ROto Start
 

Well I guess I have to tear it all apart, the roto start, (small Gear) just destroyed it self... So Back to pull start if I can find one, since my original pull start broke also... I cleaned the one way, and with it being internal, how do you keep oil off it???

best not to use a fuel with more than 12% oil and store your vehicle with the nose down so oil wont sit in the bearing.
I have pullstarts for the .28 motor www.racernine.com
they arent listed yet but we do have them in stock and they should be on the site by the end of the week. if you want to order one sooner email me for price.

Fuel
 

I am running sidewinder fuel 20% nitro and 12 % oil... and the engine loves it, when I first broke in this engine I was very impressed, now it is over heating and then the pull start went, then I got the rotostart from geggs?? on ebay, and I guess since it wasn't very good made, the small gear broke in half, after I cleaned the one way... too much poop for a cheap roto start I guess... Maybe I will just get a Sirio .30 Engine for it?? parts for this sts 28 is just hard to get a a LHS...

did you check our web site my computer guy got the parts we have, listed already. the roto start kits will be here by friday

Give me a photo of the small gear. I want to know how it's broken. Maybe I can send the replacement to you. We also sell the small gear separated at a very cheap price. You can order a spare from Ryan.

When I find that it is hard to produce a perfect pull-start backplate or roto backplate,then I change the price of those parts to the cheapest compare to other manufactories. Also the piston/sleeve set. I have tried to make it better. Hope you understand. As my tests,those parts never have problem. I know that is because I know our engine and it always started at the first pull.

hello all
 

Hey Dino, I lost my head shims for my .28 . Is there a place where I can purchase new ones ? thnx FOMOCO007 :cry:

if you are in the US
www.racernine.com

Thanks , received them today ! These STS engines are no joke ! I know my tranny will have a short life behind this .28 :nod:

check it out!
http://www.rcpics.net/view_single.php?medid=65146
believe it or not? it is the same engine as yours. just replace with a water cooler head.

you got your shims already? are you the guy in kentucky?

NASTY !!!!!!!

kentucky hillbilly !
 

hey guys, ive been on vacation. Yeah I got them that day I posted that message ! fast.... That boat is really kicking it up ...WOW ! I wish I could get my .28 to run like that. I ran it for two or three tanks with the aluminum gasket gone after I lost it. (didnt realize at the time) The two copper ones i had but unfortunatly I think it may have claimed the life of my piston and sleeve :cry: But then again it would bogg out and smoke like crazy then die before also. Im not sure what gives....I wouldnt called it broken in by any means , but I have pulled the plug and turned it over and I feel VERY little resistance. From reading around here that tells me that it is somewhat loosening and lapping correct right ? It has amazing take off then if you keep it hammered it will die. even at halve throttle and perhaps less. and it always smokes real bad right before it dies...thnks guys.

back your needles off and retune starting with the hsn first. remember to adj just a little at a time. when you get to the point that the motor dies at full rev with your hsn back it off to where it doesnt. then adj your lsn for good take off. also make sure your tank pressure line is in good condition and is about 6 to 8 inches long.

sts. power house
 

:cool: Can anyone tell me, how many gallons you run thru before rebuilding it.2,3,4 or so, looking at putting in tmaxx , tranny is full of robinson gears, rdl cvd's, seems like it should hold up, robinson diff is coming .

the .28 we have used for racing has at least 4 gals thru it and has been tortured and ran at over 400 a couple times due to a binding diff. And it is still running strong and has tons of compression, So unless something major breaks I really dont know how many gals you could get out of a taken care of motor.

Cure for my STS.28
 

I fixed my problem with my sts .28. after all the problems I had with it, Pull start breaking, roto start breaking, oneway stopped working , even after super cleanning it 4 times, running 20% nitro/12% oil sidewinder fuel. OH it is only has had maybe 1.5 galloms through it. I bought a Collari .32 . WOW what a engine. it makes thet sts . 28 seem like a .12 compaired to it... plus rinning with 19/47 gearing. it only runs at 22o degrees all day long, so I took my sts . 28 out in my boat with me on the Hudson River here in NY. and used it as a fishing wight!! it is only what it was good for... and then it snagged on something under water.. OH well good place for it!

Some people can enjoy 12+gallons of use out of an engine. Some people never have trouble with rotostarts. I can't really comment on the STS .28 engine's durability as I don't own one. On this thread, Dino has gone out of his way to help people with their STS engines.

