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  1. Replies
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    new brp controls on 49 cube

    is there a cheap easy way to adapt the new brp controls to fit the round red plug on a 49 cube omc?
  2. .

    Mine has the mounting bracket of the two cylinder johnson/evinrude. used the same steps as the link had. Had to a little machine work. I cut a 20 in mid down to 15 in. kinda tricky as the mid...
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    .

    compressor checked out. coolant checked out. their is a sensor in the dash that was bad.
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    too much

    ok......

    so that i can give you more info...


    when we hooked the gauge up to it, it was needing some coolant. I put a half a can approx 6 oz into it. compressor kicked on and blew cold air. ...
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    help with my cars air

    08 pontiac grand prix

    my air has not worked since last fall. So we put a gauge on it and it needed some coolant. I added about 16 oz of r134. compresser kicked on and started blowing cold air....
  6. Thread: in theory

    by river_ratj40
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    haha

    "Or the faster omc has some mercury parts on it"


    this could be the answer to it..................:p (hope not)


    and i completely understand how the set up, height, drag, impeller, even...
  7. Thread: in theory

    by river_ratj40
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    3,467

    in theory

    my question is concerning jet pumps, but it would relate to props as well. Thats how I will state the question.

    If two boats were identical, and two motors were identical, and two props were...
  8. Thread: battery

    by river_ratj40
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    early 90s

    my omc is an early 90s split port motor. the only electronics i run is tach and trim.

    So far so good with the lawn battery.
  9. Thread: battery

    by river_ratj40
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    2,340

    battery

    ive got a interstate battery, 340 cold cranking, 450 cranking amps.

    I also have a holly red fuel pump producing the fuel.

    I am unsure what the charging system puts out on the 56 cube omc, do...
  10. Thread: id tag

    by river_ratj40
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    id tag

    the id tag on the the mounting bracket has came off. its the sticker, 1998 omc 70hp. is there any replacing these?
  11. Replies
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    mercury model number

    I recently got a mercury motor. Sticker say 30hp. The serial number on the mounting bracket says a922585. The only cross reference that I could find started out with a922 says its a 35hp 1986...
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    yes

    weisco can make them, they dont usually advertise that. I have had a set. just used my last set up. I might know where a set is if you interested?
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    what mota is it?

    Just got my hands a little merc. (free) It says its a 35 horse. The tag reads
    a922585. I have not looked at the motor since getting it. Just wanting to know the model and year. is there...
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    Fuel and Oil (i know)

    ok, i know that the oil threads have been beat to death, so bear with me for a min.

    application
    60/40 johnson with outboard jet pump
    max rpms 6000
    bored .030
    175-180 compression

    everyone...
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    45

    depending on what you want to get out of it. Carbs, reeds, a little porting, and alot of compression. You can bump the compression up to 175-200#s and it'll wake it up. opening the exhaust will...
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    Sticky: reed

    on the 56 cu stock reed cages, how far can you increase the angle of the reed stops, using metal reeds.

    i know it dont help alot, but heard it helps.

    compare using metal reeds and increasing...
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    switch

    how do you have your on off switch. on the moto or in the boat?
  18. Replies
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    problem

    put a new rectifier on it and solved all the problems. i figure the old recrifier had some bad diodes inside.

    tach wrks now too...

    i know i havent built as many motas as you but everyone i...
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    new wire problem

    early 90s omc triple,

    on the terminal block

    top wire is yellow
    2nd wire is yellow w/ grey
    3rd wire is grey
    etc...

    top wire is yellow shows 7 volts on meter when key is off
  20. Replies
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    continue

    are you going to continue and show the paint process,

    do you do any pump mods or impeller mods?
  21. P.s.

    Has anyone ever written a book or lititure about this history. I would be very interested in just learning the history and tradition of the outboard motor.
  22. ok

    What years did the streamline gearcase and surface props really originate and who was the original engineer behind that technology?

    Once again,

    Thanks
  23. Please teach me, i have alot of stupid q's

    First of all I just want to say thanks for everyone on this site, i enjoy reading so much stuff on here. Everyone has been very helpful.

