new project motor 2 cycle

[ironman]

they are from an utlralite plane but still cannot find the ones i have

 

[ironman]

on a 2 cycle motor what would be the correct gas oil mixure you would use my sons pocket rocket uses 25/1 what would any of you all suggest this would be.

 

[Jerryburger]

25/1 is what it says for my Sach's motor, too. Russ might know.

 

[Kenny_McCormic]

A little too much never hurt anybody, 25/1should be fine.

 

[ironman]

Ok need help on this carb cannot figure out how it works there is no fuel going threw it.But i did have a good day was able to pour in some gas in the carb and motor started right up with no problem sound great.Here is a video clip any info would be nice that you guys might have?just dont understand with the carb mounted side ways like it is.

 

[Jerryburger]

WOW! Ironman, that is a thing of beauty! You're right, that's a different carb, huh? A word of caution (maybe Russ can back me up) That motor is meant to have a BUTTLOAD of air blowing over it- either by airplane prop, or a fan/shroud combo like a snowmobile engine. If you do get it fired up- don't run it too long until you're sure. There are snowmobile engines that run without fans (FreeAir) but if you notice, they have humongous fins all over them, and probably wouldn't do well unless the sled is moving. Again, SCOOOOOOOORRRRRRRE!

 

[Jerryburger]

...oh... and your teststand is much more sophisticated than mine! (MilkCrate, oil bottle!)

 

[ironman]

so you thing its going to need a fan of some type and still having no luck finding info on it.

 

[I like karts]

Actually, I think it should do fine without a fan.

If you really think you need one like if it gets really hot, you could just put a big air scoop on the side facing forward on your kart.

As for the carb, is it a float carb or diaphragm? I could help you more if I knew what kind it is. It kind of looks like a float to me, but I'm not sure.

If you want to avoid all the hassle of getting that carb to work though, you could get a 30-something mm Mikuni

 

[gocartkid]

I agree...a scoop would look cool!

 

[Kenny_McCormic]

Thats a diaphragm carb, gas isnt gonna come out unless the engine is running and the carb gets a vacuum pulse, I would have to gut the the thing myself to figure out the hookups.

 

[I like karts]

^ Oh.


In that case the reason gas isn't coming out is because you need a pulse line hooked up to the crankcase and the engine has to be running.

I'll let russ explain the pulse line in more detail :arf:

 

[ironman]

Ok took carbs. all way apart i understand some now how. When you say pulse line im lost i know when i cover the intake with my hand it will start but can not keep running.so i see when the engine is running it suck the gas up threw the bowl but what type of filter are what would be the correct way to cover up the intake to get it to work right.i now know that these motors were used in the early 70's but find no info on them being use on urtlalite planes only a few times i see info on snowmibiles.motor sounding great when running

 

[kibble]

When you say pulse line im lost i know when i cover the intake with my hand it will start but can not keep running.

The pulse line is the one that you get when the engine creates a vacuum in the crankcase when the piston goes up, well you have to tap into the crankcase to get a line that does this.

Uh, I think that makes sense.

 

[Kenny_McCormic]

Hook the two unused hose barbs to some short hoses and stick them in the intake, hold your hand over it and try to start it. no need to tap the case, once you get the hookups figured you can just tap the intake manifold.

 

[ironman]

it has two already on there one is hook up to the back side of the carb and the other is plug off. all three motors are the same way.

there is one on the left and right side of the stamp if that is what you are talking about.

 

[Kenny_McCormic]

See the hose coming out of the case near the info plate? That should be hooked to the carb, your probably leaning out without a filter.

 

[ironman]

yes that one is hook up to the back side of the carb i wounder if this motor needs to be offset to about the 1 or 2 o'clock position that way the fuel would flow back in the intake.

 

[Kenny_McCormic]

If the engine is any good it will suck it in. With that carb, as long as it gets fuel it will run upside down no problem.

 

[I like karts]

Thats a good carb too

woot Mikuni