Valve Springs ???????
07-18-2005 | 02:29 PM
#1
Thread Starter
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Joined: Nov 2002
Posts: 708
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From: SOUTHERN CALIFORNIA
Valve Springs ???????
Found A Inner Valve Spring Broken On My 525sc (1998),number 6 Cyclinder And Inner Spring On Number 8 Looks Like Is Was About To Go,190 Hrs On The Engines,Im Going To Replace All The Spring On Both Motors,any Sugestions On What To Use,oem Or Other,what Casues This,is It Just Time Or Is There Something I Can Look For???part Numbers Please,,,,,,Thank You!!!!!!!
07-18-2005 | 03:52 PM
#2
MarineKinetics
Joined: Oct 2002
Posts: 942
Likes: 5
From: Rochester, NY
Re: Valve Springs ???????
JJONES,
The correct spring for that cam was the Crane 99893:
LOADS:
CLOSED 130 LBS @ 1.850”
OPEN 330 LBS @ 1.320”
Back in the late 90’s, early 2000’s, there was a problem with spring wire that suffered from improper heat treat. Because there are only two companies that supply 95% of all spring wires worldwide this wire made its way into the system of multiple suppliers, one of which supplied valve springs for Mercruiser. Limited numbers of the springs made there way into production engines and failed. This was an anomaly, and all the inferior wire/springs has since been removed from the system and the situation corrected.
Bob
The correct spring for that cam was the Crane 99893:
LOADS:
CLOSED 130 LBS @ 1.850”
OPEN 330 LBS @ 1.320”
Back in the late 90’s, early 2000’s, there was a problem with spring wire that suffered from improper heat treat. Because there are only two companies that supply 95% of all spring wires worldwide this wire made its way into the system of multiple suppliers, one of which supplied valve springs for Mercruiser. Limited numbers of the springs made there way into production engines and failed. This was an anomaly, and all the inferior wire/springs has since been removed from the system and the situation corrected.
Bob
