TSB Document:

• Sorry, the NHTSA has not posted this TSB document yet.

You can still get the detailed info from Mercury for this TSB. Call your local Mercury dealer's service department & ask for a copy of TSB# 0421.

Affected Component: ENGINE AND ENGINE COOLING:ENGINE

Summary

ENGINE KNOCK DURING INITIAL COLD START, THE KNOCK WILL CEASE AFTER THE ENGINE IS FULLY WARMED UP. *TT

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