get a non tuned engine from mark ...sell the tuned version ...nip you should be able to get your money back on it

stock settings ..wrap head with aluminum foil ...heat it up with a heat gun ...when it doesnt start lean the lsn a small hour at a time until it will start...when it does start it should idle at around 190-205 for an infinite amount of time .......or heat cycle it to 200 degrees ...i idled 3 tanks through mine before i put it down to run ......

here ya go GRP owners....
 

http://www.losi.com/Articles/Article...ArticleID=1897


Also keep in mind when considering your engine for the season this great perk only available through grp/losi/horizon...

When the time comes for your battle tested and seasoned engines(GRP) last breath don't panic. Simply box the engine up(minus the pipe, clutch, etc), include new bearings of your choice with the package along with name and return address. Adam Drake will recieve your engine at Horizon, clean, inspect, pinch the piston/sleeve, and install new bearings for no charge!

So for the price of bearings and shipping(approx. $60) you have a like new engine that will be nearly better than new for gallons to come!

If anyone needs the shipping address email me @ [email protected]..

Keep your eyes out @ carolinasrc.com for MArch specials on GRP engines.

Alan, your link doesn't work.

I have been using the same number 5 GRP plug going on the 2nd race season purchased 3 at the start of last year and still have not used all 3. so I can say I have not seen a problem with their plugs. If you have to go thru the 5 pack your bought I would say something is terribly wrong with the tune. Just my 2 cents

chill...send that mill to me;)


Let me fix the link.


I also run grp plugs and have great luck. I change them every couple races but save the old ones and let a racer in need run them or use them sometimes.

LOL feel free to let me use them up here in Virginia ( racer that needs them). I can use them against Jeff and Roy Jordan since they still have those OCMs but I think they still have enough spare parts left to start a hobby shop. One day they will run out and have to change, talked to him bout a Losi but he wont listen.

Do you have any pics of your buggy with motor and pipe installed? I would love to see how the pipe fits in the mbx6. The motors are back on sale at amain and I am getting ready to pull trigger.

That's two good guys right there....

lol, when he runs out of parts he will have to make a switch. I'll be working on him as well;)

My tuned has about 3/4 of a gallon on it. The compression is very light. Wont even attempt to hold at 3 o'clock but it runs consistently as far as temps go and doesn't flame out. It does feel like Im chasing a tune b/c I can't quite get the lsn right. Sometimes it will rev while in the air (jump) and if I open the lsn a hair it wants to stall, so I open the idle gap and it will rev after idle. I kind of think I just need to get it pinched or buy a new p/s.

for those who don't know A main has the grp tuned .21 on sale for $279 :eek:

sounds about right ...you must have had an air leak or ran it at excessive high temps ....meaning anything above 220

I had this happen with my tuned .21 too. It had approx 3 gal on it and I replaced everything from the front bearing to the button head to the plug. I even tried switching to GRP plugs as I have read about the angle sealing problem with other plugs. Nothing worked. I finally found a guy at my local track that is a guru in tuning. He spent about 1-2 min with it on the bench and it was really close after than. I still to this day don't know what he did but it solved the high revving/ lean sounding tune that I was getting before. 2 other things I would check. 1) the o-rings in the carb can let the needles get loose and sometimes they will move on their own. Easy fix - replace the o-rings. The HSN, LSN and idle needle should all have some tension on them, if they do not then they can move and cause you to chase a tune. 2) the idle needle is set too high. I have had my idle needle set too high and had a false idle happen. When the needle is set too high then my engine would rev high and not return to idle. It also would rev high even if it did return to idle. I would try lowering the idle and if that does not work then take the needles back to stock or to Drake recommended settings and go from there.