I hate my Ms. Bud

[Icman69]

I purchased a Miss Bud 1/12 used so far I have replaced the Radio and Reciever prop and added the suggested mods short of the racing servo. My issue is with it running I have gone to the lake with it 5 times now and the most I can get out of it is maybe 3 laps at 1/2 throttle it boggs down and stalls. I assumed it was running way to rich I have adjusted a little at a time and have returned them to the factory settings. The darn thing just will not run, it has gotten to the point I want to set her ablaze and watch her sink. I just now got it to do laps prior to this it would die almost instantly as soon as I put it in the water.

Is this normal for Nitro? :mad:

[BoatDoc]

before you burn it...consider sending it my way!! when first running mine, it had less than stellar performance with the stock glow plug. an OS A-3 helped out a bit. from my experience with this boat i will say to check these things out: throttle pushrod (is the carb opening all the way?), fuel line (it has a nice kink when it exits the tank...kinks are bad!), and have you lubed the drive shaft? another thing, this engine tends to "load up" when run at low throttle. try not to idle it for too long, and if you have to idle it, make sure you give it some gas while it idles, or otherwise the carb will load and the engine will bog out and die. the break in is critical on that engine. if properly done, it will be a screamer, if not...well...you'll be dealing with trouble!

[bugfanatic]

Unfortunately yes, it can be an average experience with nitro. I love to run nitro, but I've been where you are right now. Like most anything, when it's bad it can be real bad, when it's going good though, it'll be great. It could be something as simple as the carb not being on tight to a bad glow plug. If you had an electric boat, you really only have to worry about whether or not your batteries are charged (ok, I made it sound simplistic, but you get the point). With nitro, there's a few extra things in the mix. Hopefully the guys here can pitch in & make you a happy boater. Check everything over, like make sure there is no crud in the needle of the carb, fresh nitro, proper lube in your nitro, tight carb, no kink in your fuel line, head is on tight, tight prop shaft, lubed running gear... etc. You can buy an engine break-in stand for about $15. It's not a bad idea to test your engine out of the boat - rig something up to make sure your engine is water cooled while you run it. It's hard to run it under a load, but maybe something will be obvious when you get the motor out. Hang in there, we'll help all we can.

[manuloco]

I have a Miss Bud also and I will tell you that since I have had this boat it has been nothing but trouble! :mad: I have already sent the motor back to horizon....working with this new one i have had mixed results....One day at the lake the boat seemed to finally be there, and then the very next day doing exactly the same thing as the day before I went out and no matter what the toss was like or how I played that little game where you let off on the throttle to that point right when it was about to cut out and then give it the juice ---- it still did not work...

I will however take it out tomorrow and see what she does....I will tell you that when she ran, she really ran and it was tons of fun.....action the whole time!

<Manu> :)

[BoatDoc]

i can't figure out where all this trouble with miss bud's is coming from! mine has been an absolute blast to run. but with anything that is mass produced... mine gets up on plane from a dead start without any fussing!! in fact, it got on plane with only one blade on the prop!!! maybe i got the prototype or something! but all i have to say, is when there is trouble with this boat, it is something simple. check for fuel flow, and i forgot to mention above, but you want to make sure that the set screw on the drive shaft is good and tight (a little blue lock tite won't hurt either). or it WILL come out!!!!!! i hope that you can get it figured out.

[bugfanatic]

I have the Miss Bud & have had fun running it - no problems yet. I never ran that plastic prop that came with it so I never had the cavitation problems that other people had.

[BoatDoc]

what's that prop that everyone's been putting on the buds? i smoked 4 of those plastic ones today!! i guess the porting and shortened pipe did the trick! of course that added torque has come with a price...i need to put some carbon fiber or glass around the motor mounts because i started putting cracks into the hull. and that wet exhaust i put in rocks too!

[abx131]

Hey boat doc did you cut the pipe or replaceit. If you cut it, how much did you take off. As far as porting goes. Do you just round out the path way of the exhaust chamber? I have a dremel tool, will that work?

[abx131]

Icman69, Try running it hooked to a hose on a work bench. That way you can tune it. I had the same problem last year with mine. I run 4 to 5 tanks thru it at various throttle settings and broke it in. Now it does not give me any trouble. Upgrade the glow plug. The ones I used were garbage. Now run OS 8 and a 20% fuel and it has been smooth sailing. Made an adapter from plumbing parts to hook to a faucet that reduces down to a tube to fit the cooling port on the head.

