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  1. christopher425

    Mariner 45hp Carburetor Leaking after Total Rebuild....stumped!

    Yes, they are adjustable. There's a little metal tab tab which sits agains the spring attached to the needle valve that you bend to determine the float height position. Thanks for the input. Every bit helps.
  2. christopher425

    Mariner 45hp Carburetor Leaking after Total Rebuild....stumped!

    Alright, quick update... Polished the carb seats and needles really well. Got the floats to spec (replaced one that looked suspect). Took it on the lake today and it still was surging at WOT. Not as bad this time and it took longer for it to first occur. Ran great otherwise. Got home just now...
  3. christopher425

    Mariner 45hp Carburetor Leaking after Total Rebuild....stumped!

    Took a quick look and saw gas on both carbs. Hooked up the fuel line and pumped the bulb. Fuel came pouring out of the bottom carb throat. So, probably the needle isn't sealing. Crazy thing is, these are brand new needles installed last year. Float should be level/parallel where the carb meets...
  4. christopher425

    Mariner 45hp Carburetor Leaking after Total Rebuild....stumped!

    When it shakes it just gives that "surging" sound like it does when the rpm's are going up and down. Nothing notable. No knocks or anything like that. I'll have to check the spark with a timing light next time I take it out. Doesn't seem to be overheating. New impeller installed last year...
  5. christopher425

    Mariner 45hp Carburetor Leaking after Total Rebuild....stumped!

    Hey Everyone! My'87 Mariner 2-stroke 4cyl (model# OB113850) runs idles fantastic ang great on startup, but after about 5 minutes at WOT the rpm's slowly drop and it begins surging causing the motor to shake. If I let off the throttle slightly it will smooth out and stop surging. It will keep...
  6. christopher425

    4000 rpm

    @Kyletalmadge Did you ever figure out your problem?
  7. christopher425

    Mariner 45hp Carburetor Leaking after Total Rebuild....stumped!

    Thanks fellas. I'll check them out. I swapped the coil that was in question with another. Not sure when I'll get it back on the water. Might be a couple of days. I will keep updating. Thanks for the help thus far.
  8. christopher425

    Mariner 45hp Carburetor Leaking after Total Rebuild....stumped!

    By too much fuel do you mean the carb mixture adjustment? Or the float? Is the bypass cover the one on the port side of the motor? I'm going to run a can of PowerTune through it and see if that can get rid of any carbon deposits which who'll hopefully help.
  9. christopher425

    Mariner 45hp Carburetor Leaking after Total Rebuild....stumped!

    I've rebuilt the carbs and put the floats at spec per the manual using a caliper. Pulled them off probably 10 times making sure I didn't miss anything haha. The floats are good and at the appropriate level and the needles are seating properly in both.
  10. christopher425

    Mariner 45hp Carburetor Leaking after Total Rebuild....stumped!

    Pulled my plugs and took a pic for you guys. Looks like I'm running rich on my bottom 2 and need to adjust carb mixture screw. I did idle a good bit yesterday while trying to run tests on the water. What do y'all think?
  11. christopher425

    Mariner 45hp Carburetor Leaking after Total Rebuild....stumped!

    Will do jimmbo. Thank you.
  12. christopher425

    Mariner 45hp Carburetor Leaking after Total Rebuild....stumped!

    Compression Values are Cylinder #1 - 120 Cylinder #2 - 125 (This is the one I'm seeing the loss of spark at WOT) Cylinder #3 - 120 Cylinder #4 - 105 Yes, replaced impeller last summer. Telltale has a good strong stream coming out. Also, checked the exhaust for blockage and couldn't find any...
  13. christopher425

    Mariner 45hp Carburetor Leaking after Total Rebuild....stumped!

    Hey All! I've got and '87 Mariner 2-stroke 4cyl (model# OB113850). At WOT she's only hitting 4000rpm and I know it should be closer to 5500rpm per the manual. I've done much work on her since I bought her used last summer. She cranks fine, idles fine, runs smooth. It just pegs out at 4000rpm and...
  14. christopher425

    20' Riviera Cruiser Speed Question

    Thanks for the pro-tip ahicks! I’ll definitely keep that in consideration for the future.
  15. christopher425

    20' Riviera Cruiser Speed Question

    Correct. I've got a tach ready to install and I'm planning to do that in the spring. Like my first post said, I'm just wanting to know if this speed sounds somewhat accurate for my setup. Still kinda new here and trying to gain as much knowledge as I can.
  16. christopher425

    20' Riviera Cruiser Speed Question

    From what I've been able to research and find, it's rated for 70hp. So, that would be a little undersized at 45hp which is what I have, but I'm not looking to upgrade right now. As I mentioned, I know she's gonna putt along and not blaze the open waters lol.
  17. christopher425

    20' Riviera Cruiser Speed Question

    Hey Everyone! I've got a 1990 Riviera Cruiser 20 footer with an '87 Mariner 45hp 2-stroke powering it (that's what came when I purchased). It's got an 11.1x13 prop and at WOT using a GPS app on my phone I hit 14mph average with me and another buddy on the lake. I've got manual trim n it, so I do...
  18. christopher425

    Need Timing Specs Please 😀

    Thank you Fatzbullet! Really appreciate the help.
  19. christopher425

    Need Timing Specs Please 😀

    No worries. I appreciate the effort 😀
  20. christopher425

    Need Timing Specs Please 😀

    I meant that I am waiting to receive manual. Sorry for the wording. Serial # OB113850
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