1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16

LACK OF POWER, SLUGGISH OR SPONGY
(continued)
CHECK SENSORS AND CONTROLS FOR:
1.
Possible open in Engine Coolant Temperature (ECT) and Manifold Absolute Pressure  (MAP)
sensors (Ground CKT 814). Also could have and set a DTC 14 and/or 33.
2.
3.
Throttle Position (TP) sensor circuit if DTC 21 set for open or grounds.
Using a scan tool and/or voltmeter record Throttle Position (TP) sensor voltage. It should read
less than .7 volt with throttle closed or at idle position. A sticky throttle shaft or binding linkage
causes a high voltage
4.
5.
Power reduction mode activated.
Diagnostic test CKT 451 for being grounded, (maximum RPMs be will lower).
CHECK ENGINE FOR:
1.
2.
3.
Restricted exhaust system.
Proper cylinder compression.
Proper valve timing and worn camshaft.
ADDITIONAL CHECKS:
1.
2.
3.
4.
Proper alternator output voltage..
Clean, tight and properly located ECM grounds.
Excessive resistance on bottom of boat (dirt, barnacles, etc.).
Proper size and pitch propeller for application.
Index
5C-126 - ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY)
90-823224--2  796
Product Specification
CategoriesMercury MerCruiser Manuals
Tags,
Model Year1993, 1994, 1995, 1996, 1997
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(4 votes, average: 4.5 out of 5)
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1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 SKU UPC Model
Nick on Aug 13, 2018. Exactly what I was looking for!

Hugely helpful service manual! Perfect. Thank you!


Sonthaya Traipug on May 04, 2018. Freelance Yachts Service

Manuals are all Important for Technician


Glenn on Dec 02, 2015. Nice

This book is invaluable if you do your own repairs. Great book.


Joseph on Oct 04, 2015. 1997 7.4l Bravo

Could not find a copy until a search brought me here.
Excellent print.
Thank you


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