The best diagnosis of degraded main-bearings, front or back, is to simply turn the crank-shaft with your fingers. Any roughness indicates some wear. When to replace the bearings, is a matter of choice. It is better to replace them prematurely than too late, in that the outer bearing ring may start to rotate into the casting, destroying the engine, if not replaced in time, should the bearing seize up. I have concluded that they last about 50 hours on four-strokes using 5-10 % nitro and 18 % oil at maximum 10.000 rpm. The replacement procedure is quite easy and straight-forward. No special tools needed.
Thanks! So glad i came across your video. I have been racking my brain around similar symptoms on my engines. No bearing noise that stands out but front leakage, ignored it when it was running good but now having issues. Has to be bearings in my case, I've never considered replacing before but also was not sure what to look for. Motor is 10yrs old has many gallons through it. Looks like my fleet of nitros is getting new bearings this winter. I always thought that the part of the crank that passes between the bearings made the air seal and the front bearing was more for dust. But I can see it contributing now (most my experience is low strung nitro airplane engines). These things rev crazy high to so more rapid bearing ware should be expected. Thanks again appreciate it.
Adam Drake My LHS has a HoBao Hyper Nitro VS 80% built kit on special offer, 25% off, that's about $200. I'd value your opinion on that, as a starter car. Thanks
also crankshaft play slop when pulling back and forth on the engine shaft exsposed when your clutch bell is removed. crank bearing on clutch side usually takes more wear than backside bearing. but then again adams crankshaft bearings cost more than most new nitro engines. your contract clause with mugen is to restricted, bring out rhonda. yes the video was good. the drake knows.
Thanks adam, now that you mention it, i might need to change the bearings on my novarossi mantra as it does seem to not idle like it did. I have tuned it, but it keeps dying.
Thank you very much for this video, as always super explained, so I can understand it. Is there a tool that you recommend to change the ball bearings yourself? I have only seen the tools from REDS and Hudy.
Also flaming out when on the throttle. When your engine dies for no reason at all and you can't keep it running even after changing the glow plug you have a bad inner crankshaft bearing. The crankshaft is hitting the engine case.
@@AdamDrake I did ran a tubing cutter around the piston ported the engine case and sleeve. Put in a new set of ceramic bearings and she ripped. Over 13 minutes on a tank of fuel on a smaller outdoor track. 30% 8% oil
Depending on the fuel you use, how often you replace the filter, and how you store your engine, it can vary quite a bit. Sometimes the bearings will outlast the engine, but in other cases the bearings will go out first.
Hello.after run oil and bearing oil is used.Because 1 person say to me to buy the oil.I don't know the oil is function or not.Can you explain for me what oil is used too for nitro RC hsp
My hubs look different the screw to keep the hub on has nothing to place a hex key into to take out it looks like it’s a double sided pin like looks like a pool
Just done my first nitro race and my first 3 heats car was running good then the last two heats it cut out twice not on a jump just on flat part of track, my idle good, top and bottom is tuned good, normal 1 gap on carb. Trying to figure out what it is going on? Going to replace all fuel lines, new clutch, what maybe is the issue?
Please please help me my rc car tires are moving all by it’s self with out me touching the transmitter does that mean my sevro is bad or is it my transmitter because I put new batteries in my transmitter today
@@AdamDrake nice. Thanks for the response Do you plan on doing any live streams or like a q/a. ? An i would love to hear about how you end up racing with mugen. Like, what made you change or why you ended up with them now.
@@AdamDrake Good news to hear that. Thanks for the crucial info, from me an everyone at Phil Hurd Raceway. Thanks for your Tuning an Set-up wizardry UA-cam videos. Those videos have helped me more than any other sources.
