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  1. CLi87

    Can I use slightly longer push rods than stock on 454 Gen V?

    Are they not the same part #? https://www.perfprotech.com/mercury-marine-parts-catalog/cylinder-head-and-rocker-cover74l-bravo/assembly/1621/180?model=418 That's the parts diagram for my Gen V by serial # and it shows part #75589 and #75590...
  2. CLi87

    Can I use slightly longer push rods than stock on 454 Gen V?

    No, I'm rebuilding the top end of my Gen V
  3. CLi87

    Can I use slightly longer push rods than stock on 454 Gen V?

    So I had several bent push rods due to seized valves so I bought a full set on ebay that supposedly came from an 89 454, which should be the exact same push rod as the part #'s are the same for the push rods between the 89 454 and my 93 454 Gen V, but upon examination both the intake and exhaust...
  4. CLi87

    What is this guard around the valve spring?

    I actually just re-used the original ones, they were in good shape and the engine only had 8 hours on it, but had been sitting for 25 years. Do you have a link to the improved seals you're referring to?
  5. CLi87

    What is this guard around the valve spring?

    The valve rotators are the spinning part on the bottom of the valve, but can I just leave the oil control sleeve off? They're a real pita to install, it seems like their purpose is...well oil control? It seems in this engine there's not really any valve stem seal, just a plastic cover really so...
  6. CLi87

    Are all Mercruiser 3.0 front sump oil pans the same?

    Does it matter if it's a 2 piece RMS or 1 piece RMS? Same pan?
  7. CLi87

    What is this guard around the valve spring?

    Very interesting, I've never seen them before, is it a big deal to leave the rotators off?
  8. CLi87

    What is this guard around the valve spring?

    Do I need to have these? It was a pain to remove and looking like a worse pain to reinstall and it's not on the parts diagram breakdown for my engine
  9. CLi87

    What is this guard around the valve spring?

    Oops, sorry, forgot to attach the pic
  10. CLi87

    What is this guard around the valve spring?

    I'm rebuilding the cylinder head on a Merc 7.4 and was wondering if anyone knows what these metal guard things are around the valve spring? I don't see them in the parts diagram either.
  11. CLi87

    Are all Mercruiser 3.0 front sump oil pans the same?

    The bottom of my oil pan is rusted and I'm looking to replace it and was wondering if all of the front sump oil pans are the same between years? Mine is a 2007 Merc 3.0 TKS
  12. CLi87

    Mercruiser 7.4 Starter Grinding/Partial Engagement?

    I ended up drilling the hole out larger and tapping it and then putting an E-Z Lok threaded insert in.
  13. CLi87

    Is the Mercruiser 7.4 Gen V an interference motor?

    Long story short, I did a compression test when I got the boat and it all tested out fine, did some work to the boat over a couple of months and now the exhaust valve on cylinder #1 is stuck open. I took the valve cover off and the rocker was loose and when I pulled the push rod out I noticed it...
  14. CLi87

    Does anyone have pic of distributor on Merc 7.4 Gen V?

    Found the issue, exhaust valve on cylinder #1 is stuck open, not sure what happened, I did a compression test when I first got the boat and compression was good, changed the oil pan gasket and rear main seal and now the exhaust valve is stuck open. Also there's no outdrive or water connected to...
  15. CLi87

    Is the Mercruiser 7.4 Gen V an interference motor?

    Does anyone know if a Mercruiser 7.4 Gen V is an interference motor? I tried researching it but i'm getting a lot of differing answers, I'm guessing it depends on the generation of the motor but I couldn't find a definite answer to if the Gen V was interference or not.
  16. CLi87

    Does anyone have pic of distributor on Merc 7.4 Gen V?

    I'm working on a 1993 Mercruiser 7.4 Gen V, it acts like it tries to start but will run for a second or too and then stop and backfire through the carb, I didn't touch the distributor, so I would think timing should be right, but the engine is new to me so no idea. I'm thinking the backfiring is...
  17. CLi87

    2001 Mercury 50 hp 2 stroke leaking fuel

    Thanks! That's what I was thinking too, also started removing the carbs for disassembly to see what's wrong.
  18. CLi87

    2001 Mercury 50 hp 2 stroke leaking fuel

    Serial # is 0T458817, also uploaded a pic of the specs as well as a pic of the 3 carb setup, none of them have a screw in that hole and only the middle one leaks fuel when I pump the primer bulb.
  19. CLi87

    2001 Mercury 50 hp 2 stroke leaking fuel

    I'm working on a 2001 Mercury 50 hp 2 stroke I recently got, it had a bad starter and starter solenoid so replaced those and she started right up. My issue now is there appears to be fuel leaking from a hole on one of the carbs, was wondering if anyone knew what that hole is for and why it would...
  20. CLi87

    1985 SeaRay Mercruiser 165 no spark at the plugs

    Did you check your neutral/safety cutoff switch?
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