 33 HP model rx-14 [and I think that's a D at the end] gave to me. I got it running today , it has only a pull starter. I would like to know if I could adapt this for electric start. perhaps a flywheel from a...
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    '54 evenrude big twin 25 hp producing sludge

    Hi I have a 25 hp Evinrude Big twin that I have been working on . thanks to all for all the advise so far. I have it set up in my test tank, and after running it for 15 minutes I see some black sluge floating on top of the water. I am not sure if this is from the fuel mix, or perhaps the...
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    i need some info on a johnson seahorse hd 20

    I came into a Seahorse model HD 20 . With some tinkering, it now runs great. My research thus far tells me that it was produced in '41 or '42 and is a 2.5 HP. I would like to know what the original color of these motors were. It has a greenish color to it, but really does not look like paint...
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    specs on a seahorse hd20

    I just came into a Johnson seahorse ,model HD 20 . The research so far has told me that it is a 2.5 hp. and manufactured in '41 or '42 . I am looking for info and sources, for points, plugs,and condensers , right now it has no spark.{I will be checking the coils today] Any advise would be...
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