Jato 3.3 and Revo 2.5 restarting issues

[HDRIDER56]

Can anyone give me some suggestions on what to do about my engines not starting again the following day after I've had them running fine the day before. All set to factory settings still, backed down the idle some so they're not racing. Both engines have been rebuilt since getting my RCs, one thing to note. The pistons in both do travel close to the top of the sleeve. I've seen some videos about the pinch spec. How much would this effect starting and restarting?

 

[johnnydmd]

I'd put the idle back up first. Should be .5-1.0 mm gap in the carb. Anything out of the range is no good.

Next check the glow plugs and make sure they are ok.

 

[CertifiedMike]

I'd put the idle back up first. Should be .5-1.0 mm gap in the carb. Anything out of the range is no good.

Next check the glow plugs and make sure they are ok.

This is correct.
The racing idle is prob from an air leak, cracked orings. Buy new orings and use green slime to install them. Reset the carb and see how that goes.
Good luck!

 

[HDRIDER56]

I'd put the idle back up first. Should be .5-1.0 mm gap in the carb. Anything out of the range is no good.

Next check the glow plugs and make sure they are ok.

Glow plug us brand new, using a separate igniter. Got tired of fighting that EZ start no light glow plug issues. My idle gap is right around .7, if I didn't mention it both these cars i received on the cheap for rebuild projects, the Revo was free a d the Jato was a $125. Had to get new radio systems for both. Went with the TQI/TSM with Bluetooth chip. I can get them running great one day, come back the next day or two and nothing, sure I've flooded them once or twice in the past.
Is there anyway to check the piston wear? I know you can't really do any kind of a compression check?

 

[CertifiedMike]

Did you reseal the motors when you rebuilt them? What did you use? How long ago?
Compression is ptetty easy to determine by resistance on a pull start. You can turn your flywherl by hand to get an idea too.
If it spins real easy, theres an issue.
The pinch or lack of pinch should have been pretty obvious when these motors got rebuilt.

 

[HDRIDER56]

Did you reseal the motors when you rebuilt them? What did you use? How long ago?
Compression is ptetty easy to determine by resistance on a pull start. You can turn your flywherl by hand to get an idea too.
If it spins real easy, theres an issue.
The pinch or lack of pinch should have been pretty obvious when these motors got rebuilt.

What do you mean by reseal? I used assembly lube in the beginning, I seen it was too thick and switched to Marvel's Mystery oil. Yes I could rotate the motor using the fly wheel and felt semi firm resistance at too of the stroke, the pistons were going almost to the very top of the cylinder.

 

[CertifiedMike]

Thread 'Sealing a Nitro Engine for air leaks.'

Jun 14, 2009

I borrowed this from savage central. It is a well done tutorial of sealing up an engine with RTV. I'll go through the sealing process and make one of my own to replace this.

Today I will take you step-by-step through the process of sealing your engine. Whether your engine is brand new, or you have been running it for a year or more, if you have never sealed it, now is the time. By sealing your engine from the beginning, you are eliminating most of the tuning problems that plague nitro engines. If you are having trouble keeping your engine tuned properly, chances are you have an air...

• olds97_lss
• Replies: 5
• Forum: Chassis & Drivetrain

 

[HDRIDER56]

Thread 'Sealing a Nitro Engine for air leaks.'

Jun 14, 2009

I borrowed this from savage central. It is a well done tutorial of sealing up an engine with RTV. I'll go through the sealing process and make one of my own to replace this.

Today I will take you step-by-step through the process of sealing your engine. Whether your engine is brand new, or you have been running it for a year or more, if you have never sealed it, now is the time. By sealing your engine from the beginning, you are eliminating most of the tuning problems that plague nitro engines. If you are having trouble keeping your engine tuned properly, chances are you have an air...

• olds97_lss
• Replies: 5
• Forum: Chassis & Drivetrain

I can't open the attached pictures in the post? Assuming they're important?