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  1. jimmbo

    mercury 45 hp classic 50 hp classic

    The Power Port was used on some production engines starting in 73(it was used on competition engines prior to that. It added an extra Transfer passage directly from the crankcase(in addition to the regular transfer passage, thru a one inch hole in the Piston to a Trough in the cylinder wall that...
  2. jimmbo

    Need help selecting ~19’ Stingray sport boat with 5.0/5.7

    I have a 2002 Glastron Sx 195 here are a couple of Pics of it going by And a couple of videos https://www.youtube.com/watch?v=5WBf2D0103Y https://www.youtube.com/watch?v=VepbXm5RFDI
  3. jimmbo

    4.3GL blowing milky oil out the breather

    Here's one I saw at the dealership on the Weekend
  4. jimmbo

    MW Super Prop...remember these???

    Michigan did indeed market props painted in a very sharp Blue From a Michigan catalog
  5. jimmbo

    Will My Boat work?

    If it is a 9" It will have blades as big as Dumbo's ears. At least that's how I remember the one I saw in 1974 Here is the Prop chart for the engine, from the 1981 OMC accessory catalog. I always found it to be a little Optimistic on the what size of a boat each pitch could handle. We found a...
  6. jimmbo

    76 Johnson 85 hp V4 runs on 3 cylinders

    What condition is the Wiring in prior to the Coils? You might have a bad CD unit Maybe you have already seen this, but here a wiring diagram for your engine On a side note. There is a flaw in the diagram as I think there should be a jumper between #6 and #7 on the Terminal Block, otherwise...
  7. jimmbo

    Will My Boat work?

  8. jimmbo

    Leaking 1969 Evinrude 18hp outboard

    Definitely a 10hp
  9. jimmbo

    Will My Boat work?

    When I was 14, I learned to waterski behind a 14 ft Skagit with a 1963 40 hp Johnson. 3 weeks later I was slaloming and a did several deep water starts on the Single Ski. I would guess I was about 145 lbs. Our Skagit had a very wide Transom, which help pull up skiers. Next year we got a bigger...
  10. jimmbo

    Need help to identify year of Mariner 115 hp

    White arrow pointing to Air Silencer. Mercury often had a Decal/Sticker with Year, HP, Max Timing, and Pickup Timing listed on it
  11. jimmbo

    Tongue Weight - Insight or Folly?

    Mine is about 3400 lbs and and I have about 120 lbs on the hitch and it doesn't fishtail at all, even at 130/kmh(80 mph) Is the axle straight? Is it 90 degrees to the Centerline of the trailer? Axle centered relative to the Trailer Centerline? Is the trailer Level, or very close to level, when...
  12. jimmbo

    The old "enough water in barrel" question

    This was what I was saying to look for. Not that it matters at this point. Never saw one near the carb. I'm sure others were expecting it to be here too
  13. jimmbo

    Evinrude 33hp Fastwin weight?

    The brochure says 127 for manual, 140 for Electric, both of those would be for short shaft, long shaft probably about 4 ibs more
  14. jimmbo

    Ok to shorten trailer's arm?

    If you move the boat forward, you would want to move the bunks forward as well, some trailer are designed for that, by allowing the crossmembers and therefore the bunks to move, Of you place the boat too forward on the bunks the forward part of the hull be supported. My Trailer came from the...
  15. jimmbo

    Merc1150 in-line 6 cooling issues

    Is water coming out of the horizontal slots just above the Anti-ventilation Plate? The prop? What condition was the old impeller? Those engines have simple cooling system, and water pretty much has to go thru the block first. The flow pattern i the block is very simple Water enters the bottom...
  16. jimmbo

    just an enthousiast threat - 75 hp on a 14 foot piece of plastic

    I had a 140 on a 15 footer, it handled ok
  17. jimmbo

    84 90hp mercury inline 6

    You say the engine is an 84, I will assume it has a control box like this On this type. there is no separate Fast Lever. To utilize a Fast Idle control, You press the square shaped button located on the Lever's pivot point. That will disengage the Gear Shift and allow the throttle to be...
  18. jimmbo

    Johnnyrude 25 2 strokes?

    Well the Non Thru Hub model does perform a bit better in reverse, but in forward the Thru Hub version is better. More advanced Prop Design regarding Blade Shape and Rake. The gears themselves are larger and stronger. We had a 1979 25hp and a 1980 35hp, on identical boats(14 ft car toppers) . Top...
  19. jimmbo

    Mercury 140hp. Serial number 3424016

    Number 6 can be a pain. A different Compression Gauge might work better at getting in, the other way is a pain and requires removal of the front and rear cowl supprts, to tilt the pan out of the way(I was replacing the waterjacket cover gasket in this pic, back in 87). The numbers you gave good...
  20. jimmbo

    New to me Mariner 115 with oddball S/N 5794485 ?

    Fast Idle Lever? I think the control boxes from 1980 till about 1990, didn't have a dedicated idle lever, but used the 'pushbutton to disengage the gearshift from the throttle lever' system. ​​​​​​​
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