[BoatDoc]

to shorten the pipe, i just pushed it farther into the coupler and bent the mount a little bit. you need to put some zip ties on it to keep it from pushing back out though...the mount tried bending back i think! it did give it a little top end though. i'm thinking about cutting the header pipe a little and making a new mount for the pipe, as it will make it easier to adjust. there's no need to port the exhaust it's already as open as it can get. the only way to improve the header is to get a new one with better flow. as far as porting, i matched the cylinder to the crankcase to flow better and smoothed the ports, but as i'm no super-engine-expert, i'm not going to recommend it to anyone!!! why, you ask? because one wrong move with the dremel and the reliablity of the engine is gone, and the warranty too!

[Hydro Junkie]

One other thing I've seen done to break in a motor is to attach an airplane prop to it. For this to work, you need to use a prop big enough to really load the engine while it's on a test stand out of the boat. If you don't trust being around the engine with a HUGE prop spinning, mount the prop on a shaft to move the prop away from the engine. One of the worst things you can do is run an engine with no load, especially at anything above an idle for more than a few minutes. I made that mistake with a K&B 7.5 inboard years ago. I ended up with a ruined conrod and crankcase. I also didn't take the time to pull the motor out of the boat, so I ended up with a boat full of fuel. That wouldn't have been so bad, except the hull was a Dumas Atlas made with birch and mahogany plywood with no primer or sealer. Net result, replacing the bottom and rebuilding the engine :(

[raderrustler]

The dynamite 15 engine will increase power with a little massaging of the boost ports and cleaning up the bottom of the sleeve. I picked one up used and ported and polished the engine and the old owner said he never would have sold it if he knew it had that in it.

[BoatDoc]

i have to agree...i did a light port job on mine and increased power quite a bit. i can only imagine what a full port and polish could do. since my bud's down for repairs i may just try it.

[abx131]

Speaking of down for repairs. I went to run my miss bud and it went no where with the engine running full throttle. I thought I lost te set screw to the drive shaft. It turns out the pin in the dog gear came through the side wall of the brass fitting on the engine's shaft! The pin is gone and I'm dead in the water.

[BoatDoc]

i'd rather throw a drive pin than have a sudden gust put me into the rocks!! have you found a new pin yet?? i think the miss bud is a blast to drive and i hate seeing mine sit still with a torn up left side. if you haven't already...put some blue loc-tite on the set screws on the drive shaft. mine threw out the the set screw on the engine and i was lucky to keep the drive shaft in the boat. from now on i will loc-tite everything!

[abx131]

The set screw is still there I had to go through the whole boat last year because the vibration had loosened all the nuts and bolts. I used loc tite on everything. I lost the pin, it must have come out while starting it. As for the broken piece on the engine shaft, My father in law is a retired Boeing machinist and he said we can cut the brass collar off the shaft and use a slightly thicker and stronger collar so the pin wont grind its way through the side wall. He is really handy with stuff like that. The guy now builds fully functional scaled down steam engines that run on a 7 inch wide train track. He can build or fix anything.

[abx131]

undefinedundefinedThe set screw is still there I had to go through the whole boat last year because the vibration had loosened all the nuts and bolts. I used loc tite on everything. I lost the pin, it must have come out while starting it. As for the broken piece on the engine shaft, My father in law is a retired Boeing machinist and he said we can cut the brass collar off the shaft and use a slightly thicker and stronger collar so the pin wont grind its way through the side wall. He is really handy with stuff like that. The guy now builds fully functional scaled down steam engines that run on a 7 inch wide train track. He can build or fix anything.

[toyman64]

iceman69, your just running it to leen, open up the needle valve until it stops bogging down and make sure the plug is tight, but not too tight.

[a_short_round_1]

My miss bud had similar problems, I found the silicone sleeve between the header and the exhaust was split. New sleeve...runs great!

[toyman64]

cool! rite now it's to windy to run our miss buds rite now with all the leafs blow'in in the water so my neighbors and i are runn'in cars and trucks.

[Icman69]

Guys

I want to thank everyone for there help on this boat, Most of what you have suggested I have already tried, The plug has been changed several times, the carb has been adjusted rich and lean several times. since this thing just want to be a pain it is not going to get the best of me.

I am just going to let her sit for while and work on my Zenoah powered boat. By the way I saw a few comments about the Pin blowing out of the Shaft. If you should have to order a shaft from pro boat beware. I have recieved three so far and they have all been rusted to the stuffing tube. I finally just had Horizon credit my card and I gave up.