    I have not been around the outboard racing scene very...
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    great video

    great video, im excited to learn how these boats are made and perform. Keep up the good work
  25. Replies
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    check this out

    http://www.boatracingfacts.com/forums/showthread.php?t=6024

    in the jet section there are some awsome aluminum boats rigged with outboard jets, (really fast)
  26. Replies
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    boat

    This is my 17 x 48 x-terminator. made by legendcraft boats (legendcraft.com) is is custom made with 80 gage bottom and transom and 68 gage sides. they will make custom boats to order. the pic...
  27. Thread: omc 70

    by river_ratj40
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    omc 70

    can someone tell me how many amps my motor is suppose to put out = 1993 omc 56 cu?
  28. Thread: tach prob

    by river_ratj40
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    tach prob

    just got a teleflex tach. hooked it up to 56 cu johnson. when you start the motor all looks good. at wide open throttle the tach pegs out, then about a min into wide open throttle the needle...
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    ...

    what would be a better block then, a sst60 or to get a 90 hp yammi?
  30. Replies
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    my afterthought

    got myself ahold of a extra block. 91 or 92 omc 3 cyl. 56 cu split port block. wanting to do something extreme. Like to put 3.5 inch piston and stroke it. can it be done? How far can you stroke...
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    jet boat races

    http://i37.tinypic.com/330wy8k.jpg
  32. Replies
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    Please help

    can anyone help me identify what model and year this omc 3 banger 56 ci block is?
  33. Replies
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    new block?

    i purchased a new block for omc 56ci. the numbers on the tag read g2579447
    can anyone tell me the year of the block and if its split port? i believe it is a 70 hp, but not sure? any help would be...
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    thanks

    as always, you guys are great!


    thanks
  35. Replies
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    help identify motor

    70EL79R

    What year is this motor?
    Is this a 49 cu in motor?
    Is there a quick referance anywhere to help identify these types of motors for future referance?


    thanks
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    i figured

    figured that about the reed stops. i have built and seen some 60 hp evinrudes, how much difference is there between a built evinrude and a built yammy. also do they make a light flywheel or do you...
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    .

    fred,
    is there some different rods to put in the 90 case that will help out with drag perfomance.

    also, its a rumor, a reed cage that uses metal reeds that allows it to open up more than fiber...
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    yama-drag90

    im looking to build a 90 hp yam gravel bar drag motor. il put it on a 16 ft, .60 guage alum jon boat. my boat already has a tall transom, so i will probably keep a 20 mid on the motor with t/t. im...
  39. Thread: sst60-19f

    by river_ratj40
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    sst60-19f

    i read a data sheet that said omc made these in 1995. Why didnt omc make a race mota with power trim?
  40. Thread: tach help

    by river_ratj40
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    1,816

    thanks

    thanks for the info, i really appreciate it...
  41. Thread: tach help

    by river_ratj40
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    1,816

    tach help

    i just bought a teleflex tach to go on my 81 2 cyl omc. is there any way to make a home made tach harness from my console to my motor. if there is how would i do this. any help is great.

    thanks...
  42. Thread: timing

    by river_ratj40
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    2,003

    timing

    i got a 2 holer evinrude, about 150 #compression, big carbs. whats the max timing i can get out of it. most things say about 21degrees. but someone told me he was running 27degrees. any help on...
  43. Thread: exhaust

    by river_ratj40
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    16,072

    .

    If You Cant Drive It Wide Open, Dont Drive It All!
  44. Thread: exhaust

    by river_ratj40
    Replies
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    16,072

    dont fed x

    i had a neighber order a set of fourwheeler wheels. he got 2 through fed x, lost one during shipping, and found one on the side of the highway going home. that would suck...
  45. Thread: exhaust

    by river_ratj40
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    interesting

    Fred...


    im interested in the 2x4 for the 2 cyl. if you get it.;) just let me know. good luck with the ups dude...
  46. Thread: exhaust

    by river_ratj40
    Replies
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    16,072

    2

    ive got two motors. a 98 model 56 ci johnson, and a 81 model 2 cyl evinrude. both with very different exhaust. ive seen the tunners in some big v-6 moters and a mod50 tunner. i was wanting to know...
  47. Thread: exhaust

    by river_ratj40
    Replies
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    16,072

    just thinkin

    is there any way to figure out how long and wide to make your tunner for a 3 holer, other than the try and fail method.
  48. Thread: exhaust

    by river_ratj40
    Replies
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    16,072

    exhaust

    i have read articles and books related to exhaust tunners and expansion chambers, and i have a pretty good idea how an expansion chamber on a 2 stroke motorcyle work. what i dont understand is how a...
  49. Thread: 50 hp

    by river_ratj40
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    omc 2 hole

    omc 2 hole, major horsepower, minor motors, carbs and exhaust is the cheapest way. you might set your time up, it seems like you have the compression numbers about right. those motors can run...
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    im not

    im not saying gm is better than ford or chrystler. im wanting to know why bombardier and averyone else is not trying to produce a performance mota.
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