Idle Speed and Mixture
Adjustments
IMPORTANT: Do not turn idle mixture screws
tightly against seat, as damage to seat and/or
needle may result.
Thunderbolt IV Equipped Engines
PRELIMINARY IDLE SPEED AND MIXTURE
Initialstartsettingsaregivenfollowing.Makefinalad-
justment with engine running (refer to “Final Idle
Speed and Mixture”).
1.
Turn idle speed screw until it contacts throttle
lever.
a
a
71171
a - Idle Mixture Screws (Needles)
b
70474
a - Idle Speed Screw
b - Throttle Lever Contact Point
2.
Turn idle mixture screws (needles) in (clockwise)
until LIGHTLY seated, then back out 1-1/4 turns.
Index
5B-14 - WEBER 4 BARREL CARBURETOR
90-823224--2 796
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
Thank you