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Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

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Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

Old 02-09-2006, 10:27 PM
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RcCarFreak
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Default Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

On outboard motors, if the throttle cable is a certain length, wont it speed up or slow down depending on which way u turn, wont turning one way open that carb more, then close it more if it turns the other way? because the servo doesnt sway or move with the outboard motor??

or can the boat be set so that the servo moves with the engine and there is no throttle problems. if the servo does not move, but the engine does, wont the throttle cable length change when you turn, therefore affecting throttle? or is there a was to solve this, im completely confused!! please help!!!


Old 02-09-2006, 10:41 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

Anyone? please help..



tony
Old 02-10-2006, 03:02 AM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

Tony,

Give us a chance to see the question first.. Here's the process for setting up a throttle on an outboard. A sheath/cable is used for this requirement over a solid rod. When setting this up, allow about 1" - 2" of slack. This will allow the throttle to be moved with the motor when turning and not effect throttle settings.

Hope this helps:

Old 02-10-2006, 06:08 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

Hey thanks alot mark, that answers my question perfectly. i appreciate your help.
but one more question.... do you run filters on outboard engines to prevent water from getting in, is there another method, or does water just not get in???


thanks alot,

tony
Old 02-10-2006, 06:27 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

Tony,

No one that I know of puts a filter on for boats. Filters are used to keep dirt out. Water would still get thru any filter out there, even oiled versions.
Old 02-10-2006, 09:04 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

so what can u do, just hope that water stay's out, and if it doesnt, ur engine is destroyed?
Old 02-10-2006, 09:38 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

Destroyed? not a chance. I've yet to see any motor do a hydrolock and break things. I've dunked a few motors in my 20+ years of running boats. If you motor does get water in it, take the plug out and turn the motor over. Put a cloth rag over the plug hole while using the starter to turn the motor. Put the plug back in and start running again. At the end of the day, spray WD-40 in while turning the motor over. Then put a drop or two of afterrun oil in and turn over again.
Old 02-10-2006, 09:49 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

ORIGINAL: ob nut

Destroyed? not a chance. I've yet to see any motor do a hydrolock and break things.
One of the advantages of nitro engines! I had to send my Zenoah in to be rebuilt due to hydrolock.
Old 02-10-2006, 09:51 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

Tony, as OB NUT stated with the image, the slack is very important as well as anchored at the engine to keep it from changing throttle when turning. Just in case there was the question of the servo side later, also anchor it at the servo end. Which will be held fast anyway due to coming out of a water tight compartment!!

Mark, That is probably the nicest 3.5 setup I have ever scene
Jeff
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Old 02-10-2006, 09:55 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

thanks guys.
Old 02-10-2006, 10:42 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

ORIGINAL: jw637362
Mark, That is probably the nicest 3.5 setup I have ever scene
Jeff

Thanks Jeff.. One other item I try to do and Jeff's pics reminded me. What ever side your throttle comes out of the radio box, use the opposite side to the carb. This gives even a bit more slack in the cable. Nothing against your setup Jeff [8D]

Old 02-10-2006, 10:46 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

ok, and as far as the rooster tail that the boat leaves behind.... the smaller the rooster tail the better right???

i had a miss bud hydro, but got bored because it was 2 slow.... so i decided to customize my own.
Old 02-10-2006, 10:53 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!


ORIGINAL: piper_chuck

ORIGINAL: ob nut

Destroyed? not a chance. I've yet to see any motor do a hydrolock and break things.
One of the advantages of nitro engines! I had to send my Zenoah in to be rebuilt due to hydrolock.
First I've heard of one doing that.. I'm going to have to remember this.. Should have a gas outboard before the end of the year.
Old 02-10-2006, 10:56 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!


ORIGINAL: RcCarFreak

ok, and as far as the rooster tail that the boat leaves behind.... the smaller the rooster tail the better right???
The cavitation plate on outboards stop the rooster tails from going tall. I just test props, height / angle settings to get the best performance from my boats.
Old 02-10-2006, 11:20 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

You just opened up a new cup of worms with the rooster tail.

