pipisugbo
RCTalk Racer
Well, not exactly. Yesterday, I took the Maxx out to the street to do a few high speed runs and get the tune dialed in. I had quite a bit of blue smoke coming out at WOT, so I brought it back and leaned it out 1/8th turn. Took off for another run up and down the street, and when I brought it back to lean it out just a hair more(still a lot of blue smoke...it had gotten quite a bit hotter out since the last time I ran it), it kind of sputtered a little bit...didn't sound quite right. So I feathered the throttle just a hair, and it completely conked out on me. I thought maybe it had flooded, so I pinched the fuel line, tried to bump it over with the EZ-Start and nothing...I mean NOTHING.
It clicked once, the light on the starter went out, and that was it. I decided to let it cool, take the motor out and check the OWB. That looked great. So, a tear down was in order, and this is what I found.
Notice the con-rod. That doesn't seem normal to me.
I'm not really sure what happened here. Does it look like excessive discoloration on the sleeve and piston? I definitely don't have tuning down to a science on this 3.3(I don't think many people do...). I've always tried to run rich, but not excessively so. It doesn't look like it has overheated to me. There is no discoloration on the gasket, and the inside of the sleeve is totally smooth and about 99% consistent on coloration.
Obviously its time for a rebuild or replacement...I think I'm going to take the latter option, and end up with a O.S. .21TM. I had an O.S. .12 when I was a kid, and that thing was so easy to tune. It fired up first time, every time and held that tune like a dream. My other option is the Picco .26, but even though its less expensive, I'd end up spending more than the difference in price on broken drive-line components, haha.
More than anything, this post was just to share a little carnage...I know how everyone loves pictures.
Oh, and just one more little bit of info - the piston still slides up the sleeve quite smoothly, and has good pinch at the top. I don't think it was a seized piston that caused the con-rod to snap like that.
Any idea whether or not Traxxas would help out in this case? I'm not really concerned either way, but if they would, I'm not going to turn it down, thats for sure.
It clicked once, the light on the starter went out, and that was it. I decided to let it cool, take the motor out and check the OWB. That looked great. So, a tear down was in order, and this is what I found.
Notice the con-rod. That doesn't seem normal to me.
I'm not really sure what happened here. Does it look like excessive discoloration on the sleeve and piston? I definitely don't have tuning down to a science on this 3.3(I don't think many people do...). I've always tried to run rich, but not excessively so. It doesn't look like it has overheated to me. There is no discoloration on the gasket, and the inside of the sleeve is totally smooth and about 99% consistent on coloration.Obviously its time for a rebuild or replacement...I think I'm going to take the latter option, and end up with a O.S. .21TM. I had an O.S. .12 when I was a kid, and that thing was so easy to tune. It fired up first time, every time and held that tune like a dream. My other option is the Picco .26, but even though its less expensive, I'd end up spending more than the difference in price on broken drive-line components, haha.
More than anything, this post was just to share a little carnage...I know how everyone loves pictures.
Oh, and just one more little bit of info - the piston still slides up the sleeve quite smoothly, and has good pinch at the top. I don't think it was a seized piston that caused the con-rod to snap like that.
Any idea whether or not Traxxas would help out in this case? I'm not really concerned either way, but if they would, I'm not going to turn it down, thats for sure.
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