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  1. jimmbo

    Why is it still getting hot

    Manifold? Is this a Closed Cooling System? Is the overheat specific to idle, part Throttle, Wide Open, or all the time?
  2. jimmbo

    Help Identifying Boat! Fiberform

    Canadian made Fiberform. I will guess, from the Serial#, it is a 1971. Engine cowl is definitely a 79, and has the customized skeg version of the gearcase. It might be the camera, but the Transom looks a bit curved. Tilt the engine most of the way, then grab the lower unit, and see if the...
  3. jimmbo

    Crazy powerhead swap

    I think he is not a newbie on the board, but perhaps someone who has been or is facing a ban, and is trying to goad others into a verbal assault.
  4. jimmbo

    Help Identifying Boat! Fiberform

    Here is a link to a bit of info about Fiberform http://www.fiberglassics.com/library/index.php?title=Fiberform a 1979 Merc will have Cowl Decals like this
  5. jimmbo

    Crazy powerhead swap

    Tell you what. Perhaps You look up the engines part manuals, compare the listings, and maybe you might learn a thing or two
  6. jimmbo

    1983 evinrude 35hp shift rod connector

    Get the Part number from that site and call any and all Dealers near you, one of them might just have it.
  7. jimmbo

    Crazy powerhead swap

    If you would reread what I posted earlier... BTW, a Service Manual will not give the Specs for Port Height/Width, or Cylinder Head Chamber Volume.
  8. jimmbo

    Mercury Black Max 150hp outboard making weird sound

    The Decal looks like an early 80s one, could be an 83 That knock sounds Expensive Did someone drill a Hole in the Exhaust Housing figuring they would gain a Bunch of Horse Power? I ask, cause the engine doesn't sound like it is running fast enough to be forcing the Exhaust down and out the...
  9. jimmbo

    1987 MERCURY Black Max SR2

    That was one of the differences.
  10. jimmbo

    Crazy powerhead swap

    Engine Block is Different, but your mind is made up, facts will only cause you conflict.
  11. jimmbo

    Crazy powerhead swap

    The guy you quoted above, has forgotten more about those engines than you will ever know.
  12. jimmbo

    1987 MERCURY Black Max SR2

    In 1986, I saw the Power and Torque Curves for the Standard 150 and the 1st XR2. The XR2's power peaked higher(not by much) than the Standard 150, but at a lower Rpm, and the power was dropping by the time the engine was a attaining the Rpm where it was rated at 150
  13. jimmbo

    Modern Engine Thoughts

    I prefer not to handle that prop, it will likely burn my Hands, as Manure can get very Hot
  14. jimmbo

    Crazy powerhead swap

    The Diagrams are the same, but try looking at Part Numbers. Your top end went up a bit, but the Low End Torque dropped, because of the Bigger, Incorrect Carb. Just because the Engines have the same Displacement it doesn't mean that just a carb Carb change will upgrade to the Higher HP. Things...
  15. jimmbo

    Crazy powerhead swap

    No You haven't made your 25 into a 30 by changing the Carb, the Crankcase is different between the 25 and 30(likely Porting) What's wrong with the 40? if it id okay, buy it and use it
  16. jimmbo

    1987 MERCURY Black Max SR2

    I'm waiting for someone to chime in that the XR2 was 165 because that is at the upper end of what an engine rated at 150 can actually produce and still be called a 150.
  17. jimmbo

    Crazy powerhead swap

    Put the 25 carb back on, it will probably work better overall. How are you placing the extra people in the boat? Try putting some of the Weight further Forward To answer your Original Question, No 40 or 50 will bolt up to that Midsection, and even if it could, the Gearcase is not strong enough...
  18. jimmbo

    Modern Engine Thoughts

    A lot of places, take old Oil and Tranny Fluids, and Burn them in Furnaces to heat their Shops. Not really an Environmentally Friendly thing but they save money by not buying Natural Gas/Heating Oil, and also save money by not dealing with Recycling Companies. Profit before People/Environment.
  19. jimmbo

    Crazy powerhead swap

    2003 what? 30, 40, 50?
  20. jimmbo

    Crazy powerhead swap

    At the Dragstrip near YEG Airport, they have a Quarter Mile Track, not a 402.336 Meter Track If they shortened it to 400 Meters, Everybody's ETs would improve
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