thinking the motors shot!

Reply Subscribe

Thread Tools

Search this Thread

08-06-2009, 11:37 AM

slayyer

Tech Addict

Thread Starter

iTrader: (29)

Join Date: Nov 2008

Location: tallahassee, FL

Posts: 695

Trader Rating: 29 (100%+)

thinking the motors shot!

this past weekend at our club race my motor cut off in the main and i could never get it started again. i can start it now but ONLY if i hit the trigger and givew it throttle, as soon as i let go and it idles, it cuts off. any ideas of what might be wrong? the compression is pretty bad also but wasnt bad at all before the race i went to. the motor only has 3 gallons through it and hasnt run over 240 EVER!

08-06-2009, 11:53 AM

losiracer78

Tech Addict

Join Date: Jan 2009

Location: Spring , TX

Posts: 513

Trader Rating: 0

Have you changed out the glow plug. I would check that first.

08-06-2009, 12:17 PM

halfman

Tech Adept

Join Date: Feb 2009

Location: Texas

Posts: 183

Trader Rating: 0

try sealing the engine too

08-06-2009, 12:48 PM

Akhor

Tech Master

iTrader: (8)

Join Date: Feb 2008

Location: Alberta,Canada

Posts: 1,401

Trader Rating: 8 (100%+)

Did it hit it's breakin point and just need to be re-tuned?

08-06-2009, 01:22 PM

token

Tech Elite

Join Date: Mar 2009

Location: Aurora, Colorado

Posts: 4,644

Trader Rating: 0

Quote:

Originally Posted by Akhor

Did it hit it's breakin point and just need to be re-tuned?

+1 retune......

08-06-2009, 01:25 PM

losiracer78

Tech Addict

Join Date: Jan 2009

Location: Spring , TX

Posts: 513

Trader Rating: 0

change the plug and retune

08-06-2009, 01:36 PM

midwestcajun

Tech Fanatic

Join Date: Oct 2008

Location: St. Peters, MO

Posts: 832

Trader Rating: 0

Think you should sell it. I'll take it off your hands for cheap

Seriously sounds like a tuning issue though..if you said it dies when it gets hot I would think otherwise. Usually that's a compression issue. Idle up and see where you get. Also you might have to fumble with the low end.

08-06-2009, 02:25 PM

houston

Tech Prophet

iTrader: (96)

Join Date: Sep 2004

Location: Sherwood,OR

Posts: 15,844

Trader Rating: 96 (100%+)

Quote:

Originally Posted by slayyer

check plug, replace if bad , turn your idle up to get it running and retune the engine .

08-06-2009, 02:36 PM

losiracer78

Tech Addict

Join Date: Jan 2009

Location: Spring , TX

Posts: 513

Trader Rating: 0

Quote:

Originally Posted by houston

check plug, replace if bad , turn your idle up to get it running and retune the engine .

If anyone would know it would be Monty the Great Motor Man

08-06-2009, 04:47 PM

#10

slayyer

Tech Addict

Thread Starter

iTrader: (29)

Join Date: Nov 2008

Location: tallahassee, FL

Posts: 695

Trader Rating: 29 (100%+)

its leaking oil and gas out of the bottom of the head and going up the button and leaking out..would that be a busted shim?? or a button issue?

08-06-2009, 05:25 PM

#11

slayyer

Tech Addict

Thread Starter

iTrader: (29)

Join Date: Nov 2008

Location: tallahassee, FL

Posts: 695

Trader Rating: 29 (100%+)

BUMP, any help?????? would be greatly aprecieted!

08-06-2009, 05:33 PM

#12

The Working Man

Tech Fanatic

iTrader: (1)

Join Date: Jan 2008

Location: All Over So. Fla.

Posts: 985

Trader Rating: 1 (100%+)

If it still has some commpresstion? tear it down,clean it up, seal it up, re-set it to break-in settings and go. Take a close look at the o-rings on the needles, and fresh fuel lines, new glo-plug, and you should be all set. Or just break out 2-3 hundred and buy a new one. Me, I always go cheep first,then blow the flow. Or you could send it to one of the motor guys on here and let them do it.