This probably isn't the most appropriate place to completely pan the STS in favour of an engine that costs nearly twice as much. It's a real shame you & your STS didn't get on.

It seems some have had alot of success with the STS - look at the race results from Ryan that posts here.

Here here! Dino, Ryan, and Glenn have been extremely helpful.

It is too bad you have had such a bad experience with the .28 motor. But i am glad you are happy with the collari motor, it would suck to get another motor that didnt work out. It seems that no matter what brand you decide to go with there is always the chance of not being happy with it. I work at a chevy dealership and we get customers that love thier vehicles and others that absolutly hate them, To those we suggest maybe you ought to try a ford because it seems that no matter what you do to remedy thier problem they are unhappy.
Again glad you found a motor that works for you. This stuff is supposed to be fun afterall :) :)

I dont know if you guys have checked out the vids on racernine's sight but just for a little info if you have watched the mammoth mash2 vid where racernine is driving my mammoth and the wheel comes off right at the end.
That mammoth was powered by the sts.21b motor with a 12/17 cb and stock two speed trans. We would have easily won by at least two laps if the wheel thing wouldnt have happened. It totally outran everything there that night. Thats what got me hooked on sts motors I got that one off ebay for $135 and it was blowing by $300 sirio motors that night.

my ex sts .28
 

Well I must say, it was a very powerfull engine during its short life, I have been into R/C since 1976 and I have had many engines, AIR/ truck/car and marine, and diesel conversions.. and this sts .28 was NOT the worst I had, my main problem with it was NO ONE had the one way bearing. no one in my area can get parts. I guess my problem was that I got it off ebay.. NO more for that.. before I got the sts .28 I read a lot of good about it, then once I had my problems with it, I check'd other forums (RC Universe) and they didn't have any good to say about it? Like I said before I was impressed with it. in the beginning. it did what I wanted to do with it. Bit this WERKS COLLARI .32 is an awsome engine. cost only 159.95 at a LHS. Plus it is doing twice of what I want it to do.. I am sorry if I hurt any ones feelings, but maybe I just got a lemon!

Maybe a lemon, dont know. Some items are just cursed ! lol..

like ryan6682, im hooked on STS engines. The Dragon 5 port .12 (D5) engine got me hooked, its over 1.5 years and had a hard life. I damaged the sleeve when dropped the head down that .1mm too far and got bad detonation, and we wont talk about the time I dropped the piston on the pavers will we. She still goes strong :)

Though im eyeing off the D3R engine sitting on my bench, I think its time it got a run :)

And the D21B in my buggy is still coming to life as it breaks in..

Not many people sell them, that's for sure. But there are both US and UK suppliers for these engines - both have posted details here.

I've seen very little in the way of bad stuff written about these engines, though this thread does encourage those with problems to discuss them so that they can be ironed out.

i am having this little problem with mine now
when i pull the pullstart it doesn't roll back if you know what i mean
well i have taken the pullstart off and it works awesome when i have it in my hand but as soon as i screw it on it doesn't retract anymore :cry:
i know that somebody said (can't remember who) not to tighten the screws to much so i tried that to
i tried all kinds of tightening from loose to very loose
man i am stuck here
please help me out

sounds like yuor one way bearing needs cleaning. while you have your pullstart off feel how hard it is to turn the shaft as this is what your return spring in the pullstart is having to turn to rewind. if it is stiff remove the backplate and clean the oneway bearing . if it is still stiff you may need another one way bearing.

sts.28 connecting rod problem
 

Hey guy's i just picked one up ,got it off ebay great deal .but the pic's show them as silver block,mine is black ,is it newer off the line color of the blocks being sold now ?.Also took the back plate off to check for casting particals, one of the cleanest motors i've ever seen inside.Problem the connecting rod oil groove is facing the back off the block not the carberator side does it have a groove on both sides or should this be pulled apart?Sorry ryan6682 :cool: i should have checked your prices first

Check if there is an oil hole at the bottom of the grove, the hole side needs to be facing the front of the engine. Newer cranks are groved both sides.

another championship trophy for racernine and the sts.28 motor, we just won the rdlogics fall offroad championships race in the expert truggy class, using the same sts.28 motor that we used in the odonnells race, should have a link to some pics and vid in a few days. won by two laps using our custom chassis mammoth and sts motor, other contenders were running the hot bodies truggy with rossi 8port motors.

Congratulations on your win. You guys make us proud.

Question;

Is the engine you use a Dadders modified one, or is it stock?

Also, do you use the stock pull starter on this engine or do you use a starter box?

