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    4 stroke gearcase on a 2 stroke outboard

    Does anyone know if a 4 stroke gearcase will fit an older 2 stroke outboard. Specifically a yamaha 90hp? Trying to get away from the older 2 stroke 90 cases that are known to crack around the hub.
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    Those are just the bleed lines that take mixed...

    Those are just the bleed lines that take mixed gas that builds up in the c/case back to the intake.
  3. you're going backwards if you are wanting speed....

    you're going backwards if you are wanting speed. The nitro case is already 3.5inch exhaust hub diameter. Also I believe that the length of the midsection where both the face of the gearcase and the...
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    If you can pull the head easily, you can look at...

    If you can pull the head easily, you can look at your piston wash and jet accordingly.
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    I've kept up with a boat on screamandfly thats a...

    I've kept up with a boat on screamandfly thats a 13ft tunnel with a yamaha v4. He runs et props because his motor height is too high for a cleaver to grip.

    Can you squeeze a bigger diameter prop...
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    How does that semicleaver do on it?

    How does that semicleaver do on it?
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    You may want to see what Ron has to offer.

    You may want to see what Ron has to offer.
  8. Thread: Boat set up

    by omcstratos
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    The more setback you have will result in more...

    The more setback you have will result in more bowlift. You may have a lot of weight in front that can be moved around.
  9. Thread: Boat set up

    by omcstratos
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    what prop do you have right now?

    what prop do you have right now?
  10. Thread: Prop talk

    by omcstratos
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    Lets say you are running a right hand rotation...

    Lets say you are running a right hand rotation prop (clockwise). Typically due to the water column, the blades when at the 6:00 will push water harder since the water pressure is greater on the...
  11. Thread: Prop talk

    by omcstratos
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    I'm not any kind of expert on this but I might...

    I'm not any kind of expert on this but I might can ease some confusion ( or make it worse, no promises ).

    As far as low rake lifting the stern and high rake lifting the bow, that is only partly...
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    As far as cutting the exhaust, all it will do is...

    As far as cutting the exhaust, all it will do is make more noise. No big performance gains, but in some cases you will run a little lean.
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    Weight, gear ratio, midsection length, exhaust...

    Weight, gear ratio, midsection length, exhaust hub diameter. Those are some of the main points.

    As far as modding your motor, what kind results are you looking for?
  14. I believe that it feeds to the housing. You can...

    I believe that it feeds to the housing. You can fill in the cavity below the water pump and let the two hoses feed the water pump. I think you leave the impeller there to regulate pressure, and...
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    Well it's not mine, haha. I'm just helping out a...

    Well it's not mine, haha. I'm just helping out a friend getting his in shape. As well as a 13' Allison for another. I'm tight on money right now and don't have anything fast to run.
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    I'm in the middle of a 13' panther right now. Do...

    I'm in the middle of a 13' panther right now. Do you have any pics of yours setup?
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    the decal colors look like mid 80s to me I...

    the decal colors look like mid 80s to me

    I believe these are the red band motors though
    56489
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    You have to pull the powerhead and modify the...

    You have to pull the powerhead and modify the tuner. Drilling the midsection is different. The easiest thing to do is buy a 50hp one.
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    I don't have an answer for you but I may be...

    I don't have an answer for you but I may be interested in your 25 carb if you don't need it.
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    You need to get the big bore 40 carbs, 50hp...

    You need to get the big bore 40 carbs, 50hp carbs, or 2 of the 75hp carbs. Also if you can find a 2cyl 60, they will work also. The 60hp had timing set at 20 or 21 degrees. I think my 50 specs says...
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    I might would guess port timing is different

    I might would guess port timing is different
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    Let their ethanol gas sit in the tanks and turn...

    Let their ethanol gas sit in the tanks and turn to that crap separation. Maybe they will eventually figure out how "great" it is.
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    I don't know if/how they will fit, but you will...

    I don't know if/how they will fit, but you will have to play around with jets with any kind of changes you make to get the most out of it.
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    As in the 60 was faster? Not dependable? Sorry,...

    As in the 60 was faster? Not dependable? Sorry, I'm not quite understanding what you mean.
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    He has come back before.... and I'm sure he will...

    He has come back before.... and I'm sure he will again.
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    The pickup will provide you with all the pressure...

    The pickup will provide you with all the pressure you need. And the impeller will actually regulate the amount of water. Kind of like a low pressure pump to a high pressure pump setup. Hope this...
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    With a transom pickup, the only extra step from...

