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How to diagnose a steering problem on a 95’ 5.7 Mericruiser?

The steering pump is ok. The steering ram is the problem there is what they call a shuttle valve that moves back and forth directing the fluid. Here's a diagram of a standard actuator. The control valve is where the problem is. Replace the actuator.graphic

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I have a 5.7 Mercruiser 1995, it all started with a power steering fluid leak. I replaced the lines, and discovered the pump bearing (bushing) had a lot of side to side free play. I replaced the pump only with a remanufactured one from the local auto parts store, in an effort to save a lot of money. Now at startup of the engine, the steering wheel immediately turns all the way to the end of the travel, and there is no power assist to turn it back. It actually built enough pressure to blow a brand new high pressure hose. It has a Blackhawk steering cylinder that also has a lot of free play in it. Any thoughts?? Is that pump required to be the marine pump? Is the Blackhawk cylinder in need of replacement? Where can I find reasonable prices on these items? ebasicpower.com offers the cylinder with quick disconnect lines for $350, the pump sells for $500 to $600. It just sounds very pricy to me. Please help.

Submitted: 7 years ago.
Answered in 17 minutes by:
8/25/2010
Tan
Tan, MerCruiser Certified Technician
Category: Boat
Satisfied Customers: 11,134
Experience: 40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.
Verified

The steering pump is ok. The steering ram is the problem there is what they call a shuttle valve that moves back and forth directing the fluid. Here's a diagram of a standard actuator. The control valve is where the problem is. Replace the actuator.graphic

Tan
Tan, MerCruiser Certified Technician
Category: Boat
Satisfied Customers: 11,134
Experience: 40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.
Verified
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Tan
Tan
Tan, MerCruiser Certified Technician
Category: Boat
Satisfied Customers: 11,134
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Experience: 40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.

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