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  1. K

    Buy a used block will parts swap?????

    THANK YOU !!! That is what i thought too the bolt on's are the same just different designs I can adjust to if needed.
  2. K

    Buy a used block will parts swap?????

    The motor is super clean you can tell it was stored and maintained well. My only concern is the old parts to new used block... I am looking to see the difference in production years from my engine to the other one
  3. K

    Buy a used block will parts swap?????

    Does any one know the years of the engine based on the serial number? I cannot seem to get good info. I have and 1989 and the serial seems to suggest its a 85-82 block .....makes no sense I have a 0C520320 the engine block I am buying is a 0C460580. I would love to get the years that would...
  4. K

    Buy a used block will parts swap?????

    I have a 1989 Merc 3.7 225 165 hp I have a 0C520320 the engine block I am buying is a 0C460580. the guy bought a whole motor but did it for the parts only.. Intake with carb/exhaust/starter heater exchange is all he wants and I can have the rest. So I need to add my starter /my intake/ my...
  5. K

    PCV valve/blow by issue

    Im paying 300 / I ran it and compression passed Dry and wet
  6. K

    Buy a used block will parts swap?????

    I appreciate your input, but you need to understand. I used to work on cars and boats. I’m trying to get verification of something. I’m pretty sure Zach accurate already. When manufacturers make engines, they usually stay consistent for a few years this way when they make parts for that block...
  7. K

    Buy a used block will parts swap?????

    1989 Merc 3.7 225 165 hp I have a 0C520320 the engine block I am buying is a C460580. The seller is keeping the intake manifold /exhaust manifold /starter/ heater exchange . I hope my parts will fit on the new block.
  8. K

    PCV valve/blow by issue

    My next issues is a match or not I have a 0C520320 the engine block I am buying is a C460580. The seller is keeping the intake manifold /exhaust manifold /starter/ heater exchange . I hope my parts will fit on the new block.
  9. K

    PCV valve/blow by issue

    Adding a 4.3 requires re-fitting the engine compartment .... NOT DOING THAT. lol. 3.7 front engine mount 4.3 side mounts and exhaust refit to. NO way !!!
  10. K

    PCV valve/blow by issue

    Well, I have an update. I found a guy that bought a block for spare parts and he really doesn’t need the block. I’m hoping to pick it up for $200. He paid five for it I guess. And I hear the dry wet numbers, which got me pretty excited. . Now we’re gonna go into the wonderful world of engine...
  11. K

    PCV valve/blow by issue

    I did do a wet test ......the numbers declined in 1 year... I posted the wrong picture of the beginning of this feed. I’m gonna show you what it was last year and then what it is this year.
  12. K

    PCV valve/blow by issue

    Yeah, that’s what I was really concerned about that. I dropped 140 to 115. Now I just gotta decide what to do with this. I’d like to finish the season. I’m not a big fan of magic fluid. I don’t think that it always works to get the rings opened up again, but I might try something. I think they...
  13. K

    PCV valve/blow by issue

    Yeah, I gave numbers from last year. I screwed up on the post and I can’t edit it. This is the actual numbers this year. Time to sell it ???
  14. K

    PCV valve/blow by issue

    I do have to say, though I posted the wrong numbers those are last year‘s numbers. I’m gonna try to attach this year‘s numbers.
  15. K

    PCV valve/blow by issue

    Thank you I was really worried about those compression numbers. Yaya got a replacement carburetor for an exchange. I convinced the guy that it must be leaking down. That’s why my valve cover gaskets stink the bloody hell. I’m really happy to hear about this. The new carburetors coming in on...
  16. K

    PCV valve/blow by issue

    1989 Mark cruiser 3.7 So I have a video I’m hoping I can post. I did a compression test. and I’m gonna show her now because I have a blow by issue, but it might not be that bad kind of normal for a boat of my age. I did some wet test and dry test. I’ll show you the results there. My second...
  17. K

    Belt size confirmation

    Well, actually, you’re 100% right I ended up figuring it out. I didn’t see this post but yeah pretty much a 50 or 51 inch belt will work 7/16. Now there is a little bit of rubbing and I think the old belt was the same scenario. It’ll eventually wear down properly. I don’t think they make a...
  18. K

    Belt size confirmation

    The Power Steering pulleys are 1/2 for sure THIS SUCKS!!! Now I know why it would squeal sometimes .. I need to find a better pulley
  19. K

    Belt size confirmation

    I have a 1989 3.7 Mark cruiser now I will say that I have an alternator attached to it from the previous owner. My question to you guys is though what is the bell because I went last week after the belt broke on me to a parts place by the lake and they gave me a belt which seem to be at at least...
  20. K

    1989 Merc 3.7 3.0. Need help remember part number

    THANK YOU !!!!!! This is so Helpfull!!!
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