Still running hot! and so am I!

[godale03]

Hey Guys,

This damn break in is really starting to steam me! I am still running hot and I have not even gotten to half throttle yet! My temps are still running about 240. I have leaned the bottom about 2 hours and I am still running hot. I haven't touched the top end much, I mean I am not even getting there yet. Any ideas? I am getting smoke, and even a bit of spit from the pipe. I am clueless here guys. Is it possible I still need to fatten the bottom end? Thanks

Tom

 

[Plaidfish]

Richen the bottom end not lean it.....if you aren't going to 3/4 throttle and higher yet you're LSN is going to affect the the temps (via the fuel / oil supply) a lot more than you think...

 

[godale03]

Sorry Plaid,

I meant richen it.... I have not leaned the low end at all sorry about the typo. I have not gotten to 3/4 throttle yet. Man this is really starting to get difficult.

Tom

 

[SMaxxin]

Since your getting good smoke and the pipe is spitting fuel I would think it's an air leak.

 

[Plaidfish]

When it's Idling does it rev up and down?
does it seem to load up real fast?
Can you pinch the fuel intake to the carb and it starts to rev up about 4-5 seconds and shut down a few seconds after that?

When all else fails return it to factory settings and retune from there...you're pretty much done with the initial breakin after 8 tanks or so....then it's more of a getting used to your driving style and seating the piston / sleeve a lil more fo rthe rest of your first gallon.....

 

[godale03]

You know I thought the same thing. I checked around the carb and made sure it was tight, and then I took the pipe off and made sure the gaskets were seated properly. I did notice a little melting of the gasket on the part that actually sits inside the maifold on both sides. Is this normal? There were even a bit of black charing around the edge as well. Thanks

Tom

When it's Idling does it rev up and down?
does it seem to load up real fast?
Can you pinch the fuel intake to the carb and it starts to rev up about 4-5 seconds and shut down a few seconds after that?

When all else fails return it to factory settings and retune from there...you're pretty much done with the initial breakin after 8 tanks or so....then it's more of a getting used to your driving style and seating the piston / sleeve a lil more fo rthe rest of your first gallon.....

So even though I have not made it to 3/4 or even full throttle I have still gotten the mill broken in? I guess it makes sense.... I mean all you are concerned with at break in is getting the temps up. It takes about 10 seconds to idle down after I let off the throttle and it does seem to load up pretty quick. In fact in order to keep it from stalling I have to gun the throttle a bit. If I ease into it, it cuts out. Thanks guys.

Tom

 

[Plaidfish]

I'd reseal the carb and backplate w/ race seal or copper RTV....when it idles do the RPMs go up and down a lil while it's just sitting?? that's usually a good indication of an airleak......
10 seconds is lil high to settle down...might have an airleak....

 

[godale03]

I'd reseal the carb and backplate w/ race seal or copper RTV....when it idles do the RPMs go up and down a lil while it's just sitting?? that's usually a good indication of an airleak......
10 seconds is lil high to settle down...might have an airleak....

It is idling high for about 10 seconds and then it just drops down to normal. It does not fluctuate at all. When I inspected the manifold where it meets the back plate, I did notice the gasket was not seated real well and in fact I did notice a bit of nitro that looked like it had leaked from there. I resealed everything last night and have not tried to fire it since. I am hoping tonight I will get that chance. Do you think that could have been at least part of the problem?

Tom

 

[Got Nitro?]

well having a air leak from your engine to your manifold on a 2 stroke motor mean's your loosing a bit of pressure and could be that your engine is just acting goofy,if it was a 4 stroke,it might be a little differnt but your loosing pressure going to the pipe,wich mean's less pressure in the pipe,less power,tunning problems. That should help a bit maybe,but somebody please correct me if I'm wrong.

 

[godale03]

I have heard of air leaks causing some pretty funky stuff, but could it be causing my rise in temp? Possibly the loss in pressure makes it easier for the piston to move up and down, thus increasing RPM's, thus creating the hot temps? I don't know, at this point I am grasping at straws. Thanks guys.

Tom

 

[Got Nitro?]

That could be causing the temp problems,also would help if we knew what engine your running cause i dunno what engine were talking about,I'm pretty sure that having a really serious leak on the header could screw up your piston/sleeve,i remeber my uncle explaining to me that running your engine with a severe leak in your pipe or mannifold could burn the piston on two strokes,that could also happen if you had little pressure through your pipe,just make sure everything is tight,leak's suck. For your temps,if sealing it doesn't fix it,then... put a bigger cooling head on it?? i mean your running outta things to do.

 

[godale03]

The mill I am running is the OS .30. At this point I don't think I have a leak, at least around the head, and carb areas. I believe the the leak could have been around the exhaust manifold, which is good and sealed now. I think I will go after some sealant and seal the carb and back plate... just for good measure. I am not even sure an air leak could cause this problem yet. I love this hobby, makes you think! LOL

Tom

 

[Got Nitro?]

well go seal that bad boy and let us know man.

 

[godale03]

I wish I could man.... I do not have any sealant as of yet, and I am still stuck at work on this beautiful day. It is almost 75 degrees out!

Tom

 

[Plaidfish]

an air leak will cause heat up...it's like running it too lean since it can pull air from another source......so you'd need to run it really rich on top and a lil leaner on the bottom to compensate...I've done that in a pinch...I just wanted to play some more so I fattened it up ALOT and just don't let it sit still too long....LOL....but that IS bad for the mill.....I just didn't care to end my day just then.....

 

[Got Nitro?]

There's a great idea fishy,give him tips on how to get around it,,,i smell, REBUILD if he does that.

 

[godale03]

Well I am going to try and run it some tonight to see if reseating the pipe and manafold did anything to help the lean situation. If anyone has any other ideas let me know. Thanks guys and I will keep you posted.

Tom

 

[Plaidfish]

There's a great idea fishy,give him tips on how to get around it,,,i smell, REBUILD if he does that.

Well I did say that It's not good for the mill....especially w/ a new mill.....the application is the same as tuning it using the air throught the carb only difference is how it mixes and the consitency of airflow.....the carb has a venturi that smoothes the airflow out and lets it mix better.....if you understand the mill you'd be surprised how far you can push them...but there is a super fine line between pushing to the edge and falling off it.......just like tuning it.....I beat on my crap mercilessly but I'm the guy standing in the middle of the track all night running......it's all the wrenching after the "pushing it" days that suck.....LOL

 

[godale03]

Man I wish I had that kinda time. I hardly ever get the chance to practice. I am lobbying my soon to be father in law to use his bobcat and make a track somewhere on the 800 or so acres of land that I get to look at every day. Alot of it is field though. There is a little section of land right behind my house that I could possibly snag... however I have not had success yet. I will keep trying! Anyway back to topic.... I am the guy that runs his stuff and is to stupid to know that there is something wrong! LOL Ignorance is bliss right?

Tom

 

[Plaidfish]

I am the guy that runs his stuff and is to stupid to know that there is something wrong! LOL Ignorance is bliss right?

Tom

Every track has one or 10 of those guys Tom, just 2 years ago I was one....now I end up helping people more than I'd really like to at some times (I am there to have my own fun right??) but I just remember how many times people gave me advice and stopped running their stuff to help me out......don't worry tom...one day you too will tune your mill first try and the light bulb will click on and stay on.....mine burns out every now and then...so I get a new RC.....um I mean Light....