New Savage X 4.6 hard to start when hot.

[jeepjunk94]

Having trouble getting my new Savage to restart when it's hot. It was broken-in right and I have it tuned well. It's not overheating, I tuned the motor to run between 230-250 degrease. Is there a tip or trick to getting the 4.6 going when it's up to temp. I usually set the trim to give it a little extra throttle and hold my finger over the exhaust port and have to pull the starter cord many many times to get it going. I converted mine to pull start. Just pulling the cord with no extra throttle or choking it absolutely won't get it started. Is it a case of (nature of the beast)? Or is there a procedure for starting it. Has a new glow plug and starts easy cold. Need some help.

 

[rcnut14]

I'm not quite sure. if its tuned right, than yea, its the nature of the beast. what style glow plug do u have? { hot, cold, medium}

 

[Jam Racing 1]

sounds like there is a lean condition when is hot, possibly an air leak or maybe something as simple as a lean low end....

 

[Jam Racing 1]

I would pull the engine and seal it all up and start from scratch with the tune, setting the hi needle first and follow up with the low and idle, and replace the plug with a medium heat range plug, if you put a hot plug like an LC3 in the engine you an cause more problems than you solve...

 

[jeepjunk94]

Thanks for the reply's folks, The truck was RTR and came with an extra glow plug. I have no idea what HPI put in the bag but I used it after break-in. I will give the lsn another round of adjustment and try to rich it up a bit. When your talking about sealing up the motor what are we talking about me needing to do? I can stop at the shop and pick up both a hot and medium plug and do a test. I have two other trucks both Max's and they do the same thing. I blamed Traxxas and had hopes HPI was a better brand and would not do the same as they do. Starting to think my pull start conversion was a bad idea with all the cranking I have done lately, just hated to carry the darn starter around with me.

 

[joegibbstruck]

https://www.hpisavageforum.com/threads/sealing-an-engine.1275/

 

[X]

a hot lc3 is what I use. no problems

Please do not listen to him.

A hot plug is a bad idea for that engine. You should be using a medium or cold plug. I recommend a cold plug if you run 25% or higher nitro, medium if you are running 20%. HPI's site recommends a cold plug for that engine.

 

[X]

It's about heat. The higher the nitro content the more heat you generate. A .28-.32 engine like what we use can hold alot of heat, so it doesn't need extra help from the plug. Typically people use hot plugs on smaller engines and/ or engines using low nitro content (10-15%).

 

[jeepjunk94]

Thanks for the reply and advice folks. Here is what I did yesterday after work, ok got the Savage out set needles to break-in and started over. I run it low on fuel and turned it off to refuel, pulled the cord and the one-way bearing started slipping. Brand new Savage lealing oil onto the one-way bearing. So I changed it back over to roto start.

 

[jeepjunk94]

https://www.hpisavageforum.com/threads/sealing-an-engine.1275/

Excellent!! Great info and pics.