It depends on prop size, efficiency and horsepower of the engine.

Not forgetting the angle off attack made by the prop in regards to the hull and the hull type.

I can't say that I have ever thought about it, perhaps do a survey? Big Rooster tail, little rooster tail, "What's fastest". Will help you find an answer.

I'm sure someone is keeping statistics somewhere as to wether the faster boats in a chosen class have larger or smaller rooster tails.

Hope this helps you, Brettos.
Old 02-10-2006, 11:31 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

ORIGINAL: ob nut


ORIGINAL: piper_chuck

ORIGINAL: ob nut

Destroyed? not a chance. I've yet to see any motor do a hydrolock and break things.
One of the advantages of nitro engines! I had to send my Zenoah in to be rebuilt due to hydrolock.
First I've heard of one doing that.. I'm going to have to remember this.. Should have a gas outboard before the end of the year.
It was a first for me too. My mono spun out in a turn, took on water, and when I tried going again, the engine died. When I got it back to shore I found it had actually pulled one of the cylinder bolts right out. I sent it to Toxic Marine and he ended up replacing the cylinder, piston, crank and a few other parts. He was nice enough to do his full mods on it at the same time. It's going in my Whiplash as soon as I get done prepping and painting it.
Old 02-11-2006, 12:07 AM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!


ORIGINAL: brettos01

You just opened up a new cup of worms with the rooster tail.

It depends on prop size, efficiency and horsepower of the engine.
As this thread was on outboards, I only factored in this type of motor. I'm currently running a 3.5, 7.5, 11 and 13 outboards. None really put up any large roostertail. As my 3.5 is a MAC motor, it has plenty of horsepower. See vid:

[link=http://www.rcflix.com/photopost/data/506/612Queen_City_Race_Heat_5_2.mpg]Mac 21 Racing[/link]

What I find really really cool is the wall of water coming off the turn fin of a hydro during a turn. Especially twins That is something to see..
Old 02-13-2006, 07:27 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

mark, rb innovations makes a super charger for the 1/12th scale miss bud hydroplane.. not necessarily the same one, but would i be able to drop a supercharger on the thunder tiger .21 (3.5cc) outboard i just got?? and it has a built in exhaust, would i be able to cut that so that i can put a custom pipe?



thanks, tony
Old 02-16-2006, 07:10 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

Tony, I wouldn't suggest a supercharger for any motor. On another chat site, that was discussed up and down. All the big names in racing came to the same thought, if it was that helpful, you would see them on the race motors. Just hype to get the masses to buy into the gadgets. As for putting a pipe on a TT motor, it has been done. Just need to find a header for the motor. Off hand, I do have a contact that uses TT motors to race with. He could help locate one for you.
Old 02-16-2006, 07:40 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

ok, i misunderstood your pm, but i included my e-mail.. i thought u where saying that he was someone that i could race... my mistake.

but i would have to cut the engine right?
Old 02-16-2006, 09:15 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!


ORIGINAL: RcCarFreak

ok, i misunderstood your pm, but i included my e-mail.. i thought u where saying that he was someone that i could race... my mistake.

but i would have to cut the engine right?
It would be tough to race together, he lives in Oregon. You would have to cut the lower unit out some to allow the header/pipe to fit in.
Old 02-17-2006, 05:47 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

but cutting it will not affect performance what so ever right? and it would even make it lighter...?


thanks..
Old 02-20-2006, 11:46 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

Going from the stock exhuast to a pipe will increase power and performance. Weight savings won't be that much of a factor. It is aluminum that is being removed, it doesn't weight that much to begin with. Also, you will be adding the weight of the pipe/header on. Unless you go with a carbon pipe, you will most likely end up close to where you started at.
Old 02-21-2006, 05:31 PM
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Default RE: Please help, NEED INFO ON OUTBOARD ENGINES!!!!!

i already cut the stock exhaust, im no pro, but it came out very well. all i need now is the pipe because i have the header. and i am going with a carbon fiber pipe. thanks for your help mark.

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