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  1. Keyboardman

    Repowering old Tri Hull

    I'm going to repower my old '74 model Tri Hull with a Johnson 75 but the transom bolt holes from the old 50 are different. What's the best way to plug up the old holes? Also best way to seal the new bolts under the waterline on the new engine? Thanks
  2. Keyboardman

    OMC 2.3 to 4.3 swap?

    Hi all, I came across a OMC 4.3 engine and was wondering if it will mate up to the outdrive I already have in my boat on the 2.3l. Thanks
  3. Keyboardman

    Tapping sound from powerhead '76 75hp Johnson

    Have a tapping sound coming from the powerhead of a new to me 75hp Stinger engine. My old 50 makes that sound a little too but I've never had any problems with it. Possible bearing ready to go out? Thanks.
  4. Keyboardman

    Replace 2.3L OMC with 3.0 Mercruiser?

    Hi all. I have a locked up 2.3l OMC and have come across a good running 3.0 Mercruiser and outdrive in a junked out boat. How much trouble making the swap? Am I going to have to do a lot of transom work to retrofit it? Thanks.
  5. Keyboardman

    Removing 2.3l engine

    Hi all, I've pulled many automotive engines but this is my first marine engine I'm replacing. I'm guessing that the intermediate housing comes out with the engine as a unit and then separate it from the engine after removal? I can see two large mounting bolts and nuts, is that all that holds it...
  6. Keyboardman

    Difference in 2.3l exhaust manifolds?

    Looking at a replacement manifold but it has less bolt holes than mine. Will this new one work okay? Thanks
  7. Keyboardman

    Difference between Automotive and Marine head gasket?

    Looking to replace my OMC 2.3 engine with a Ford ranger engine. What's the real difference between an auto and marine head gasket? Was talking to an old marine mechanic and he said as long as you flush the engine after use there's nothing wrong with using one.
  8. Keyboardman

    How to test an OMC 2.3L Exhaust manifold

    Hi all, before I trash this 2.3 Cobra set up I have I'd like to at least test the manifolds. I have the exhaust and riser off. The outside looks good visually and the insides are rusted up quite a bit. I've heard about using Acetone. Can I fill up the exhaust ports to see if it leaks? What's...
  9. Keyboardman

    OMC 2.3L Repower options?

    So I have a beautiful boat and trailer I got for $100 with a locked up 2.3 in it. What are my options on repowering this boat. Is there another engine that would bolt up to the outdrive or what about looking for a different sterndrive set up altogether? Thanks
  10. Keyboardman

    OMC 2.3 cobra engine

    Hi all, I just picked up a 1991 sunbird with a 2.3 OMC cobra engine. The engine is locked up. I was wondering if the Ford 2.3 engines that came in Pintos, Mustangs and Rangers is the same engine? Could I use a 2.3 Ford short block to rebuild this boat engine? Thanks
  11. Keyboardman

    Skeg replacement

    Hi all, The skeg on the 76' 75hp stinger I'm working on has been damaged and it's been ground down a lot by some previous owner. I've been looking online for one of those SS replacements that just slip over whats left and you bolt it on. I'm not having any luck finding any manufacturers that...
  12. Keyboardman

    Plugging transom holes for engine swap

    Hi all, I'm replacing the 50hp engine on my boat with a 75hp and the transom bolt holes are different on the new engine. What is the best way to plug the old holes? The boat is an old fiberglass tri hull. Thanks!
  13. Keyboardman

    Water in lower unit Johnson 75 Stinger 75ELR76D

    Hi all, Just picked up the 75 Stinger which had been laying around un used for years unknown. I drained the lower unit and at first a little clear water came out and then the rest was black oil. Very little filings on the magnet screw. Assuming water has been getting in to the gearcase, what...
  14. Keyboardman

    Intermittent spark 50ESL74

    Hi all, I'm getting intermittent spark on cyl #1 on my engine. Have the open air tester set at 7/16 and while the spark is good and crisp blue, it seems to be erratic. I've checked the sensor coil with an ohm meter and it reads 16 ohms, within the specs and it's not grounded out. I swapped out...
  15. Keyboardman

    Used Johnson Stinger 75hp opinions?

    Hi all, I'm looking at a Johnson 75hp Stinger along with another Johnson 75 and an Evinrude 75 part engine. All years unknown right now. I'm looking for opinions on these engines. Are they any good, reliable, any inherent probs? I can pick up all three for $400. Thanks
  16. Keyboardman

    Johnson 50hp cutting out at WOT

    Hi All, My '74 Johnson 50 started acting up last weekend. It starts, idles fine and runs great up to 3/4 throttle. Anything above that, and it starts cutting in and out. The tank is vented, the bulb primes hard and I see no kinks or leaks in the fuel line. I've never had this problem until last...
  17. Keyboardman

    Identifing Year Model for 25hp Suzuki help

    Hi, I've just acquired a 25hp Suzuki tiller steer engine and can't seem to find out what year model it is. There is a plate with a serial number but no Model ID that I can find. Is there anyway to ID this engine just from the serial number? Thanks guys.
  18. Keyboardman

    Spark plug choice for '74 Johnson 50hp?

    Hi guys, The factory service manual for my '74 Johnson 50 says to use a Champion UL-77V surface gap type plug which I'm currently running. While talking to a mechanic friend of mine he suggested using a standard type Champion QL77JC4 plug instead. He said that later on they found out that a...
  19. Keyboardman

    '74 Johnson 70hp opinions needed

    Looking to repower my boat with a bigger engine and came across a '74 Johnson 70hp for $500. Was wondering if anyone had any opinions on this engine and if it's worth looking at. Thanks!
  20. Keyboardman

    50hp Johnson carb swap?

    Hi guys, been having no luck in finding carbs for my '74 50hp Johnson. I did find a set of carbs from an '81 model. Will they work on my engine or should I keep looking for originals. Thanks
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