johnperdeye
RCTalk Racer
i am about to change my front seal out again on my .28 lrp motor has anybody had this problem
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another front seal problem wtf
- Thread starter johnperdeye
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johnperdeye
RCTalk Racer
- Thread starter
- #3
less than a gallon of fuel and this will be the second front bearing in it i guess I'm gonna try ceramic bearings
All engines will leak oil if you let fuel sit in it for long periods. I myself use After run oil liberally, in the carb and down the piston and sleeve area.
I don't change the Front bearing unless the bearing is allowing too much play. That will destroy the engine.
I don't change the Front bearing unless the bearing is allowing too much play. That will destroy the engine.
Huh... I have 4 gallons on mine and it's original (LRP28S3). I didn't notice any excess play or oil leaking out. Now that it's been pickled with ARO and sitting in a baggie all winter, there are droplets around the crank bearing, but that's to be expected after sitting so long with excess oil in it.
A few guys at a LST forum suggested keeping an eye on the bearings in that engine though due to lower quality issues. They say the engine is a great engine, but the bearings are sub-par. So, I've kept an eye on it, but don't notice anything out of the ordinary.
A few guys at a LST forum suggested keeping an eye on the bearings in that engine though due to lower quality issues. They say the engine is a great engine, but the bearings are sub-par. So, I've kept an eye on it, but don't notice anything out of the ordinary.
Scrogg
Hardcore RCTalk User
I'd have to say the bearings are probably fine so long as there is not play in it, seals popped off, etc. SH engines tend to make a really horrible lean run-on sound when the engine is too fat on bottom. They also will cover the front of the engine with all that excess fuel, it's gotta go somewhere.
Leaning the LSN will usally make the sound disappear, and give some great performance, easy starts. I have seen a lot of people lean the HSN too much and try to compensate with fattening the LSN. It does not work on these mills. if this happens to be someone's case, they need to lower their idle afterwards and richen their HSN to the type of driving they are doing.
I am not trying to insult anyone's tuning skills here BTW. Just trying to offer some knowledge that I figured out the hard way. I too have changed a few front bearings unnecessarily.
Leaning the LSN will usally make the sound disappear, and give some great performance, easy starts. I have seen a lot of people lean the HSN too much and try to compensate with fattening the LSN. It does not work on these mills. if this happens to be someone's case, they need to lower their idle afterwards and richen their HSN to the type of driving they are doing.
I am not trying to insult anyone's tuning skills here BTW. Just trying to offer some knowledge that I figured out the hard way. I too have changed a few front bearings unnecessarily.
johnperdeye
RCTalk Racer
- Thread starter
- #8
front bearing leaking fuel out the front when running the motor goes from a lean to a rich condition no matter how i tune i could lean the motor to where it runs good 30 seconds later it running pig rich.....the way these 2 stroke motors work that front seal has to be sealed up or it will leak air out due to the crank intake window being right there therfore creating a lean/rich condition
