Filling And Bleeding - Mercury MerCruiser MCM 454 Mag MPI Service Manual

Table of Contents

1. With engine stopped, position drive unit so that it is straight back.

2. Remove fill cap/dipstick from power steering pump and note fluid level.

3. Level should be between FULL COLD mark and bottom of dipstick.

4. If level is below bottom of dipstick, but fluid is still visible in pump reservoir, add required

amount of Quicksilver Power Trim and Steering Fluid or Dexron III automatic

transmission fluid (ATF) through fill cap opening. Bring level up to FULL COLD mark on

dipstick. DO NOT OVERFILL.

5. If fluid is not visible in reservoir, a leak exists in the power steering system. Find cause

and correct.

Filling and Bleeding

IMPORTANT: Power steering system must be filled exactly as explained in the follow-

ing to be sure that all air is bled from the system. All air must be removed or fluid in

pump may foam during operation and be discharged from pump reservoir. Foamy

fluid may also cause power steering system to become spongy, which may result in

poor boat control.

1. With engine stopped, position drive unit so that it is straight back. Remove fill

cap/dipstick from power steering pump. Add Quicksilver Power Trim and Steering Fluid

or Dexron III automatic transmission fluid (ATF), as required, to bring level up to FULL

COLD mark on dipstick.

IMPORTANT: Use only Quicksilver Power Trim and Steering Fluid or Dexron IIl auto-

matic transmission fluid (ATF) in power steering system.

2. Turn steering wheel back and forth to end of travel in each direction several times, then

recheck fluid level and add fluid, if necessary.

3. Install vented fill cap.

DO NOT operate engine without water being supplied to seawater pickup pump, or

pump impeller may be damaged and subsequent overheating damage to engine

4. Start engine and run at fast idle (1000-1500 rpm) until engine reaches normal operating

temperature. During this time, turn steering wheel back and forth to end of travel in each

direction several times.

Downloaded from

https://needmanual.com/

Proper Fluid Level with Engine Cold

SERVICE MANUAL NUMBER 23

90-861326--1 MARCH 1999

Table of Contents