My neighbor knows that my son and I race (Slashes) and bash around in the back yard (Stampedes) with RC cars. We live on a lake and he has stated several times that he should get his Traxxas boat down out of the attic and give it to us to see if we can bring it back to life. Well he did just that last weekend and brought it over to us. So now the troubleshooting begins!
I am not new to RC cars but am new to NITRO powered RC Vehicles - they always seems like more of a hassle than electric. I do have significant experience building and racing dirt bikes, sport bikes, offshore power boats - so this shouldn't be too challenging since the NITRO motor is essentially just a two stroke motor that runs Nitro, right!
The boat is complete and stock. After some initial assessment, it was discovered that the boat has the following issues...
- Carb slide stuck
- Throttle Servo bad
- Piston stuck in cylinder
- Crack in deck at right rear
- Varnish in gas tank
- Rubber bellows that go through transom for steering dry rotted
I was able to unstick the carb slide by spraying it with carb cleaner and it now moves with ease.
I checked the throttle servo by hooking it to the receiver in one of the Slashes - it doesn't move. It has some brown sticky stuff on the bottom and when I removed the screws for the case, the gears on top still have grease on them but the circuit board on bottom is corroded. I will need to get a replacement for this and I am surprised they didn't use a waterproof servo.
I was able to free the piston but only after removing the engine (with the mount and RTS system in it's entirety) from the boat. I soaked it with cleaner and then WD 40 and finally Marvel Mystery Oil. I think it was just gummed up like the carb slide was. It will now move up and down freely if I put a socket on the starter shaft. No grinding. scraping or wierd noises or anything.
Need to fix it...low priority right now until I get the engine running.
GAS TANK VARNISH
Need to clean it - what should I use?
CRACKED STEERING BELLOWS
Need replacing - I assume this is a Traxxas part that is still readily available - no worries now, I need to get it running first.
- On the carb, is there any thing else I need to worry about cleaning/unclogging. Typically on motorcycles that have sat for a while, I have to disassemble the carb and clean the pilot jet, main jet and the associated holes in the carb. This carb is so small, not sure what needs to be cleared. I have not removed the carb from the engine at this point - it is necesary?
- On the gas tank, what is the best cleaner to remove the sludge in the tank?
- On the engine, should I be concerned about the cleaner/oil that I used to free the piston? I don't want to try to fire this thing if you guys think there will be an issue with the residue...
- How would you recommend that the crack be repaired. There is no way to get to it from the backside, so it would be a surface only repair. Should I dremel the groove wider and epoxy it or just use some CA (tire glue) in the crack to bond it together?
If we can get it running, I would like to replace the servos with waterproof ones (Traxxas 2075) and replace the AM radio with a 2.4 ghz one that I have laying around along with a Stampede waterproof reciever box that I have in my spares, that should solve the waterproof electrics issue. I would also like to put a rechargeable battery in place of the AA batteries for the electronics - is there an adapter for this?