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  1. jimmbo

    Outboard ran without water for about five minutes

    Maybe you got away Lucky, but time will tell, redo the Compression Test after about 20 hours on the Engine
  2. jimmbo

    Prop for Evinrude V4 crossflow

    That engine weighs about 300lbs. I find it difficult to believe that a 15 1/2" even with 30 gallons of Gas and a Battery, weighing 1500lbs. You might have waterlogged Foam in it This 15 1/5 was 950lbs and this 16ft was 810lbs
  3. jimmbo

    Prop for Evinrude V4 crossflow

    It looks more like a 14ft. What's the Boats Beam?
  4. jimmbo

    83' 115hp Mercury, prop slip

    An 83 115 has a WOT Range of 5000-5500. The Last year an Inline 6 had a 5300-5800 WOT Range was in 1981, on the 140hp The best way to improve Efficiency is to reduce Weight. Getting rid of unneeded Weight, like Wife, kids, Mother-in-Law, especially the MIL, will help a lot. Mistresses and...
  5. jimmbo

    Prop for Evinrude V4 crossflow

    If you are doing 45mph with a 21" Prop, you are turning about 5000 I would check the Setting on the Tachometer Must be a Very Light, and I mean Very Light, 16ft to get that speed with an 82 90hp Even Glastron's light little 15 ft, got about 42mph with an 82 90hp
  6. jimmbo

    What’s this small tube do? Pics incl.

    A water Pressure Gauge will measure speed over the Water, which is better for Skiing on a River, than a GPS which which only measures the speed over the River Lake Bottom, and can't take current into account.
  7. jimmbo

    What’s this small tube do? Pics incl.

    The Pressure Speedo is measuring the Speed across the Water, doesn't matter if the Water is moving. GPS will measure the Speed across the Lake/River Bottom. I can see many people bragging how fast their Boats are, using a Distorted GPS Reading, cause of a Current.
  8. jimmbo

    Point setting vs timing

    99.9% of the Time, setting New Points @0.020" will get you the Correct Timing. Using a Flat Feeler Gauge on used Points, all bets are off, and the Timing Marks and a Continuity Meter/Light are a better choice
  9. jimmbo

    What’s this small tube do? Pics incl.

    Don't put too much Faith in GPS, as it is measuring Ground Speed, and doesn't take a Current into consideration. Boating on a River, in one direction the GPS may read 45mph, and in the other 25mph, when the Current is 10mph.
  10. jimmbo

    What’s this small tube do? Pics incl.

    Welcome to iboats That Hose sticking out of the Motor is the Pitot Tube Hose for Speedometer Water Pressure. The Hose zip tied to Trim Wiring Harness, likely the Hose going to the Speedometer Gauge
  11. jimmbo

    Conversion from I/O to outboard on Islander.

    Few Fiberglass Boats use Knee Braces, They rely on the Glass around the Transom combined with the Motor Well on Outboard Models and Hull Cap on Inboard Models, combined with the Engine being bolted to the Stringers and to the Transom, which may or may not be full Width, to be the Transom's...
  12. jimmbo

    How much Prop should i try?

    a 4th blade will certainly load the engine more, and kill top speed by several mph below what a 3 blade would do. Having the WOT range of both engines will certainly be of help, in making guestimates
  13. jimmbo

    How much Prop should i try?

    First of all, what are the WOT Rpm Ranges for both the Old and the New Engines? What WOT rpm were you getting with the Old Engine? If the new Engine has a WOT Range that is higher than the old engine, you might not need a pitch change. Now switching from One Prop Line to Another, often isn't as...
  14. jimmbo

    Transom replacement or design flaw?

    A Strip of Right Angle Aluminium along the Board bolted thru the Transom will certainly stiffen it, another along the Top of the Transom, would also raise the motor a 1/4" or so too
  15. jimmbo

    !/2 ton Truck towing limitations

    That doesn't take Weight off the Rear Axle, moving it to the Front, which what a WDH does
  16. jimmbo

    1977 Mirrocraft V-hull repairs

    Welcome to iboats Looks like a 14' Deep Fisherman from the late 70s. We had 2 of them in the 80s The Pressure Treated Wood used to replace the Transom, wasn't the Best Choice, and likely caused the Corrosion Marine Grade Plywood, epoxied to the Correct Thickness should last at least 20 years...
  17. jimmbo

    Jonsson 235v6 78vm

    At least One Cylinder is scored. What's with what looks like Grease on the Crankshaft Bearings?
  18. jimmbo

    TEMU adds

    Did you click on a Link that was in one TEMU Posts? Might have installed Malware
  19. jimmbo

    cracks around bolt holes transom

    Being that there are cracks several inches away for the Bolt, I too will assume that that Core has deteriorated. Or was crushed by an Overzealous Rigger with an Impact Gun, and the Glass has succumbed over time
  20. jimmbo

    Just thought I'd share a nice photo.

    Typical Dec - March weather for me
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