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  1. 4

    90 HP Mercury Compression Readings

    Hi All, I'm looking at possibly buying a 1991 Mercury 90HP (oil injected) long shaft with power tilt. The seller claims that a compression test has shown 120 PSI on all three cylinders and that no major work has ever been done on the motor since it was new, only seasonal fogging, annual gear...
  2. 4

    Adjustable Pitch Prop

    I had the blade repaired at a shop and the owner said that he had heard of them but hadn't seen one either. It actually works quite well and it only takes a couple of seconds to change the pitch. I did a little research and found out that it was invented by a Charles O'Conner from New York State...
  3. 4

    63 Evinrude 40 HP Head Scratcher

    I have a strange problem with my 1963 Evinrude 40 HP (Model 40363-DA converted to mechanical shift). It starts and runs beautifully at all speeds from dead slow to WOT. The problem is that, after 20 minutes or so it suddenly dies. It doesn't seem to matter what speed I'm running the result is...
  4. 4

    Thanks

    Just a word of thanks to those members who post their problems here and especially to the knowledgeable folks who take the time to contribute their experience and wisdom in finding solutions. I read the latest posts every day and have learned a great deal just doing that. Old dogs can learn new...
  5. 4

    1958 Johnson 10 HP Fuel System

    Hi all, I had a very nice 1958 Johnson 10 HP motor given to me that I understand requires either a pressurized fuel tank with Siamese hoses or it can be converted to a standard tank by installing a fuel pump from a 1960 to 63 model which I believe is Part no. 0388685. Any advice on this would...
  6. 4

    OMC Single Lever Motor Control

    I have a 1965 Johnson/Evinrude Frankenstein 40 HP with manual shift and I'm currently using the original Johnson Shipmaster dual lever control box with it. I would like to change to a single lever control system. The ignition/start key is in the dash, not on the control box, and the engine is...
  7. 4

    1962 - 3 HP Johnson - Carb Problems

    Hi all. I have a 1962 Johnson 3 HP (Model JW-17) that I use for trolling. It has a self-contained fuel tank on top of the engine that gravity feeds to the carb. The engine is old but has less than 100 hours on it. Compression is up to spec on both cylinders. It has always been stored indoors...
  8. 4

    Throttle/Shift Control Question

    I have a 1963 Johnson 40 with the two lever Simplex controls that originally came with the motor. I love the motor but I hate the controls. I've always been used to a single lever system and I just haven't been able to get comfortable with the older configuration. Is there a single lever control...
  9. 4

    !965 Evinrude 40 Cooling Port

    I have a 1965 Evinrude 40HP long shaft w/mechanical shift. With the size and position of the water intake port it's obvious that the standard muffs won't work for cooling the engine while on land. If anyone knows of a device or method for getting cooling water into the engine without the...
  10. 4

    Automatic Choke Question

    All parts are either new or seem to be functioning properly. I understand that it is absolutely critical that the hoses are properly connected to avoid engine damage so I would appreciate it if someone could verify that I have things straight before I make the final connections and try it. In...
  11. 4

    Automatic Choke Question

    I have something of an Evinrude/Johnson Frankenstein. The engine was originally a 1963 Johnson 40HP with electric shift. At some point the lower end was replaced by the previous owner with a mechanical shift unit so the cut-out switch was removed. The power head is from a 1963 Evinrude Lark and...
  12. 4

    Fuel Question

    This may be a strange question. :confused: I have a 1963 40HP Johnson that was obviously built at a time when unleaded gas was pretty rare. The manual specifies using regular automotive gas or marine white gas. Can someone tell me if white gas is the same as unleaded or do I need to find a lead...
  13. 4

    Long Shaft Conversion

    I have a 1962 long shaft Johnson 40 that I would like to twin. I've found a number of matches out there in good condition except that they are all short shaft models. Does anyone know if there was or is a kit available for adding the extra length? It would need to include the gear box, exhaust...
  14. 4

    Adjustable Pitch Prop

    I originally posted the following in another section but I now realize that this one is a more appropriate location. I tried to delete the original post but was unable to. My apologies for the double post. I found an aluminum adjustable pitch prop in the bottom of an old boat I recently...
  15. 4

    Adjustable Pitch Prop

    I found an aluminum adjustable pitch prop in the bottom of an old boat I recently purchased along with a 1963 Johnson 40 HP. I assume that it was once used on this same motor It has a half dime-sized nick out of one of the blades but it should be repairable. I'm not familiar with this type of...
  16. 4

    Not Sure What I Have

    I recently acquired an old Thompson Sea Coaster with a 40 HP Johnson that would appear from the cowling design to be a 1965 (pic attached). However, the model number (40363-DA) indicates that it is a 1963 40hp Electric Shift Evinrude. The confusion runs even deeper because I have found owners...
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