Killer info bro! Thanks for sharing! Cause sharing is caring! Quick ??? How often should you change tank? I change every 2/3 gallons! Is that to much? And i bash pretty hard! But some freinds havnt changed tanks for every! Is it something im doing! Im Always having tank issues? Or is it something else! Please help me! Mr ambassador! Lol! Thanks nitro bro 4 life!😎✌🇺🇸💥💨⛽💪
Thank you! Are you changing the tanks every 2-3 gallons because of a problem? You may be mounting the tank too tight, I like to run my tanks pretty loose and they seem to last a really long time. ua-cam.com/video/yOvpWjWdIGY/v-deo.html
Thanks again. Great info Adam. Absolutely 💯 percent Crucial to know and understand.
My pleasure, thank you!
The best diagnosis of degraded main-bearings, front or back, is to simply turn the crank-shaft with your fingers. Any roughness indicates some wear. When to replace the bearings, is a matter of choice. It is better to replace them prematurely than too late, in that the outer bearing ring may start to rotate into the casting, destroying the engine, if not replaced in time, should the bearing seize up.
I have concluded that they last about 50 hours on four-strokes using 5-10 % nitro and 18 % oil at maximum 10.000 rpm.
The replacement procedure is quite easy and straight-forward. No special tools needed.
Very good points!
Love it... thanks so much for all you do and the time to make these videos...
Cheers
Thank you!
thank you so much Adam, this is what im looking for.
My pleasure!
Thanks! So glad i came across your video. I have been racking my brain around similar symptoms on my engines. No bearing noise that stands out but front leakage, ignored it when it was running good but now having issues. Has to be bearings in my case, I've never considered replacing before but also was not sure what to look for. Motor is 10yrs old has many gallons through it. Looks like my fleet of nitros is getting new bearings this winter. I always thought that the part of the crank that passes between the bearings made the air seal and the front bearing was more for dust. But I can see it contributing now (most my experience is low strung nitro airplane engines). These things rev crazy high to so more rapid bearing ware should be expected. Thanks again appreciate it.
My pleasure!!
Good video Adam, clear and to the point👍
Thank you Brian!
Great info again. Thanks for taking the time to do this. 👍
My pleasure, thank you!
Adam Drake My LHS has a HoBao Hyper Nitro VS 80% built kit on special offer, 25% off, that's about $200. I'd value your opinion on that, as a starter car. Thanks
Thanks
Hope you have video talk about how to know when we need to replace the connecting rod too.
Yes, I can add that to my video to do list. Thanks!
Waiting for that video to 👍
Great information Adam👍
My pleasure!
Thumbs up ...thanks adam
Thank you very much!
also crankshaft play slop when pulling back and forth on the engine shaft exsposed when your clutch bell is removed. crank bearing on clutch side usually takes more wear than backside bearing. but then again adams crankshaft bearings cost more than most new nitro engines. your contract clause with mugen is to restricted, bring out rhonda. yes the video was good. the drake knows.
Thanks!
Thanks adam, now that you mention it, i might need to change the bearings on my novarossi mantra as it does seem to not idle like it did. I have tuned it, but it keeps dying.
Yes, it could be the bearings or low on compression and the piston/sleeve set needs to be resized.
@@AdamDrake is that something that you could do. The resizing part I mean
Another great video, 👍👍
Thank you!
Great info!
Thank you Jerry!
But bought a used mta4 replacement bearing only it got stuck now perfect stove helped
Yes, heat should help.
Thank you very much for this video, as always super explained, so I can understand it.
Is there a tool that you recommend to change the ball bearings yourself? I have only seen the tools from REDS and Hudy.
Novarosi as well and protect! Is the best priced! Amain
My pleasure, thank you! I use the tools from GRP, but the Reds and Hudy tools will also work well.
Thank you!
Also flaming out when on the throttle. When your engine dies for no reason at all and you can't keep it running even after changing the glow plug you have a bad inner crankshaft bearing. The crankshaft is hitting the engine case.
Wow, how much fuel do you have through the engine?
@@AdamDrake around 16 gallons
I would say it's time to have it looked over and gone through.
