Savage 25 carb/engine connection

[kgilliland22]

Hi all, I am fairly new to the R/C world but was given a Savage 25 by a co-worker a couple of years ago with a suspension problem. I fixed that issue and drove it quite a bit. It ran really well and was a lot of fun. Last year I took the carb off to clean it out and once I put it all back together, I have never been able to keep the carb tight where it mounts to the engine.

I tighten the set screw down as tight as I can but after running it for a couple minutes, the carb will come loose, and the motor will get very hot to where the fuel almost seems to be boiling. I am guessing that is from running lean when the carb comes loose and extra air is added.

Has anyone seen this happen or have any tips? I would like to get this truck going again as my kids are getting old enough to really enjoy it. I am not opposed to putting a new motor on it if there was a simple, direct replacement for it as I know this one has a lot of hours on it. Thanks in advance.

 

[polarman]

Some RTV (gasket sealant) should help seal it up, but it seems odd that it loosens up like that. Perhaps a dab of blue thread lock could do the trick.

 

[Jam Racing 1]

is it possible the isolator has lost its grip on the carb base, a bit of epoxy will keep it in place if it has, take it off the carb bottom clean well and use a bit of epoxy inside it to keep it in place....

 

[kgilliland22]

Thanks for the reply! I did try sealant and it helped it run a little longer, but eventually it would loosen up and break the sealant. Looking at a schematic for the motor, it looks like there are a couple of wedges that the screw goes into that holds the carb in place. Could those possibly cause an issue?

 

[Jam Racing 1]

pics of things will help alot

 

[kgilliland22]

I don't have any pics right now but can get them later. Here is a schematic of the the motor that is on it.
http://bonetracker.dk/rc/div/piccoP3-monster.JPG Part number 5037 is the only thing I can see that holds the carb in place.

 

[kgilliland22]

From looking at things more, it looks like the insulator sleeve has came loose as JamRacing1 mentioned earlier. Is there a good replacement carb that has a metal body? Sounds like this is a known issue with this particular carb. Would something like the mach 2 .26 work?

 

[Jam Racing 1]

From looking at things more, it looks like the insulator sleeve has came loose as JamRacing1 mentioned earlier. Is there a good replacement carb that has a metal body? Sounds like this is a known issue with this particular carb. Would something like the mach 2 .26 work?

That isolator is there to keep engine heat away from the carburetor, just do as I said above and epoxy the insulator back on the carb base and it will be FIXED ...

 

[kgilliland22]

That isolator is there to keep engine heat away from the carburetor, just do as I said above and epoxy the insulator back on the carb base and it will be FIXED ...

What kind of epoxy would you use?

 

[Jam Racing 1]

JB Weld, or any decent epoxy outta work fine, just make sure not to get it all over anything but the isolator and wipe it clean then let dry......