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  1. Alumarine

    66 Merc 50 changing gear ratio

    Ok here we go again. I've got a 66 Merc 50 long shaft with a gear ratio of approximately 1.6 running a 9P prop which sucks big time. I have a LU from a 50 merc short shaft with a 2.0 gear ratio from a newer motor. The newer LU won't fit on my older motor the front 2 bolts are spaced a bit...
  2. Alumarine

    CDI Coil - Correct Connection Merc 50

    Hi. Thanks to help here I found out I could convert my 66 merc 50 points setup to a CDI setup from a 77 (I think) serial no. 7052356. Motor now runs with the CDI. When doing the conversion I put the wires on the same way as they were on the 77. Now that I'm cleaning things up - like mounting...
  3. Alumarine

    Merc 50 - torn exhaust tube seal

    Hi. Just pulled the gear housing on my 66 Merc 50 and noticed I only have half of the Exhaust Tube Seal. I've ordered the part and was wondering what problems I might have if I run it until the part arrives? Thanks again.
  4. Alumarine

    Merc 50 - Mystery Screws fell out of gear housing

    Hi there, went to check the impeller on my new to me 66 Merc 50 # 2096957 and when I removed the gear housing, 2 Stainless Screws fell out. Anyone know what these are for? Thanks
  5. Alumarine

    66 Merc 50 Strange Color Water on Muffs

    Hi. Haven't worked on an outboard since 1974 and have a question about my 66 Merc 50 project boat. Finally got the engine running, and noticed while on muffs that the water coming out of the drive was milky. The color is hard to describe but it almost looked like concrete slurry if that helps...
  6. Alumarine

    66 merc 50 magneto assy upgrade

    Hi there. I've got a 66 merc 50 4cyl # 2096957 with a what I believe is the Keukhaefer Mercury magneto that uses points and I'm not getting spark. Is it possible to swap in a slightly newer era breaker-less magneto assembly? I've got a line on a couple of slightly newer motors with bad lower...
  7. Alumarine

    66 Merc 50 Gear Lube Question

    Hi there. Just picked up a 66 (I think) Merc 50 4cyl Serial no. 2096957 and have a question about lubing the gear case. I was going to put 90W marine gear oil in but it looks like there is grease in there? Is that right? If oil is best, what's the capacity? Also, just above and to the right of...
  8. Alumarine

    66 Merc 50 Gear Lube Question

    ** Sorry, first outboard in awhile and posted here by habit. Hi there. Just picked up a 66 (I think) Merc 50 4cyl Serial no. 2096957 and have a question about lubing the gear case. I was going to put 90W marine gear oil in but it looks like there is grease in there? Is that right? If oil is...
  9. Alumarine

    Purpose of Trim Cylinder Anchor Spring?

    When I took off my trim cylinders on my 74 Mercruiser 140 one of the Anchor Springs jumped into the lake. Was wondering what the purpose was of this spring. thanks
  10. Alumarine

    Trim Pump Vent Screw

    Hi There. Just removed the Vent Screw on "my new to me" used trim pump and noticed that it looks like a #10 Sheet Metal Screw with a Blunt Nose. Just wondering if that's the correct screw for the vent? The fill screw is a machine thread. Also, I need to replace the plastic down hose (lower...
  11. Alumarine

    Mercury 110 Fuel Line Adapter

    Hi there. I've got a 1971 110 9.8 hp with a broken fuel line adapter -the one attached to the fuel pump that the the gas tank connector plugs into.<br /><br />My current one is the small one part # 32454.<br /><br />Can I replace it with a newer style larger one part # 22833.<br /><br />Thanks
  12. Alumarine

    73 merc 402 weight

    Hi there. I have a 1973 Mercury 402 2 cylinder motor.<br /><br />I'm thinking of replacing this motor but don't want to put on anything heavier.<br /><br />Anyone know the approximate weight of this think.<br /><br />Thanks
  13. Alumarine

    trim pump valve body & gear assembly ??

    Hi there. I thought I was finished working on this boat for a bit of time, but I guess not.<br />74 mercruiser with Trim Pump with remote reverse lock.<br />Went to fix brushes on trim motor and noticed a bunch of sludge in the pump.<br /><br />I know the valve body and gear assembly on the...
  14. Alumarine

    help with lower shift shaft reassembly

    I was going to replace my lower shift shaft seal but decided to also replace my shift shaft and shift shaft bushing.<br />I believe someone before me reassembled these parts incorrectly.<br />This is how I found things - on top of the bushing was a rubber washer then a .68" metal washer then a...
  15. Alumarine

    gear lube leaking out small hole in drive

    Hard to see in attached photo but where the red circle is there is a small hole and I have gear lube slowly leaking out.<br />I've just changed my impeller and was wondering if it is the oil passage o-ring that is leaking.<br />any help would be appreciated - thanks<br />74 140 mercruiser<br...
  16. Alumarine

    Thanks for getting my Glastron going

    After 2 solid months of work I finally got to test my boat this weekend. I'd like to thank everyone who helped in this endevor, I couldn't have done it without the help on this board and the search function. Too many to name and I'd probably forget some but a lot of them were the "usual...
  17. Alumarine

    Oops mixed up thrust washers

    Hi there, trying to get my boat out for it's maiden voyage and my helper put all my different prop hardware all in the same box.<br /><br />Got some old props that don't use the Flo-Torq II Kit and some new ones that do.<br /><br />I have 2 different thrust washers, one # 12-835467 is solid...
  18. Alumarine

    shift shaft play mercruiser

    Hi there. Just wondering how much play should be in the intermediate shift shaft bushing? It feels quite sloppy to me. The area in red has about 1/2" of play there. Darn, just when I though I was finished - no reverse. Thanks<br />
  19. Alumarine

    new rings and spark plugs too clean??

    Just fired up my newly re-ringed mercruiser 140.<br />Ran it for 15 minutes at 1500 rpm. Tried to bring it up to 2000 but had a slight miss. Oil pressure and temp ok. Timing ok. Pulled plugs and checked compression.<br />#1 150 psi plug was a nice tan<br />#2 150 psi plug was slightly black<br...
  20. Alumarine

    Coil Arcing Question

    Hello again. Was getting ready to fire my 74 mercruiser 140 for the first time since re-ringing it. Removed the coil wire and cranked it for 10 seconds a number of times to build oil pressure. I could hear what sounded like an arcing sound. Turned out it was my coil arcing from the metal...
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