Need help locating serpentine belt part number

Blorton

Petty Officer 3rd Class
Joined
Apr 21, 2022
Messages
86
Hey Guys,

The numbers on the existing belt have just about all worn off and I'm not seeing one listed in the merc maintenance book. I've tried looking on a parts fiche and there's several options listed. Just trying to make sure I order the right one. This is a 4.3 TKS with power steering and normal cooling. (03 Bayliner 185, engine serial is M381342)

Thanks in advance for any pointers.
 

Fun Times

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Staff member
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May 16, 2009
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0M381342 = MERCRUISER 4.3L ALPHA 2 PC 4.3L ALPHA model number 4211025PS…

The first one on the list of the following link below would be the one needed since you have power steering and CHS is not shown in your original engine model info found doing a serial number search.
57-865615Q04
865615Q04 ← 862086 1
BELT, SERPENTINE
Notes: (Standard Cooling) (Alpha) (Power Steering)

All that mentioned, if the old belt is still ok then you usually can take it into an auto store an size it up.
 
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