@@AdamDrake I did ran a tubing cutter around the piston ported the engine case and sleeve. Put in a new set of ceramic bearings and she ripped. Over 13 minutes on a tank of fuel on a smaller outdoor track. 30% 8% oil
What’s a general maintenance schedule for these bearings? What kind of service life can you expect to get out of these engine bearings?
Depending on the fuel you use, how often you replace the filter, and how you store your engine, it can vary quite a bit. Sometimes the bearings will outlast the engine, but in other cases the bearings will go out first.
Where can i get that shirt from?
What's happening Rajaa111!!! We did those shirts for the 2019 On-Road World Championship. Let me see if we have any left.
can the front bearing be removed without dismantling the engine
No sir.
Very cool
Thank you.
You're welcome adam drake🙏.thank's for reply
Hello.after run oil and bearing oil is used.Because 1 person say to me to buy the oil.I don't know the oil is function or not.Can you explain for me what oil is used too for nitro RC hsp
We offer the oil on www.thedrakeracing.com and have a video using it for storing nitro engines.
I've an lrp 32 run good but left sat after run but stiff pulling bit wd40 starts first time good power not great could a bearing be the couse thanks
10-4
My hubs look different the screw to keep the hub on has nothing to place a hex key into to take out it looks like it’s a double sided pin like looks like a pool
Is it a different brand hub?
Just done my first nitro race and my first 3 heats car was running good then the last two heats it cut out twice not on a jump just on flat part of track, my idle good, top and bottom is tuned good, normal 1 gap on carb.
Trying to figure out what it is going on? Going to replace all fuel lines, new clutch, what maybe is the issue?
Maybe email me a short video to be able to listen to the tune?
@@AdamDrake my email is markapperley5@googlemail.com
Or what's u email thanks
Please please help me my rc car tires are moving all by it’s self with out me touching the transmitter does that mean my sevro is bad or is it my transmitter because I put new batteries in my transmitter today
It sounds like the servo could have some slop and it's trying to find center.
@@AdamDrake I ordered a new sevro and it’s comeing tomorrow thanks for your help
If changing the front bearing , is it Necessary to also change the rear bearing ? Will the rear give out next and soon ?
It’s not necessary, but usually done at the same time to be safe.
@@AdamDrake I figured. Thanks
Killer vid. But what dose mugenseiki stand for or mean. Is it 2 last names put together
Means unlimited machinery work! Wikipedia
Thanks!
Yes sir!
@@AdamDrake nice. Thanks for the response Do you plan on doing any live streams or like a q/a. ? An i would love to hear about how you end up racing with mugen. Like, what made you change or why you ended up with them now.
@@AdamDrake your welcome! Dont mean to impose! Just helping! Yeh! Let me know on my ??? Im on your messanger aswell! Thanks
What about after run seeping out the front?
That's fine if you applied a lot of thin after rung oil. It's really only a concern if it's leak after or while the engine is running.
@@AdamDrake Good news to hear that. Thanks for the crucial info, from me an everyone at Phil Hurd Raceway. Thanks for your Tuning an Set-up wizardry UA-cam videos. Those videos have helped me more than any other sources.
Killer info bro! Thanks for sharing! Cause sharing is caring! Quick ??? How often should you change tank? I change every 2/3 gallons! Is that to much? And i bash pretty hard! But some freinds havnt changed tanks for every! Is it something im doing! Im Always having tank issues? Or is it something else! Please help me! Mr ambassador! Lol! Thanks nitro bro 4 life!😎✌🇺🇸💥💨⛽💪
Thank you! Are you changing the tanks every 2-3 gallons because of a problem? You may be mounting the tank too tight, I like to run my tanks pretty loose and they seem to last a really long time. ua-cam.com/video/yOvpWjWdIGY/v-deo.html
@@AdamDrake makes perfect sence! Thanks bro!
4:20 i see u
I didn't plan that, but good eye.