Keeping miss bud running

[gunnar0518]

I'm not having much luck with my Miss Bud. When she runs she runs great but it's only for a short time then she stalls. what to do?????

[bugfanatic]

Check for a kink in the fuel line at the fuel tank outlet (common). If that's not kinked it could be a loose carb (also common). If it's neither of those than I'm thinking needle settings. You say for a short time, how long exactly? I wonder if it's fuel starvation - sounds lean but I'm just guessing from what you wrote.

[decoy706]

At least your started-mine is now a window dressing as myself my LHS and 3 different race buddies all have tried to get it to run without any luck. Oh well I had planned to convert it to electric anyway........ :mad:

[bugfanatic]

There were a couple other people who had motor problems. Do a search in the forums here - Proboat replaced the motors. Mine ran great. Really. Within several pulls it was off & running. I never had the problems others seemed to have. Call it good luck for me I guess.

[gunnar0518]

bugfanatic,

If I was to guess i would say it runs about 3 min. then dies. When it's running full throtle it halls azz but when you slow down for a turn it bogs down then dies. I really like the boat and love the hobby but its really getting me down. I would also like to build a boat maybe a tunnel hull does anyone know one that is really fast???

Thanks to all that replied. I will be very thankful for any help i can get.

[Doubledog]

I hate to say it, but with gas, you don't have near the problems as the nitro engines do.

Hope your problems solve soon. :)

[DLM]

www.rc-store.com has an article on the BUD and is a back issue. Get hold of this site and get an issue, it is first-hand~~~

[DLM]

ok, here it is back issue is Radio Control Boat modeler --December 2003 -- page 40-- 1/8 scale-- rest my case!

[bugfanatic]

If you're running at full throttle for 3 minutes, but then it dies, have you been running at full throttle the whole 3 minutes? Is your tank full? the reason I ask this is because if my tank gets low, the boat will die because as the fuel sloshes in the tank, it will gulp air into the fuel line. When it's out of the water, how's the throttle response? Is it sluggish or quick?

[DLM]

Is there a possibility of a bigger tank? You say gulps air which means air leakage into gas tank where there should be a vaccuum only; leakage will lean out mixture especially if you are running rich!!

[Micho523]

Isn't there a pressure line hooked up to your gas tank? If so its not "air" that your engine is gulping, its exhaust. DLM, a vacuum would be a BAD thing because you want positive pressure to push the fuel through the line and into the carb. You want the tank sealed so that the pressure from the exhaust's pressure line won't escape and defeat its purpose.

[DLM]

Now were getting somewhere! The leaky exhaust cooling jacket area. Keep an eye for thw replacement exhaust couplers inside the miss Bud box. The Good couplers have a much higher heat tolerance and are distinguished by their milky gray color, the old ones are brownish.

[DLM]

I hope were talking same power. mine isZenoah g23m watercooled 23cc gas engine rated at 1.8hp

[bugfanatic]

No, DLM this is the little nitro motor. The exhaust has no pressure feed to the tank & the lid may/may not seal all that great. When the fuel sloshes, it just gulps regular air. You know, I just assumed this was the 1/12 Miss Bud. Oops!! I guess we need some clarity here.

[gunnar0518]

I'm sorry I should have made myself clear. It's a 1/12 nitro Miss Budweiser.
As for the fuel I still have about 3/4 of a tank. The boat seems to run fine out of the water. I can run a full tank through it out of the water with no problems, great throtle responce. The problem is when it's in the water.

[DLM]

I read somewhere today that too much advance is like leaning out the carb and no power when put under load, could this be possible. Try richening the mixture just enough till you find that sweet spot. First try less advance, till you get the feel of what your boat is telling you. Use small incruments of measure of change in settings, be it bad or good.

[TXTRCR]

when you place the boat in the water it loads the motor, and since the prop is directly driven to the crank shaft this only makes it worse. i run 1/8th scale buggies and just a tap on the flywheel when the buggy bottoms out on a flat landing will kill the engine same thing is happening here. if it was running fine before, and you were able to get a full tank of fuel through the engine before it died, the problem is probably pretty simple to fix and will not require adjustment of the carbirator. check your radio settings is it possible that the throttle trim got bumped when putting the boat away after a run. you have to keep the rpms up on a boat motor to counter the drag of the prop on the crankshaft. this is why you toss a nitro boat to launch it simply setting the boat in the water will load the crankshaft too much too quickly and the engine will stall if the rpms are not high enough or the low end is set too rich the engine will dround in fuel. tossing the boat loads the crankshaft slowly and lets the rpms build up before the prop is completely in the water and the motor can overcome the drag of the prop and will power up on plane normally. if your boat is new and this is happening during the breakin process or the first couple of runs after a bench breakin proccedure, then it is most likely the idle stop screw set too far out and its allowing the throttle to close completely sarving the engine for air. turn the idle screw in just a small amount and retest. if that doesnt help the stalling try leaning the bottom end just 1/16th of a turn clockwise or tightening the screw, the screw is located on the end of the carb either the throttle lever end or the opposite the idle stop screw should be a small flat head screw with a spring on it either on the front side of the carb or between the cooling head and the carb. let me know what you find out and ill try and help you get it going. i hate to see rc cars and boats go to waste on shelves.

[bugfanatic]

TXTRCR may be right. But, I'm leaning toward your engine being on the lean side. Only reason being is that you say you have good throttle response. A lean engine will have great throttle response but will shut down shortly if it starves itself. I may be wrong but I would try unscrewing the main needle about 1/4 turn & then trying again. Also, the Miss Bud's radio will glitch if the servos or switch get wet, I've had that happen too. Once the servos got wet it glitched enough that it shut the motor down.

[DLM]

I read some more out of RCBM mag. where if it dies while running, to lean if it chokes out right away to rich. What Texas said on the choke is correct. Ok, take a buddy with you with rain gear! Reset mixture screws and have buddy hold the boat and fire up, see what cooks. Not right reset screws and and do again.

[DLM]

Servos, unscrew bottom of servo enough to use hair dryer and then use Corrosion-x, Trend, Stuph all the same which deter the moisture. Spray a dab , let set a couple of minutes and then uae hair dryer and then let set at an angle to get most of the x out and reinstall. Climate Models has it, X ,.

[TXTRCR]

Oh thats right i forgot most of the nitro boaters run the idle stop screw low enough to kill the engine when you apply the brakes. its easier than taking the hatch off and squeezing the fuel line to shut the engine down. takes practice to make a turn or slow the boat down for docking i guess. I would actually have to run the boat myself to see whats going on, before i could be of any help to ya. basically im just taking what i know from running cars and trucks for years and applying it to boats along with knowledge that i picked up in the forums here.

[DLM]

TXTRCR; from what i have read of your info, take a bow. I too am not a nitro, just what i have learned from older cars and i have electric boats in the 22" range that can do 32 mph easy with Neo 05's motors and now a airplane motor which on 10 cells can turn 50,000 rpm. I won't run that high rpm but will run 7 cells and will do 34 or so in the new boat. I water cool the hoods and esc and use fan also for the hoods. The positive post generally get the warmest, so the cooling water goes there first. My 05 motors of which i have many are older cars motors ( 85-87 Trinity Champions ). The Revolutions, Ballistic, Hughey handwounds, same as TI's. I have a Chameleon #2110 and i hear the Reedy 19t Spec with a 9mm comm is no slouch. I bought a machine wound monster pro and was not impressed at all. The Revolution motors impressed me more. Enough out of me.