SRT TONY

my revo 3.3 will start but only when the big black screw is all the way closed(leaned). but when it does turnover and advenually start, i turn the screw back to factory settings. what could be the problem? it wont start at factory specs therefore i turn it to lean. and when it starts it over heats within 3 mins of use. and it wont let me do full throttle runs. much help needed. thanks

gettnbetter

Be sure to prime the engine properly first, there should in the lines right up to the carb before you try to start the engine. Start with the needles at stock settings. Make sure there are no air leaks in the system. Including leaks at the exhaust header, pipe coupler, the silicone hoses and the fuel tank lid seal. Make sure the carb is tight too. Check the glow plug too, it may be loose.

You really need to wait till the engine is up to temp before making needle changes. If it's overheating, it's likely got a leak somewhere or is just set way too lean.

SRT TONY

thanks, but 2 days ago i took out the engine apart and found out that the piston was chiped and the bearing inside that holds the crankshaft was broken as well there for cracking the piston...

gettnbetter

wow! Poof... If that was a new engine, Traxxas will replace it for free. They replaced one of mine for free when the rod snapped.

jatoracing33

And if it is not a new engine, you can send it in via their engine replacement plan. Or upgrade. Whatever floats your boat. When you were starting it, did you give it a little bit of gas? Hitting the throttle a few times works pretty good.

SRT TONY

its gotta be 2 years old.. i guess its worth a try... wont hurt.. save me 70 bucks tho

jatoracing33

How many gallons have you run through it?

SRT TONY

About a good gallon, to a gallon and a quarter......what's good gas to use? I used to run trinity. Monster 25% then I ran out and the hobbyship didn't stock it there for I had to get top fuel 20%.

jatoracing33

That shouldn't be a problem then. All I can think of is you leaned it too much and it overheated. Either that or it was defective.

SRT TONY

Well I just called them and they told me they don't carry warrenties. But they will exchange it for the motor I have now for a brand new one for $115. Worth it?

jatoracing33

It'd save you $15. A new one from [link=http://www.towerhobbies.com]www.towerhobbies.com[/link] is $130. Personally though, I would just buy a new one off of eBay and save the old one for parts. Here's one for about the same price as Traxxas gave you: [link=http://cgi.ebay.com/Brand-New-Traxxas-TRX-3-3-Racing-Engine-Revo-Jato-/350369256692?cmd=ViewItem&pt=Radio_Control_Parts_Accessories&hash=item5193a294f4]link[/link]

Snook Man

The linked engine has no air filter/OWB or pull start.
Add in the shipping and missing items and its more than the ERP.

jatoracing33

Take those off the old one. And plus shipping its like $2.50 more That will leave you with an extra cooling head, crankcase, carb, and a few smaller things.