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  1. Beckoning

    100hp 4cyl, oil injection, 1989 runs on 2-3 cylinders

    This motor is a wonderful, wonderful motor that has given me years and years of superb service. Now, she sputters and refuses to run on 4 cylinders. She starts and will keep running but at 2000rpm, but at 2000rpm+, cylinders #3 and #4 don't kick in as they should. She runs very rough. She...
  2. Beckoning

    100hp power tilt

    1989 100hp, oil injection 2-stroke. How to check the hydraulic fluid level for the power tilt? What kind of fluid to use?
  3. Beckoning

    Merc 9.9 4-stroke won't start

    For many years, I've use my trusty 9.9 (2009) Mercury on Lake Michigan for a trolling motor. I only use non-ethanol gas. The 9.9 used to always start on the 2nd or 3rd pull, and runs well most of the time. I ran it out of gas in November to put away at storage. When preparing the boat the boat...
  4. Beckoning

    Hotter spark plugs for 9.9 4-stroke?

    My 2009 Merc 9.9 4-stroke is used only as a trolling motor, mostly at very low rpm, 800-1100 rpm. I motor out onto Lake Michigan using the 100hp, turn off the 100hp, then fire up the 9.9 to troll at 800-1100 rpm for 2-3 hours. Fouling spark plugs is a common occurrence. Would a hotter spark...
  5. Beckoning

    Sta-bil, 9.9 float valve

    Mixed Sta-bil into gas on my 9.9 4-stroke last Fall. Upon trying to start it, I squeezed the bulb a couple times, hit the primer, choked it, pulled the recoil starter many times, and nothing. Smelled gas and it was dripping from the carb, removed plugs and cylinders were full of gas...
  6. Beckoning

    9.9 Faulters badly after running for an hour

    In 2016, I posted a similar request and received no responses. Someone out there must know how to solve this problem. My 9.9 (presumably 2009) Mercury 4-stroke kicker motor runs good for an hour at 1200-1400rpm, then it begins to cough and sputter and run on one cylinder. I put it in neutral...
  7. Beckoning

    9.9 year?

    I have a 4-stroke Mercury 9.9hp with serial number OR301985. I bought it used 6 years ago for a trolling kicker, and it has given me fits. Before I get manuals and parts, I want to make sure I have the year correct. I looked at the serial number guide on this site, but it only goes to 1990...
  8. Beckoning

    idle speed adjustment 100hp

    1989, 4cyl, 100hp, oil injection, 4 carbs. How to adjust idle speed? In neutral, runs about 1,000 rpm so there is a significant "clunk" when putting into gear. How to adjust speed down? Do I do the adjustment at the lower cable turning the turnbuckle clockwise? Where to get a free service...
  9. Beckoning

    Starter? Solenoid? battery cable? Other? 1989 Merc 100hp, 4 cyl.

    Merc runs like a charm. No saltwater use ever, Lake Michigan only. Dual battery system (each 12.7v) through Perko switch installed 6 yrs ago. For past 2 years, 50% of the time, starter just Whirrrrrrrs without engaging on the flywheel. If I hit it a few more times, it will finally engage...
  10. Beckoning

    steering cable lube

    A year ago, I submitted a similar post, but need some additional input. ​​​​​​​My boat is fresh water only...no salt water. My steering is very stiff, and the rack-n-pinion cable is very difficult to remove and replace, so I'm trying to lube it to gain another year or two. My diagnosis is...
  11. Beckoning

    Merc 9.9 kicker faulters

    My 2010 Merc 9.9 4cycle kicker seems to run fine for 15 minutes, then seems to load up and start running on one cylinder. If I rev it up for a few minutes, it finally clears and runs smoothly for 15 minutes, then begins faultering and running on one cylinder again. I use only non-ethanol...
  12. Beckoning

    cavitation? prop spline gear?

    '88 100hp, 4 cyl oil injection. For no apparent reason today, while cruising at 3,500 rpm, the engine raced as if it came out of gear. I checked the prop for damage (cavitation?) and it was clean, even though it is an old prop. Nothing has changed on the boat to cause interference to the...
  13. Beckoning

    oil level warning beep '88 Merc 100

    1988 100hp 4cyl oil injection, 19' Sea Nymph Great Lakes Special. I am posting this on a few FORUMS to see if I can get as much information as possible. For no reason yesterday, warning horn beep...beep...beep from Commander Control box. Not a constant beeping, but regular beep, similar...
  14. Beckoning

    beep....beep....beep oil level warning

    1988 100hp 4cyl oil injection, 19' Sea Nymph Great Lakes Special. I am posting this on a few FORUMS to see if I can get as much information as possible. For no reason yesterday, warning horn beep...beep...beep from Commander Control box. Not a constant beeping, but regular beep, similar...
  15. Beckoning

    beep....beep....beep oil level warning

    1988 100hp 4cyl oil injection, 19' Sea Nymph Great Lakes Special. I am posting this on a few FORUMS to see if I can get as much information as possible. For no reason yesterday, warning horn beep...beep...beep from Commander Control box. Not a constant beeping, but regular beep, similar...
  16. Beckoning

    Proper oil

    I have 3 questions because the manuals I have don't specify: 1) Correct gear oil for bottom units on my 1988 100hp Merc (less than 1 pint) and 2010 9.9hp Merc (about 1 pint), and 2) Correct oil for 9.9 Merc 4-stroke. It is used 100 hrs/summer in Lake Michigan (45-70 degrees temp) at trolling...
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