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  1. jimmbo

    45hp Chrysler Prop / Top speed mystery

    Looking in the 1974 Chrysler Brochure. Your engine has a gear ratio of 13:21 or 0.619. 45hp@4750 rpm A WOT range of 4400 - 5100 rpm 3 different ignition systems: Magnapower; Battery; Magneto 4650 rpm with the 11.5" would be 28mph with 10% slip and 26.8 mph with 15% 4440 rpm with the 12.5" would...
  2. jimmbo

    Propping for skiing

    Is the timing set to spec? Drilling the prop is an option, but it must be done with care with regard to location and size.
  3. jimmbo

    Suggestions for a 1978 TOP 900 coil

    Can the spark jump a 7/16" gap? On every plug wire? Are the carbs dribbling gas out of the vents when running? Are they all fully closed when at idle? Are the mixture screws all set for best idle. "Carbs cleaned before I got it" could mean last week or 5 yrs ago. I know what I call 'cleaning a...
  4. jimmbo

    Anyone know vintage merc 1000's

    i doubt the lower on the BP lower units will easily swap to a regular motor
  5. jimmbo

    What year is this Crestliner?

    This is from a 1961 Crestliner Brochure
  6. jimmbo

    Seeking information about older 2-stroke Mercury outboards

    The 49.7 block was introduced in 72 as a 65hp, in 73 they changed the Block(same displacement, but added a one inch hole in the piston skirt, which basically added another transfer passage between the Crankcase and Combustion Chamber. These Power Port and Power Port Pistons were added to the...
  7. jimmbo

    OMC prop choice

    It might affect the numbers. Which way? It could go either way Was the prop bent like that before you used it? If not. the numbers you gave were pre or post damage? Get the prop repaired,or get another 14 X 18, then see what it does, at least you will have a more reliable starting point...
  8. jimmbo

    OMC prop choice

    You're overrevving, provided the tach is accurate. Your engine has a WOT range of 3800 - 4200 rpm. You need to add pitch to get the rpms into that range. Whether you get more speed is unknown. Adding pitch means adding load, resulting in a lower RPM, so there might not be a speed increase. The...
  9. jimmbo

    Boat goes on sideways

    They are supposed to support the keel. A lot of trailers that use keel rollers don't have many rollers/supports to the sides
  10. jimmbo

    1983 90hp won’t idle

    If that doesn't fix it, then the Serious Troubleshooting can commence The idle speed adjustment is nowhere near the carbs, it is on the long Linkage arm/lever on the Port side of the engine, Word of caution, any time you fiddle with the idle speed, you will probably need to adjust/change the...
  11. jimmbo

    What trailer will I need?

    Years ago, the trailers were narrower, with smaller tires, the boats were just carried above the fenders Our 14 ft with a 70" beam on a late 50s/early 60s trailer This one had a 77 in beam, but the trailer was wider and the boat did fit between the fenders, but it was very close, though...
  12. jimmbo

    Gateway errors

    Site is acting weird. It appears I am in, but then Server Errors appear saying it at iboats end. I reload, and it is up, though in the upper right when my name should is blank, but I am logged in as I can post. Rebooting the computer offered no change. Any big Electrical Storms anywhere on the...
  13. jimmbo

    Need some advice on a possible prop purchase.

    In Stainless, an Enertia would be a very good choice on your combo. It has great Acceleration, and can give a higher top speed as well. It has a Tenacious Grip on the Water and will actually lift the boat Vertically out of the water. My Avatar shows it. The drive is not over trimmed
  14. jimmbo

    Stupid mistake: bravo III

    Definitely describes what you get when you get married. Later you will appreciate why Divorces are so Expensive. Cause they are Worth it
  15. jimmbo

    1963 Johnson 5.5hp

    a 1963 has a fuel pump, so single fuel hose. Mix is 24:1 TCW-3 oil.
  16. jimmbo

    Ahh the sweet smell of Pot at the Dock.

    This year it is certainly different, no more Clandestine Toking going on 500 ft from shore, just clouds of it at Dock. It does smell much better than having the Tobacco Addicts stinking up the Area. I guess if I could inhale enough second hand smoke, I could get the High, but at no expense
  17. jimmbo

    Idle question

    The last inline 6s that were crank rated were 1981s The idle speed adjustment is on the lower part of the the long arm on the Port side of the engine(red arrow), is that the one you are adjusting?
  18. jimmbo

    shifting bunk boards

    Normally I would say the boat is too far forward, but looking what the bunks are supported by, It looks like the Transom is almost directly above the support. Moving the boat back would place the heaviest part over the an unsupported piece of 2x4 or 2x6. So I would leave it there, and move the...
  19. jimmbo

    Another gripe about the Messages Page

    Another peeve about the Messages Page. Once there, it is now a many back clicking journey/operation to get back to the forums. A link that used to be there appears to be missing, At least I can't see one.
  20. jimmbo

    1981 Evinrude 35 With Electric Tilt

    There was a power tilt kit offered by OMC for the 35hp, 1976 thru... OMC part #173737 Source: 1981 OMC of Canada Accessories Catalog Parts Diagram
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