Last, if it is a Dadders modified one, Can I get one exactly like that, or would that not be advisable. I like to bash, including drag racing, not track racing.

Dennis

we had dadders experiment on that one as we werent planning on using it .We have another but didnt have time to get it broken in for the race. So we went with the old one. Dadders can modify your to be like ours but it does burn a ton more fuel as he did something to the transfer ports.
We use a starter box as we dont want to rely on a pullstart for racing.
contact dadders for info about his port work. He can probably tell you more about what he is able to do for this motor.

Thanks,

The STS .28 I have is in my MGT and I use the roto-start and is turning out to be my favorite engine.

My only regret is the, sorry to say, weak pull start that I am forced to use when I put the STS in my Savage. If I could find a more reliable pull start (more reliable spring) or a roto start that would work off the corner, I would have one in my Savage immediately.

Anyway, keep up the good work, and maybe you could convince STS to somehow get a more reliable pull start. Actually I would think it great if they even simply offered a better pull start as an option to buy seperately it would be good. I can't find any other that will fit their shaft or backplate.

Dennis

Dear Dennis,
Would you please do a test for me? I send one stainless steel spring to you. If the new spring is ok to you,I thought it is ok to everyone. With mine weak arms,the spring will never break...
Please PM me your address & phone number!
Dino

Dino...

Thanks for your offer, I sent you a PM with my address, phone and e-mail.

I hope you can send the new spring already installed in a pull start assembly, as I can not seem to be able to re-wind a spring into the spool.

As I stated in my PM to you, when I receive the new pull starter with the Stainless Steel spring, I will immediately buy another new STS .28 from Racernine.com to use for the pull starter testing.

I want another STS .28 anyway for my Savage as my current one is in my Associated MGT with your roto-starter on it. Naturally, working and running great.

I think starting out on a new engine will be the most fair test of the starter, and hopefully, we can all win.


Thanks

Dennis

i broke my pullstart to last friday and it was the spring to
i fixed it with another spring from another brand but i don't know if it will hold up
i also noticed that sometimes (this was a couple weeks ago) the pullstart would't return after i pulled it, first i tought the spring but that was not the case (then)
so i took the rear off the savy and started to investigate
when the pulstart was blocked and i would hit it with the back off a screwdriver it would return :eek:
strange
when it took it off the engine and into my hand i could pull it a 1000 times without stopping
BUT suddenly it stopped
then i saw that the "thing" where the cord rols onto came out and "jumped" over one off the 2 copper screws that are there to keep it on his place
so there was play on it but how could i solve it????
after thinking on this problem for about an hour suddenly it hit me
why not shim the "rolling" thing a little backwards??????
(a little more deeper into the housing off the pullstart)
so i searched and searched until i found those shims i used to shim my diffs (kyosho ones) and they fitted perfectly over the notch that is 13 mm
i used 3 off them and since then it worked fine
until last friday when the spring snapped that is :ha: :ha: :ha:

My first two engines where pullstart (force .21 and hyper 8). Many times I had to pull the things apart :flaming: , fixing broken springs and rewinding. The starter box must be one of the best investments, its just a pitty MT guys can't use them :(

there is a solution to get off the pullstart
you can buy the rotostart backplate or i heard that it is even possible to fit a tiger drive on a savage

STS .28 Savage Roto start
 

I've had my STS .28 in my Savage a couple of weeks now and I'm very pleased with it, it has certainly got more power than my HPI K46 engine.

A couple of things worth mentioning, I ran the first few tanks of fuel through it with it mounted on my bench, started by the roto start I brought for it at the same time, the small gear inside broke up even though I had the glow plug loose every time I started it, but the good thing was the small gear is the same as the HPI roto start I used on my K46 so I simply put this in the STS roto start back plate and it worked great.

One of the head bolts came loose during the first tank of fuel but luckily I noticed this before the engine had got hot but worth checking before you run yours for the first time.

The roto start will not work in a Savage truck, the HPI version has the shaft input in the top left corner of the back plate for a reason, to miss the rear diff cross member. I am using the pull start that came with the STS engine and it is working fine, seems to be stronger than my org HPI version was.

All in all very pleased with the way this engine performs.

ANOTHER WIN FOR THE STS .28
http://www.racernine.com/images/RDlo...ruckTrophy.jpg




link to vid of the one of the qualifiers


http://www.racernine.com/movies/05-10-RDlogicsRace.mov


right click save as

The chassis setting is unbelievable good! Who did it?