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  1. jimmbo

    Proper prop?

    First of all, what is engine are you talking about? What is the WOT Rpm Range for that Engine? https://forums.iboats.com/threads/read-this-first.282907/
  2. jimmbo

    1998 Johnson 175 Ficht Not Starting

    Major Overheat... Well, that could account for the Less than Good Compression Numbers
  3. jimmbo

    1998 Johnson 175 Ficht Not Starting

    That one didn't get the 2001 Powerhead, as it still the Air Cooled ECM on the Top. The replacement Powerheads had the Water Cooled ECM. This one likely had the Cylinder Heads replaced, and several Reprograming. These Engines suffered from Carbon getting in Ring Grooves and behind the Piston...
  4. jimmbo

    Rebuilt Water Pump Pee question

    All the Water Passages may take more than 10 seconds to fill Which 115 do you have, the 99cu in Crossfow, or the 60 degree Looper? You did make sure the Water Tube was inserted into the Grommet on the Water Pump? The Key for the Impeller was in place?
  5. jimmbo

    1998 Johnson 175 Ficht Not Starting

    It is a 98, and there were many Issues with those Engines. There were a lot of Updates, including complete Powerhead Replacements. The replacement Powerheads were Complete 2001 Powerheads and there were many things different. A few pics of the Powerhead, with all the fancy plastic covers, held...
  6. jimmbo

    Another gear oil thread... 80w-90 vs. 90

    A lot of Marine Gear Lubes are 75 No, Every Diff I have ever had was Vented, thus not Sealed. Ask anyone who ever submerged the Diff and Vent Hose at the Boat Launch, they usually were replacing Bearings within a few Weeks
  7. jimmbo

    Another gear oil thread... 80w-90 vs. 90

    Being that Marine Engines have such small Gears, the Marine Gear Oils may contain more EP additives to reduce the Wear on the smaller Contact Areas of those Gears.
  8. jimmbo

    1980 Evinrude 35hp water pump replacement help

    1980 was the 1st Year it was located there.
  9. jimmbo

    96 evinrude 20 hp runs rough mid range

    That Motor does not Need a Battery to Run. When you rebuilt the Carb, did you make sure to check and adjust, if Necessary, the Sync between the Carb and Ignition Advance? Again to the Carb, When you "Cleaned it", did that include removing the Disc Plugs and cleaning the Areas behind them? Did...
  10. jimmbo

    Customer advice

    Why 0.030" over? There are 0.010", and 0.020" Pistons as well. Being that it got hot, checking the Head for Warpage is another thing needed
  11. jimmbo

    89 Mercury Classic 50 won’t open up

    It would have been nice to know about that little Tidbit...
  12. jimmbo

    Math problem

    I was, and will always be Proud, to Smoke up an Area with the Beautiful Aroma of Burnt TCW....
  13. jimmbo

    Changing props. What one to get?

    I doubt you will lose much, if any Speed. Though the Pitch is less the Rpms go up, and since you are at the Bottom of the Rpm Range, the Motor will be making more HP as Revs increase. In the 50 yrs I have been swapping Props, I found that within a Given Prop Line, there isn't too much...
  14. jimmbo

    89 Mercury Classic 50 won’t open up

    These engines keep the Throttle mostly closed until after the Timing is Fully Advanced. The Pick Up timing is where the Plates are permitted to crack open a tiny bit, then more Throttle Lever movement advances the Timing further with the Carks open a wee bit along the way till it hits Max...
  15. jimmbo

    Why I'm nervous boating at night...

    40 or so Yrs ago I used to take my boat out at my Dads Lake, roar around at 50mph, on Nights with a Full or almost Full Moon. My Dads Girlfriend commented that it really looked like I was going faster than that. She also asked how I was able find my way back to the lot. I told her, that I just...
  16. jimmbo

    Why I'm nervous boating at night...

    Once I had my Cataract Surgery, Night Driving was much Easier I even got a Lens that corrected my Astigmatism, though I had to pay Out of Pocket, for that, as it wasn't covered by Healthcare. The Regular Lens was No Charge. I did get reimbursed by my Insurance for the Special Lens, though they...
  17. jimmbo

    89 Mercury Classic 50 won’t open up

    There is No Idle Timing spec on your Motor. Idle speed is set by changing the Timing, which will vary upon the Load the Motor has on it. When you adjust the Idle Speed, you will also have to adjust the Length of the Throttle Cable Do you have the Factory Service Manual for that Motor? I suggest...
  18. jimmbo

    89 Mercury Classic 50 won’t open up

    A 15" sounds a bit on the Hi Side, an 11 would be closer to what you would need on that boat
  19. jimmbo

    89 Mercury Classic 50 won’t open up

    Okay, so you(and previous Owner) were messing with the Sync between Spark Advance and Carbs. Have you verified that the Spark is Advancing as per Spec, and that the Pick Up Timing is Correct? Racers' Comment about the Prop is Valid. What kind of Boat is the Motor on, and what is the current...
  20. jimmbo

    Math problem

    That was the Cowl Decal for a 76
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