4000M90 Cylinder head supersession
Inquiry was raised during cyl head replacement on 12V4000M90 5262000224/5 of cylinder head supersession chain.
Some clarification was needed as there are two separate supersession chains for 4000-01 marine heads, only difference being alternate suppliers of valves and/or valve springs for USA vs German manufactured cyl heads. ie; EX52904100197 are USA built, EX52904100196 is equivalent and interchangeable however is simply via German supply chain. Same applies for latest part numbers in the two chains, EX52904100397 & EX52904100358. All 4000 heads have omitted the alignment dowel in past supersessions.
· Original part # from USA built engine 5262000224/5 = X52404100028 → EX52904100197 → EX52904100397.
· Part # chain from German built example engine 527116780 = EX52904100196 → EX52904100358.