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  1. 1985 Century Mustang

    O Ring Replacement on Drive Shaft Question Mercruiser A1G1.

    I have a question concerning the O rings that go on the Drive Shaft l, I'm doing my upper and lower seals on the outdrive .The seal kit came with Five O rings, 4 Black and One Orange. The Orange O ring is thicker than the other 4 and looks like it will fit fine. Do I use that one towards the...
  2. 1985 Century Mustang

    I have to do a gimbal bearing and bellows etc, I have a question regarding the shift cable. Merc A1 G1 3.0

    I'm replacing the gimbal bearing, bellows, hoses etc.on a Merc A1-G1 3.0. I'm taking off the bell housing to do this.l, as I deem it's better. Question, can I just disconnect the shift linkage and pull the shift cable out from the transom after removing the shift mechanism in the bell housing...
  3. 1985 Century Mustang

    Gimbal Bearing Installation Questions Alpha 1 Gen 1

    I just removed the gimbal bearing, and have a few questions. Alpha 1 Gen 1. A. Does everyone still freeze the gimbal bearing before installation. B. Is there a shaft seal behind the Gimbal Bearing on my configuration. C. Because I'll be installing a new Gimbal (Bellows), should I remove the...
  4. 1985 Century Mustang

    Spark Plugs for a 1985 Mercruiser 3.0 Alpha One 140hp

    Can anyone recommend a good plug for my engine. 1985 Mercruiser A1-G1 3.0 140 HP I'm currently using AC Delco MR43LTS, but they need to be replaced. If so, are the NGKs better, and what would be the correct plug # for them.
  5. 1985 Century Mustang

    Mercruiser Exhaust Tube vs Exhaust Bellows Opinions, and Part # for Tube.

    Does anyone here have knowledge/input in using an exhaust tube over a regular exhaust bellows? Pros and Cons. I'm kind of leaning towards the exhaust tube. However I heard it could be loud,,, is it that much louder? If I go with the exhaust tube , can you post which part # or tube i would...
  6. 1985 Century Mustang

    I'm doing my Bellows. Mercruiser A1G1. Are the Amazon Bellows Kits any good?

    Has anyone used Amazon Bellows Kits? If so did they hold up. Just getting some ideas before I purchase a Bellows Kit. I'm probably only going to need the Bellows is all. My Gimball Bearing and all the other parts are fine. Just curious to know if the actual Bellows are halfway decent. Thanks
  7. 1985 Century Mustang

    When I pulled the sterndrive today, the whole u joint was rusted. I think I forgot the Oring. Please Read.

    Ughhh, When I pulled the sterndrive off today the whole u joint assembly was rusted as shown in photo. It was fine last year, but I believe I forgot to put the large Oring in for the water feed, as (shown in photo below circled in yellow). Could this have been the main culprit? I'm thinking...
  8. 1985 Century Mustang

    Starter Bolts 1985 Merc A1-G1 3.0 140hp

    I need to order two starter bolts, one is long and one is short I believe. 1985 Merc A1G1 3.0 at 140 hp, Epic Failure yesterday. Both bolts snapped off, so I'm not 100% sure what bolts I need. Thank God I had Boat US, smartest thing I ever done with this boat. The starter was replaced last...
  9. 1985 Century Mustang

    Upgrading Merc A1-G1 Oil Pressure Light with an actual oil pressure gauge.

    On my 1985 Merc A1-G1 3.0 I have just an oil light on my panel, which would be red if there were an issue with the oil pressure. I'd like to replace that with an actual gauge. **Question** - Can I just swap out that light and install an actual gauge. Can anyone advise or send a link on which...
  10. 1985 Century Mustang

    Boating Safety Certificate Required Now

    I was advised by my neighbor last week that the boating safety course is now required and mandatory for all age groups here in NY. It's no longer grandfathered in. I just took the free course and passed, it took me about 2 hours. The course is free and it's very informative www.boatus.org/free
  11. 1985 Century Mustang

    Part name for the fuse and assembly next to ignition. 1985 Mercruiser A1G1

    Does anybody know the proper part name of the fuse housing that's next to the key ignition cylinder on the photo. I'm having a brain fart. I need a new one. It cuts out often. 1985 Merc A1G1 3.0
  12. 1985 Century Mustang

    What are normal temps idling with muffs on the sterndrive? Merc A1G1 Alpha one. 3.0

    Does anyone know what are accepted temps when idling with muffs on dry land? I'm going into 180 degrees with a new 140° Tstat. When I put it in gear, the temps come down around 140 or less at times. The impeller is new and was checked. No issues with impeller.
  13. 1985 Century Mustang

    Hotter than normal temps. I just replaced the impeller on the sterndrive, and pulled the circulator pump.

    Last week or so I replaced my impeller in the sterndrive and everything was running as usual without the thermostat in. With the suggestions/recommendations on this forum, I put in a new thermostat and it seemed to run fine at 140 degrees, which is normal in what I'm reading. Today I ran the...
  14. 1985 Century Mustang

    Excessive Oil/Grease by Alternator area.

    I'm getting a sufficient amount of oil by the alternator, I'm not sure where it's coming from, any ideas where I should check? I'm running a 1985 Mercruiser A1-G1 3.0 140hp. The block was rebuilt approx 12 years ago and has about 200 hrs on it since.
  15. 1985 Century Mustang

    Sterndrive Gear Oil - Alpha 1 Gen 1 3.0 140hp

    Hey all, I purchased this gear Oil (pic below) for my Merc A1-G1 Sterndrive. I didn't realize it, but it wasn't the blue colored gear oil like I had in it previously , I put it in anyhow. Is this ok? Is the blue gear oil better?
  16. 1985 Century Mustang

    Engine runs for 1 minute and stalls, then starts with no problem. Merc A1G1 140 HP

    I just started up the boat today after installing a new water impeller, she runs for a minute and then stalls. Seems like a fuel issue, no doubt. I didn't replace any of the filters yet since last year, Im gonna replace all the filters shortly and see if that is the issue. I still have to do...
  17. 1985 Century Mustang

    Some Play In Lower End Propeller Shaft Mercruiser A1G1 140hp

    I did my water pump today and noticed that the shaft (shown in photo) had some play when I removed the impeller housing and the bottom lower seal assembly under the water impeller housing, is this normal? Could the shaft bearings be shot because of that play?
  18. 1985 Century Mustang

    Winterizing a Merc A1-G1 Block Question Antifreeze

    I'll be winterizing my boat in a few days, and focusing on the block right now. Question, can I use regular antifreeze in the block, or do I need marine antifreeze?. After all it is a Chevy block. Your thoughts.
  19. 1985 Century Mustang

    Upper and Lower Drain Plug Merc Sterndrive Alpha 1 Gen 1 Question

    I'm replacing my gear oil and noticed the bottom drain plug has a yellow gasket, but the top doesn't have anything. Do both drain plugs use this yellow gasket or is it just for the bottom?. Does a Gasket or O ring go on the upper drain plug too?
  20. 1985 Century Mustang

    Question Spooling an old Senator 4/0 Reel with no Level Line.

    I just got an older Penn Senator 4/0 Conventional Reel and it's in nice condition. I noticed it doesn't have a level line, so this surely can be an issue when spooling it up. What's the best way to spool it evenly. I will be doing it by hand. Any good suggestions? Thanks
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