    With a transom pickup, the only extra step from taking off the two bolts is to pop the water hose off from the fitting at the gearcase. It takes 1 extra minute. The rest stays attached to the boat.
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    And the transom pickup will provide plenty of...

    And the transom pickup will provide plenty of pressure. At speed, it actually forces water in if you have your pickup angled just right. (Transom side of the pickup flush with bottom of boat. Lower...
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    Half the time, I usually shift then start the...

    Half the time, I usually shift then start the motor up.
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    If you have to relocate your water pickup like...

    If you have to relocate your water pickup like that, I'd personally run a transom pickup instead and keep your stock gearcase. You are well below speeds to need a nose cone.
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    I'd check with Ron Hill. He supposedly is casting...

    I'd check with Ron Hill. He supposedly is casting them again. Maybe he will see this and chime in...
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    I think I win that one.

    I think I win that one.
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    Phil what don't you understand about outboard...

    Phil what don't you understand about outboard applications. Do you want to let off the throttle at full speed and have the boat to continue providing thrust for another 150 yards into the river bank...
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    You struck any oil down there yet phil?

    You struck any oil down there yet phil?
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    Phil... Lets go back to the drawing board with...

    Phil...

    Lets go back to the drawing board with a little simple physics lesson.

    Take a 3 foot diameter solid disc and a 3 foot diameter ring. Both have the same weight of each other. You put...
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    Wow Phil, a 2 year old is more mature than that.

    Wow Phil, a 2 year old is more mature than that.
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    Haha.... Convince Phil if you get a high pass...

    Haha.... Convince Phil if you get a high pass filter for your boat, you will pick up some on the top end.
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    You are talking about the momentum that the...

    You are talking about the momentum that the flywheel carries when you let off. I was thinking what you meant was you could get a random extra bit of energy when running like using NO2. Your...
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    PDT... knows everything about flywheels,...

    PDT...

    knows everything about flywheels, outboard oil, steel jack plates, but he doesn't know what kind of water pressure gauge he needs to get for his 60hp Johnson
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    I'm not getting what you mean about the...

    I'm not getting what you mean about the cavitation and the flywheel having stored energy and how a lightened flywheel doesn't have enough in it. ENOUGH OF WHAT IN IT??
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    You were on here a month ago and didn't...

    You were on here a month ago and didn't understand the torque vs. horsepower. You didn't understand how the torque curve falls while horsepower keeps pulling on up. But now you are an expert on...
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    And PDT, I'd like to hear your explanation about...

    And PDT, I'd like to hear your explanation about "stored energy" of a flywheel.
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    For once you agree with someone on here. Removing...

    For once you agree with someone on here. Removing a pound here and there adds up. But why would you want to put a heavy flywheel on the motor and weigh it back down? You may be an engineer, but I can...
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    "I don't think I am smarter than anyone, but when...

    "I don't think I am smarter than anyone, but when a complete fool try's shooting me down with rubbish I will obviously stand my ground"

    I'm kinda seeing a trend here Phil... You are the fool...
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    Looks like the 90 got outrun this time. ...

    Looks like the 90 got outrun this time.


    http://www.youtube.com/watch?v=FTd8bJZDWpU&list=UUjQkUitmspKT-57v59QN38A&feature=c4-overview

    Ok, I'm done with the videos now. Sorry about your thread...
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    That is because you know EVERYTHING, don't you?...

    That is because you know EVERYTHING, don't you?

    And just because the 90 has more factory rated HP than the 40 doesn't mean it is guarenteed to win the race. Does a Mack truck with 2000ftlbs of...
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    Since I've sourced a few videos I found on...

    Since I've sourced a few videos I found on youtube here is Mike... I think... It looks like he is running with 88workcar's green 14 allison with a 90 Yamaha.

    ...
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    Hey Phil, how ya like this one? ...

    Hey Phil, how ya like this one?


    http://www.youtube.com/watch?v=0JGyku_oYiY
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    This one to me sounds just fine idling along. ...

    This one to me sounds just fine idling along.

    http://www.youtube.com/watch?v=PmnLjbWHlP0

    This is not my video
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    I don't know what y'all are talking about. PDT...

    I don't know what y'all are talking about. PDT knows how to make his boat fast and would probably smoke anyone that tries to race him. His 13foot boat with a 60hp can go a whopping 38mph. Heres his...
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