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  1. M

    Questions about fuel pump

    One of the things I've noticed on the engine is that it seems that there's always been a bit of oil on the top of the fuel pump of my 1978 OMC 2.5L Stringer 400. So today, I'm doing a water trial and the boat's running terrific - it's not overheating (I've had problems with this recently) and...
  2. M

    Can someone explain the start aassist solenoid?

    My manual seems to be worthless on the subject. How exactly does it help?
  3. M

    It's ALIVE!!!

    After working on my 1978 Cobia OMC 2.5L Stringer 400, it's finally running. Buddy and I did the first water trial and had some issues. We've worked on the issues somewhat and I'd like your response on these items: 1) Overheating. The boat was running great at WOT until it began to overheat...
  4. M

    What I had to do to remove my water pump.

    Here it is: It took all of my strength to crank on that come-along to get that thing out. What ended up happening was that the entire gearbox came out. I wish i'd realized that it could all come out before this. Now I still have to split the water pump shaft from the gear shaft itself. Any...
  5. M

    Obvious question about the 400 tilt quadrant

    I finally got around to finishing the tilt on my machine (after a shaft break... arghhh) and it seemed to be fine... but now it just kind of works. When I was putting the tilt quadrant back on, I noticed that the very end of the gear, where it kind of sticks out like a penisula, was slightly...
  6. M

    400 Stringer - cooling system questions

    OK, after 3 months of playing around, my buddy and I get to some serious work putting my boat back together so we can actually use it. I haven't heard the engine run since I bought the thing, and then only for a second so as to not destroy the impeller, which hopefully is good. I hook up the...
  7. M

    What is it?

    Just a random question... on my 1978 OMC 2.5L there's a bell-shaped thing with a clear glass window that says "if you see gas in here..." then do something, I can;'t remember what. It's hooked to the bottom of the gas pump. What is this thing? Thanks, Matt
  8. M

    Rough Idle and loss of top end - 1998 Seadoo GSX Limited

    Hi, My jetski has quite a rough idle and it doesn't seem to go quite as fast as it used to. Otherwise it runs fine. I haven't ever tuned it up or anything like that in the 4 years I've owned it. Where should I begin to look to get it running better? Thank you
  9. M

    Understanding the gas tank

    I pulled the gas tank from my '78 Cobia today for repairs on the engine (project boat). The gas tank appears to completely covered in varnish inside, and I know it will need to be cleaned before getting the engine started. I took the important parts out of the gas tank, and I can see that...
  10. M

    Hole in Engine Block????

    OK, somebody please tell me that the hole in this engine block is normal and if anything is supposed to go into it to block it up. This is a 1978 OMC 2.5L. I was in the process of cleaning this thing in prep for a quick paint job to prevent further rust and for the new exhaust manifold when I...
  11. M

    Gelcoat spider cracks

    Hi all,<br /> I recently bought my boat knowing that it would require a bit of engine work. The boat appears to be in excellent shape itself as it's 28 years old. <br /> One thing that I notice about the gelcoat is that there are numerous places on the top shell of the boat and a few...
  12. M

    OMC 400 Stringer Tilt Part Number for the "Puck"

    Hi all,<br /> I need a good part number for the "cap" or "puck" that holds the worm gear shaft in place. It's the round piece of metal that has an o-ring on it that the end of the worm gear shaft goes into. <br /> I believe it's called a retainer/bushing but I'd like to be sure before I order...
  13. M

    1978 OMC 120 / 400 Stringer Tilt Motor replacement

    I need to replace the tilt motor on my 1978 OMC 120 / 400 Stringer drive. It is possible to do this without removing the entire stern drive? I know that I get get to the two bolts that hold the motor in, but it's the reinstallation that I'm concerned about.<br /><br />Thank you.
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