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  1. jimmbo

    Changing props. What one to get?

    "Probably" really is nothing, just an Assumption. Have you ever Weighed it at a Scale? Take it, put it on the Scale, unhooked from tow Vehicle. You will need to subtract the Weight of the Trailer, Manufacturer should be able to provide that info, or when the Boat is in the Water, weigh the Trailer
  2. jimmbo

    Changing props. What one to get?

    What is your Engine's WOT Rpm Range? How Heavy, as in, is it Full of Water? Even Allowing for the Altitude, your speed seems Low
  3. jimmbo

    Prop questions on a 16' 1976 StarCraft Montego (Merc 888)

    I liked that Hull, Starcraft also made a 15ft Outboard Version of the Hull, which was Flipped by a Canadian Boat Maker back in the Late 70s
  4. jimmbo

    Prop questions on a 16' 1976 StarCraft Montego (Merc 888)

    My Comment is basically, why was the Old Carb getting all Dirty, and unless the Reason wasn't corrected, a different Carb would suffer the same Fate. It puts you right in the Middle of the Range, which is fine. I don't know if the Boat was lightly Loaded, Heavily Loaded, or loaded like you...
  5. jimmbo

    Prop questions on a 16' 1976 StarCraft Montego (Merc 888)

    If the Original Carb was getting Gummed Up, and not staying Clean, how is a Different Carb going to be any Different? You choose a Prop by making sure it runs in the WOT Rpm Range stated for the Particular Engine, which in your case is 3800- 4200 rpm. You DO NOT Prop for Targeted Speed at any...
  6. jimmbo

    Tachometer not working right

    That's not what I asked
  7. jimmbo

    Tachometer not working right

    If 2 tachs aren't working, I suspect either both were fried by your Engine, or both weren't getting the correct Signal. You say the Rectifier is Good, then the Stator might be having an Issue Just out of Curiosity... How long have you had this Motor?
  8. jimmbo

    Buy a 5hp Mariner with a blown head gasket?

    A another added Tidbit, that would have been nice to be told about initially A nice New Inlet Seat and Needle can still provide the wrong Fuel Level if not set Correctly, or the Float has absorbed Fuel. What condition is the Float? Is it Cork, hollow Metal, or a Plastic Material? All of the...
  9. jimmbo

    Yamaha 130 v4 idle mix screws

    So Yammie, because they couldn't get a Carb with Air Holes in the Throttle Plate, have created a way of really getting an Engine, especially a Multi Carbed one, difficult to tune. More Proof that the Proper Service Manual is Needed, and NEEDS to be read, as I have never seen a Carb on a 2...
  10. jimmbo

    Cracked intake manifold

    How's the Oil, and its Level? Core Plugs didn't pop on this one either
  11. jimmbo

    Cracked intake manifold

    Which Engine? Where is it Cracked? Why did it Crack?
  12. jimmbo

    Buy a 5hp Mariner with a blown head gasket?

    A good Carb Idle Mix Setting, is one that Idles well and is Rich enough to prevent a Bog/Stumble when Accelerating. There is an Initial Setting, on the Rich Side, but still within a Combustible Range. The Correct Float Setting is Critical, as it sets the Fuel Level, and too low or too high will...
  13. jimmbo

    Prop ID

    Turning Point does have a Lineage of Props they call Patriot. Check their Website. The 8964, might be from a Propeller Rebuilder
  14. jimmbo

    Just thought I'd share a nice photo.

    Probably the distant Descendent of One
  15. jimmbo

    Tilt and Trim 150hp Mercury v6

    It will drop slower when in the water, than when on the trailer. That will vary depending on how much resistance the Prop provides, Factors there are Blade Area, Pitch, and whether the Engine is in Gear or Neutral. Personally when I was running the Engine with an almost Dead Battery, I just...
  16. jimmbo

    Why I'm nervous boating at night...

    In 76 I hit a Pole Floating in the Water, at about 30mph.
  17. jimmbo

    Guess Who needed a tow home ?

    The Retardation of the Spark Timing is what set the Idle Speed, there is no Spec, at it will vary depending on the Load the Engine is subject to. Which means a change in Prop Pitch will result in a different Idle Speed and an Adjusted will likely be needed. OMC Engines in that HP Range were easy...
  18. jimmbo

    Guess Who needed a tow home ?

    They did use the older 20/25 Mids and Cases Over Hub Exhaust? I think you mean separate Exhaust Snout
  19. jimmbo

    Yamaha 130 v4 idle mix screws

    An adjustable Air Bleed is all it is. It is unlike an Idle Speed Control, though I'm sure it has been misadjusted to achieve that Purpose
  20. jimmbo

    Just thought I'd share a nice photo.

    I've driven beside many Pelicans, it is Impressive when they trade Speed for Altitude. Hell of a Wingspan, on those Buzzards Took this about 20 yrs ago, not flying just paddling away from me This was about 45 minutes from home. Didn't take this Pic
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