Originally Posted by
TOPGUN WINNER
WALBRO CARB ADJUSTMENT / LOW END FIRST
· Both Needles Set To 2 Turns Out (Always Start Rich) (SEE NOTE)
o Low : Closest To Engine
o High : Farthest Away From Engine
· Start Engine At Lowest Throttle Setting
· Let It Slowly Warm Up For One Minute ( DO NOT REV IT UP)
· If Engine Stutters Or Quits While Slowly Going From Idle To
Full Speed It Is “Rich” On The Low End (We Set It That Way)
· Slowly Turn The Low Needle “In” Until You Can Go To Wide Open Throttle
· Lean The Low End FIRST Until You Have The Highest Rpm Possible.
· High End Setting Can Best Be Found By Starting At Rich Setting.
· Lean The High End Very Slowly Until Max Rpm Is Achieved. Stop!
· Do Not Adjust For Lower Rpm… You Will Be Too Rich.
Now:
· Your Engine Is Never Too Lean
· Your RPM’s Are At Maximum
· Rapid Transition Is Achieved...
NOTE: YOU CAN START WITH “FACTORY SETTINGS” FOR YOUR HIGH AND LOW NEEDLES SETTINGS: ONLY
IF YOU ADD ¼ TURN TO EACH. YOU MUST ALWAYS START RICH SO YOU ARE ALWAYS LEANING THE MIXTURES.
This is the fastest way to adjust your engine for Maximum RPM and safest for your engine longevity.
check the timing first: TLH101 IS RIGHT ON!
WOW, it has been a little over 9 years since I posted on this thread. Thanks for the info. My 4.2 is still running good.