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  1. jimmbo

    Raw water pump

    Is it a Genuine Volvo Part? Was anything else near it replaced as well?
  2. jimmbo

    Raw water pump

    Welcome to iboats Perhaps it is not mounted/attached to the Harmonic Balancer correctly Mine is a few yrs older, but it doesn't wobble like that
  3. jimmbo

    1987 mercury 45hp classic 50 shut off in the middle of running

    Examine all the Connections for Corrosion, and tightness
  4. jimmbo

    Water in the Lower Unit

    Mercury used to want a bit of Air in the Gear Case to allow for Expansion of the Oil as it warmed up in use. The Filling Instructions said to Fill till it came out the Vent, then let a tablespoon or so, out the Drain Screw, before Closing it up. Liquids can't compress, and if there isn't any...
  5. jimmbo

    1980'ish black max 150 losing all power after running for 30 minutes

    I guess the main Electrical Harness could be flexing/twisting when Motor is being steered
  6. jimmbo

    3L cobra idling too high

    700 in Neutral sounds okay the 550-600 spec would be in gear That said, what does your Owners, or Service Manual say? Messing with the Mixture Screws is not how you adjust the Idle Speed, except in some late 60s, early 70s Chrysler Cars/Trucks On the Marine Carbs, Idle Mix can set by highest...
  7. jimmbo

    Continuing Problem with 2021 VP 250 hp 4.3 DI

    How fast is that 4.3 spinning to get 250hp, 6500 rpm? Still it would be a pretty weak Hole Shot.
  8. jimmbo

    Water in the Lower Unit

    First Seal to fail is usually the one under the Water Pump, and the pressurized water is pushed into the Gearcase. Correction, the Seals that fail first are the ones on the Drain and Vent/Level Screws. I would refill the Case with Oil, use new Gasket/Seal on the Drain/Vent Screws use it a few...
  9. jimmbo

    Need Help with 1984 115 hp Trim / Tilt Decision

    Where is leaking badly from? 84 was the 1st for the Integrated Tilt-Trim system with everything mounted between the Transom Brackets. I recommend getting a Factory Service Manual
  10. jimmbo

    1980'ish black max 150 losing all power after running for 30 minutes

    Check the Float Levels, and Volume of Fuel Delivery
  11. jimmbo

    My boat needs to run real good on the 4th of July. FIX IT !!

    The Morons with the Wake Boats will be out causing Damage. Time to Take the Water back and away from them
  12. jimmbo

    Power Tilt Conversion

    It would be easier to find a used Engine, up to and including1983, with the Trim System, and just transfer over the Parts If it is on an 80hp, or 85hp 4 cylinder, or the Inline 6, it should fit.
  13. jimmbo

    NEED PROP ADVICE: '78 Johnson115 2stroke/ '82 Ranger 330V

    4500-5500rpm is the WOT Range As mentioned Above, 42mph at 5200 with a bit more Throttle is Meaningless. You/we Need to know what it actually is at WOT. Is the motor in good Mechanical Shape? Compression numbers, please Is the Spark properly advance at WOT? Are the Carbs fully open at WOT? Is...
  14. jimmbo

    1980'ish black max 150 losing all power after running for 30 minutes

    https://www.ebay.ca/itm/135866815044?_skw=mercury+150+2+stroke+service+manual&itmmeta=01JYM8DQG0K9ERMY2G853Q90QP&hash=item1fa24b1244:g:H3QAAeSwJ1ZoL7Xe&itmprp=enc%3AAQAKAAAA4FkggFvd1GGDu0w3yXCmi1cKJzgl3r%2Fu9BWNwlELFaePmPrWVU1JbhHI%2BZLuKqQF4kbYkTfS8mqVazwzJo9oa1K2wYcdOx4OfOMB3GFUVMsUJtLRpCcQUwZ3...
  15. jimmbo

    Mercury 80 won't crank with plugs installed

    Glad to hear you found the problem
  16. jimmbo

    What HP?

    110hp will be about 1 mph slower Regarding the Fishing, if you are fishing just beyond the Dock, even a 20hp would probably be fine. But if you have to get up on Plane to get to the Fishing, then very close to, or the Max would be wise
  17. jimmbo

    1980'ish black max 150 losing all power after running for 30 minutes

    I suspect an Ignition Issue, due to Heat, possibly Corrosion. Verify that all Connections are clean, and secure. Switchboxes in the 80s Engines were Prone to Failure from Heat. However, a Fuel Starvation can produce similar Action. A collapsed Primer Bulb happens when the Tank isn't venting...
  18. jimmbo

    Ignition timing

    So you have the Manual for that Specific Year and Model?
  19. jimmbo

    1991 Stratos 290SF Not great speed

    Looking at the Plugs, I would say the Carbs, need some attention: Are the Floats set correctly, and not lacking Buoyancy Are the Metering Jets correct and properly tightened? Correct Gaskets, O-rings in place? Is the VRO/MRO Pump working Proplerly? Is the Enrichment System for Cold Starts...
  20. jimmbo

    1978 Evinrude 140hp flooding after running

    Reed Valve? Why would you think that?
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