Recent content by oldrudedude

  1. oldrudedude

    How do I tell if the water pump impeller is working on my 9.8?

    I just purchased a 9.8 hp merc from a friend. He never had it running. He bought it last year from a neighbor. I put it into a bucket of water today and fired it up. It runs well but after running for a few minutes the powerhead and lower leg seemed to be getting quite hot. There does not...
  2. oldrudedude

    What year is my 9.8?

    The number on the cowl is 9.8 The serial number is A704410. What year is it and is it really a 9.8 hp? Thanks
  3. oldrudedude

    1962 10hp QD-23R What oil mix does it need?

    I'm looking at buying a 1962 Johnson 10hp Model # QD-23r The seller says it has good spark and the compression is 120psi on both cylinders. Do these engines have any issues? What fuel/oil ratio? Thanx
  4. oldrudedude

    Trouble removing the LU

    1979 Johnson 140 The powerhead is blown so I am removing the LU for parts. I have: 1. Removed the bolt under the carbs holding the shift rod 2: Removed the trim tab bolt as well as the bolt that the trim tab hides 3: Removed The other four visible bolts securing the LU I have managed to...
  5. oldrudedude

    What is performance difference between these two props

    I have two props: - One is -----------> 12 3/4 X 23 - the other is -----> 13 3/4 X 15 - The 23 is a much more agressive pitch but the diameter is smaller. How do I calculate top speed difference and/or hole shot performance? The 13 3/4 X 15 is presently on my 16.5 deep V bowrider with...
  6. oldrudedude

    What is torque spec on propeller shaft castelated nut?

    The propeller shaft nut on my '71 Johnson 100hp is a little loose. What is the proper tightness? I have the factory manual but it is not stated.
  7. oldrudedude

    Has anyone made their own skeg guard?

    This is what the skeg looks like on my 1972 Johnson 100hp. Pretty chewed up. Looks like someone dragged it down the road for awhile. I have seen skeg guards online for $100-150. They look like folded SS plate. I have some light gauge SS plate that would work. I think I'm up for it. Has...
  8. oldrudedude

    Another milk in foot question

    1971 Johnson 100hp electric shift I changed the type "C" fluid in the lower unit a couple of days ago and noticed the old stuff to be milky. Checked it today after the weekend in the water and noticed it to be milky again. On inspection I noticed a smudge of oil at the bottom of the prop...
  9. oldrudedude

    How much throttle cable shoud I have in splash well?

    I have installed a 1971 Johnson 100hp with original controls on my 16.5ft bowrider. The motor was from a longer boat so I now have way too much throttle cable in the splash well. It loops entirely around the splashwell before going into the motor. I want to cut it shorter but am not sure how...
  10. oldrudedude

    Is there too much play in my steering

    My 16.5 ft bowrider has Teleflex rotory stearing. The wheel turns about 3 inches before there is any movement of the cable at the motor. This feels way too sloppy to me. Is this normal? If not is there a way to tighten it up at the helm unit? If not is it because of wear of the cable, the...
  11. oldrudedude

    adjustment screw on 1972 OMC power tilt, what is it for?

    I have a 1972 Johnson 100ELS72. It has an OMC power tilt (at least that is what it says on the power switch). I have a factory manual for this motor but the manual makes no mension of the power tilt. There is an adjustment screw on the lower aft aspect of the pump/reservior unit. What is...
  12. oldrudedude

    bow eye in relational to bow stop?

    Where should the bow eye sit in relation to the bow stop? The trailer of my 14.5 is set so that the eye is tucked tight under the bow stop. The trailer of my 16.5 is set that the eye is several inches below the stop. The winch strap on the 16.5 is pulling upward on the boat. What is the...
  13. oldrudedude

    A few setup questions for the trailer gurus

    1. How much tongue weight should I have on my hitch? I can currently pick up my tongue with one hand and wheel the boat and trailer around the yard. I have not noticed any squirrely handling when towing. 2. Where should my transom sit in relation to the most rear roller/bunk? I have a...
  14. oldrudedude

    What does a whale tail do?

    Yes, I have heard the manufacturers' claims. Better hole shot, plane faster, better cornering, bla, bla, bla.... I would like to hear what changes actually happened to handling and performance after people installed them. The reason I am asking: My '71 50hp 'rude, with manual trim, had...
  15. oldrudedude

    How stabil is fuel stabilizer?

    I have a bottle of fuel stabilizer that has been in basement unopened for about 10 years. What is the shelf life of this stuff? Do you think it is still good?
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