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  1. boatdude100

    Bogs down at half throttle classic 50 1986

    Runs fine up to 1/4 throttle and idles well Further acceleration does nothing although the carb control levers are moving on both carbs. Interestingly, when carb cleaner sprayed in 1st (upper) carb it tries to stall motor, when sprayed in second (lower) carb, no change. Why won't this motor...
  2. boatdude100

    0 PSI cylander 1 Mercruiser 3L (1995)

    Wanted to share findings from my initial thread start with 0 psi in one cyl. Pulled head, had bent valve, replaced, resurfaced head. total cost $800.
  3. boatdude100

    how to change voltage regulator 3L LX

    I may have fried mine with big spark while grounding centre terminal of distributer. Alternator doesnt seem to be charging Id like to start by changing voltage regulator Where is it? 3L LX 1995 Digital Electronic Ignition Is it an easy swap? Thanks!
  4. boatdude100

    how to replace automatic choke

    3L Digital ignition LX 1995 I think maybe mine is fried. It is still over 1" wide after giving a pump to cold start engine. Is this difficult to replace- is there a set up required that I can easily screw up after replacement? Thanks!
  5. boatdude100

    What is sound when key first turned on 3L LX?

    3L LX Digital Electronic Ignition 1995 OF367647 When i First turned key there used to be a sound. I guessed it was fuel priming? maybe auto choke? I stupidly grounded the centre cable that goes to the distributor to the engine when compression testing now no sound. And automatic choke doesnt...
  6. boatdude100

    Is driving boat without power steering belt ok?

    3L 1995 Mercruiser. Have to get it to the boat launch, pulley bracket broken so I was thinking I would remove belt and drive it over. Can I wreck something doing this? It is a single dedicated belt, not a serpentine...
  7. boatdude100

    Broken power steering bracket 3.0 L

    I can't figure out how to get the pump off of the bracket which is cracked at the bottom! Do I really have to remove the pulley? The rear bolt came out but there seems to be a sleeve that won't budge so I can't remove the pulley even if I got the front bolt out! Whats up with that? The front...
  8. boatdude100

    How do I lenghten idle cable? 3.0 LX

    Can someone clarify how to do this? Unreliably returns to idle between 1000-500 rpm and I noticed there is a bit of cable slack. I cant figure out how to adjust it so cable exerts pressure on idle adjust screw. I think this is the problem after reading the following post...
  9. boatdude100

    other gas filters than main one in 3.0 Mercruiser

    We all know there is one main gas filter under the fuel pump. I have read there are other inline (perhaps) gas filters... maybe one in the fuel pump... maybe one by the carb. I see none. Where exactly are they please. 1996 3.0 L Alpha with electronic ignition.. Engine bogging down on...
  10. boatdude100

    9.8 wont shift into forward

    1982 vintage, grinds gears into forward, Its like its not going all the way into gear. Any thoughts? Thanks!
  11. boatdude100

    Is removing head of 3L a DIY job?

    1995 mercruiser 3L Is there a difficult set-up afterwards to get it running? Like valve adjustments or anything or is it just bolt on and torque Thank you
  12. boatdude100

    0 PSI cylander 1 Mercruiser 3L (1995)

    Engine shaking at idle and low speed forward gear. Easy to start when giving throttle. Runs fine high speed. Compression test shows (starting from front of engine.... 0 180 148 122 How doomed am I? Can it be a head gasket, valves or rebuild? Man, this has been a bad day. Any positive thoughts...
  13. boatdude100

    How to do compresson test Mercruiser 3L LX

    I know the answer is here somewhere, I just cant search/find it. (Electronic ignition) Qs: 1. Do I pull all the plugs at once then test? 2. How exactly... do I ground out the spark plug lead that goes in the top of the distributor cap or do I HAVE to do it at all? 3. Does the throttle...
  14. boatdude100

    Must I pull engine fto replace transom? 3L Mecruiser

    Do I have to remove engine for Transom replacement or can I remove outdrive, cut fiberglass and replace from behind? Mercruiser 3L 1996 Bowrider. Is there a way to replace transom without removing engine? Thanks!
  15. boatdude100

    Winterize- Add Antifreeze then drain?

    mercruiser 3L 1995, alpha one - Winterizing Hybrid procedure? Please correct me if this sounds like a bad method: 1. Run to what is hopefully operating temp on Muffs with water 2. Remove thermostat (to make sure antifreeze circulates in case it was not at operating temp) 3. Drain Block - 2...
  16. boatdude100

    motor mount bolts fixed with brace?

    3L Mercruiser, Cutter (Grew) 1995. 2 bolts loose- no doubt rot. Rest of surface they are on seems fairly solid. Having a brace made. Question- 1.if I drill down is there likely a steel support or is what the 2 engine mount bolts go into usually just wood? 2. Any thoughts on the brace idea? it...
  17. boatdude100

    How to wire starter 3L mercruiser 1996 18-5911 Sierra

    Had a smaller auto starter on when bought boat. Bought Sierra 18-5911 starter. This thing is a beast!! (huge and heavy!). Anyways, the old one only had one post option for the small wire- this one seems to have 2! (and no diagram) One seems to be labeled R and the other S?? Q:Which one does...
  18. boatdude100

    Flywheel size for correct starter

    I am trying to match starter motor to flywheel. Not sure if its possible to count teeth on old (automotive) starter but I think I have found the part Teleflex Marine 18-6275 Starter (Sierra) 3L LX 1994 (serial numbers don't bring results) I read: If you have a staggered bolt pattern...
  19. boatdude100

    Correct starter motor 3L GM 1994

    I have the "small" (automotive) starter motor on this boat when I bought it this year, supposed to have the "bigger" one. I cant find a part number anywhere. Serial number tag by starter motor says 367647 stamped on block is 4097080. neither number seems to work in a search. Reason is, I...
  20. boatdude100

    Throttle Cable adjustment instructions please 1996 3L

    I'm trying to adjust idle with idle screw, but need to extend throttle cable a bit so screw comes closer/touches to cam. (I think this is what I need to do to slow down the idle when warm) How exactly do I do this? -There is a brass "nut" part way up the cable that looks like if turned, it would...
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