Search:

Type: Posts; User: oledawg; Keyword(s):

Search: Search took 0.00 seconds.

  1. Replies
    23
    Views
    16,411

    SST 45 Cowl

    How do you know the SST-45 cowl will fit over the E-Tech 60 hp? Are you talking about the SeaWay cowl or the OMC SST-45 cowl?
  2. I agree that the minimum T-750 weight is to...

    I agree that the minimum T-750 weight is to light. Most boats weigh 250-260 lbs. or more. ( The Rossiter Critch is 225 lbs. w/o the 16 lb. cowl.) The rigging weighs 75-80 lbs. I know since, I just...
  3. 4-Strokes for racing

    Aside from using a laptop to modify fuel delivery & timing curves on 4-strokes, mechanical mods would be required. The motors with removable heads can increase compression by milling head surface....
  4. Replies
    6
    Views
    4,538

    :) If the carbs also have intermediate air...

    :)

    If the carbs also have intermediate air bleeds, you will start with .065's for hi-speeds, and 2 1/2-2 3/4 turns on the idle screw. Without the intermediate air bleeds, I would stay with .073's,...
  5. 75 HP Stinger

    Did you check the reeds as suggested earlier? That will definitely cause poor idle and mist coming out the intake of the carb. The backfire is caused by a lean condition, which the reeds can create...
  6. Replies
    15
    Views
    7,548

    Also, the reeds can't give too much air. The air...

    Also, the reeds can't give too much air. The air is controlled by the carb size. The improved reed flow merely allows what the carb has to offer to enter engine better. The fuel/air ratio is set by...
  7. Replies
    15
    Views
    7,548

    OMC Orifice Plugs

    :)

    Sounds like your too rich on the IS air jets. Try going to a larger IS to lean down mixture. The 71D's on HS are way too much. If I had to guess, I'd go 55-56 HS and 50-54's IS. How is throttle...
  8. Replies
    15
    Views
    7,548

    The larger the air jet, the leaner the mixture....

    The larger the air jet, the leaner the mixture. You are adding more air to the same fuel delivery.
  9. Replies
    15
    Views
    7,548

    Orifice Plugs

    :) Hi Fred, Yes, I know the "C" & "D" has to do with flow direction, but what is a 1/4"-20 hi speed jet with no letter designation? There are three: Ex: 73D, 73C, & 73. To straight 73 has no counter...
  10. Thread: 55hp johnson

    by oledawg
    Replies
    11
    Views
    7,819

    You will need the 70 hp adapter plate to...

    You will need the 70 hp adapter plate to accommodate the exhaust outlet and tuner requirements of the 49.7 or 56
    .1 cid motors. The splines are different as well. The 49.7 & 56.1 cid early models...
  11. Replies
    15
    Views
    7,548

    OMC Orifice Plugs

    :confused: Can someone explain the difference between a "C" & "D" hi speed jet for OMC motors. There is also a hi speed jet with no letter designation. Those have the jet size running all the way...
  12. Replies
    0
    Views
    2,154

    OMC Orifice Plugs

    :confused: Can someone explain the difference between a hi speed OMC jet labeled "C" vs. "D"? Also there is the same jet with no letter designation. They have the jet size all the way through the...
  13. Replies
    75
    Views
    32,983

    7.69" from the powerhead mating surface to the...

    7.69" from the powerhead mating surface to the end of the tuner.
  14. Thread: Yamaha 60 c

    by oledawg
    Replies
    25
    Views
    9,956

    Thanks Paul. See ya' soon.

    Thanks Paul. See ya' soon.
  15. Thread: Yamaha 60 c

    by oledawg
    Replies
    25
    Views
    9,956

    You do not want a cleaver prop. Stay with a round...

    You do not want a cleaver prop. Stay with a round ear that will carry the bow weight.

    Hydromotive Engineering
  16. Replies
    17
    Views
    10,394

    Yes, you can use the crank from the 3 cyl. 55hp...

    Yes, you can use the crank from the 3 cyl. 55hp as long as it has the 4 tooth spline. I'm sure it does. Just be sure to run the 1.86:1 ratio.
  17. Replies
    17
    Views
    10,394

    Kevin is right on the mark. The Nitro case is...

    Kevin is right on the mark. The Nitro case is 1.86:1 ratio, so you will not over rev props. There are some 2.42:1 Nitro cases used on the OMC, 2 Cyl. motors around 50-60 HP. You of course, do not...
  18. Replies
    17
    Views
    10,394

    Why don't you just use a Nitro gearcase from a...

    Why don't you just use a Nitro gearcase from a 49.87 cid Stinger 75hp, or an SST-60 gearcase? You will gain 3-5 mph with the smaller diameter case, and the 4 tooth spline and shaft will bolt right up?
  19. Replies
    75
    Views
    32,983

    Thank you Fred. Sounds like the way to go.

    Thank you Fred. Sounds like the way to go.
  20. Replies
    75
    Views
    32,983

    Hi Fred, What do you expect will happen when you...

    Hi Fred, What do you expect will happen when you raise the boost ports to the same height as transfer ports? Will that change the power curve upward? Will it help top end HP, but hurt bottom end?
    ...
  21. Thread: Ziggy Boettle

    by oledawg
    Replies
    1
    Views
    2,589

    Sorry to hear of Ziggy's passing. I knew him from...

    Sorry to hear of Ziggy's passing. I knew him from OPC races in the late 80's & early 90's. We were racing SE & SST-60 during that time.

    Thom Bucknell
  22. The SST-60 is a Bridgeport motor with the angled...

    The SST-60 is a Bridgeport motor with the angled upper lip on the exhaust ports. The port timing on the SST-60 is different then the stock 70 hp. The SST-60 also uses 1 1/2" bore carbs without the...
  23. Replies
    10
    Views
    15,365

    Prop Diameter

    :)You can easily run the blade tip to within 1/4" of the cavitation plate.We have come even closer than that. This information comes from 30 years of manufacturing and testing propellers.
Results 1 to 23 of 23