• Welcome to RCTalk! 🚀

    Join the #1 RC community where hobbyists connect, share, and get expert advice on RC cars, trucks, boats, drones, and more!

    • Friendly & passionate RC enthusiasts
    • RC tips & troubleshooting
    • Buy, sell & trade RC gear
    • Share builds & upgrades

Breaking in new engine... Hard to pull start.

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, and others.

redhatman

Hardcore RCTalk User
Messages
1,903
Reaction score
0
Points
0
RC Driving Style
Hey, got back my RC10GT with a whole new O.S. .12 CV engine in it. This thing has so much more compression than my last engine (WOW!) anyway, I am trying to get it started to start the break in process, but it never pulls through and actually starts. I set it to factory settings and was going to do the heat cycle method, but I can't even get it started. It is REALLY hard to pull the pullstart, but most everytime, you can hear the engine almost starting. I am leaving the glow igniter in there, and it still doesn't start. What else could I try? Thanks
-Pat (redhatman)
 
redhatman said:
Hey, got back my RC10GT with a whole new O.S. .12 CV engine in it. This thing has so much more compression than my last engine (WOW!) anyway, I am trying to get it started to start the break in process, but it never pulls through and actually starts. I set it to factory settings and was going to do the heat cycle method, but I can't even get it started. It is REALLY hard to pull the pullstart, but most everytime, you can hear the engine almost starting. I am leaving the glow igniter in there, and it still doesn't start. What else could I try? Thanks
-Pat (redhatman)


lean it out some, if its ALMOST starting. umm if its hard to pull, pun some after run oil in it to lube it up the first time. thats what i did. it helps.
 
Heat it up with a hairdryer for 5-10 minutes before you attempt to start it. The heat from the hairdyer will expand the internals and loosen them up to make for easier starting. You can also loosen the glow plug slightly to help the engine turn over, but remember to tighten it back up after you have the engine started.
 
aj200415 said:
lean it out some, if its ALMOST starting. umm if its hard to pull, pun some after run oil in it to lube it up the first time. thats what i did. it helps.

Some manufacturers recommend this, but I caution against it as it almost always ends up that you put too much oil in and then the start takes much longer to make happen.

I'd go with sweetdiesel's recommendation. He is accurate in all his advice.

- Loosen the plug about 1/4 turn or less.
- Heat the engine block for about five minutes with a hairdryer
- Stick with the factory presets for the engine when it comes to the break in.
- Make certain you have a fresh battery or power source for your glo-ignitor.
- Make certain you have a functional glo-plug (check it by removing it from the the engine. Place it in the glo-ignitor and you should see a nice bright yellow to white glow from the coil. If you do not see this, either replace the batteries in the glo-ignitor or replace the plug.)
 
ok, ... for heating it up, how hot should i make it to. I have a temp gun now, and can take the temp, (YES)
 
Depending on the power of the hairdryer, as hot as you can get it in about five minutes. You may not be able to get it up to normal operating temps (around 250 to 290), but anything hotter than cold iron will make the engine easier and more cooperative for starting.
 
SkyMaxx said:
Some manufacturers recommend this, but I caution against it as it almost always ends up that you put too much oil in and then the start takes much longer to make happen.

I'd go with sweetdiesel's recommendation. He is accurate in all his advice.

- Loosen the plug about 1/4 turn or less.
- Heat the engine block for about five minutes with a hairdryer
- Stick with the factory presets for the engine when it comes to the break in.
- Make certain you have a fresh battery or power source for your glo-ignitor.
- Make certain you have a functional glo-plug (check it by removing it from the the engine. Place it in the glo-ignitor and you should see a nice bright yellow to white glow from the coil. If you do not see this, either replace the batteries in the glo-ignitor or replace the plug.)


all id add is make sure the idle gap is set right (about the thickness of a credit card) and maybe turn the throttle trim up to about 15-20% for starting

EDIT..if your .12cv is really hard to pull take out the glo-plug & turn the car upside down and pull the starter a couple times, the engine may be flooded

...a .12cv shouldnt be really hard to pull the starter even a brand new one
 
Last edited:
Good addition. Forgot about that one. Been too long since I needed to fight with an engine to get it to start.
 
SkyMaxx said:
Depending on the power of the hairdryer, as hot as you can get it in about five minutes. You may not be able to get it up to normal operating temps (around 250 to 290), but anything hotter than cold iron will make the engine easier and more cooperative for starting.

ok, ... but where do I take the temp from? Point the temp gun down in the engine head and point at the glow plug? Thanks for all your guys' help.
-Pat (redhatman)
 
ya you should always take them temp with the temp gun pointing strait down at the plug. Thats were me and many others get ht most accurate reading of our engines.
 
ok guys... so does this sound good for tomorrow... I will put some after run oil in and spread that around. I then take the hair dryer and heat it up for 5 minutes. Then try to start the engine. Is that good? Or should I also do something else? Thanks
 
for sh3ts & giggles ...i would recomend taking the glow-plug out and turning the car upside down to remove the fuel in the cylinder then reinstall the plug ....i think the engine is flooded & thats why its so hard to pull the starter & not starting
 
retarded pilot said:
for sh3ts & giggles ...i would recomend taking the glow-plug out and turning the car upside down to remove the fuel in the cylinder then reinstall the plug ....i think the engine is flooded & thats why its so hard to pull the starter & not starting

that sounds like it might work, but why did you say for sh3ts & giggles ...?
 
cause I'm in a good mood ...... i guess its kinda a old fart way of saying for the heck of it...can't do no harm
 
without hearing the engine or feeling the resistance of the pullstart can't be sure

but it sounds like its flooded to me and what will it take maybe 1 minute to find out?

i would still follow the other advice about heating the block turning up the throttle trim etc.. but first check if its flooded

you are priming the engine by putting your finger over the exaust (without the glo-plug igniter on) and giveing a couple pulls till you see fuel reaching the carb ...right?
 
retarded pilot said:
without hearing the engine or feeling the resistance of the pullstart can't be sure

but it sounds like its flooded to me and what will it take maybe 1 minute to find out?

i would still follow the other advice about heating the block turning up the throttle trim etc.. but first check if its flooded

you are priming the engine by putting your finger over the exaust (without the glo-plug igniter on) and giveing a couple pulls till you see fuel reaching the carb ...right?

yup, I am priming it by that.
 
Back
Top