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Kieth:
good to hear some other information on this new engine from Mercury, but its not a Mercury Racing built or manufactured engine, its a Stillwater produced engine I believe. This engine is the only big block non racing engine Mercury will offer to all US boatbuilders in all staes as I understand.
I am not sure though about his CA only statement as the new all states FED EPA rules call for catelized marine emmission engines for all states I believe where the engines are under 500HP. The new emission engines must have by law a 3 or 4 year emissions system warranty which also covers exhaust and induction and certain other engine systems which specifically by law does not allow any changes, modifications or rework of any of these systems on the engine after it is sold. This is what I have been informed of by the EPA, NMMA and certain industry contacts. If this has been changed or modified recently I am not aware of any other exemptions. Obvously anyone can buy one and modify the exhaust and void the warranty, but with the electronic emissions controls I am not sure it could be reprogrammed for modifications. Even though these new exhaust are big and ugly I am also not so sure they will rob alot of horsepower as they may have a pretty good runner and riser systems as Mercury has been making in the last 7 or so years on the 496.
I think this new 502 Mercruiser engine has new oval port (for torque) aluminum heads and a newly modified version of the oval port 500-525EFI intake manifold with a new top plenum which is configured for a round 90mm throttlebody that will allow DTS type control. I don't know all the specs on the engine or internals, but it could have all forged internals.
I am not sure its blueprinted like the HP525's and I am not so sure it can produce equivalent HP levels with its heads and a modified exhaust system.
I am also curious if you or anyone has been given an idea of what this new engine will sell for, but I will guess and say a lot more than the 496 it is replacing, especially with the expensive emissions equipment and systems.
We can thank those wonderful people in the air quality management industry and legislators who think a few thousand boats will ever have a reasonably measurable effect on air quality for their limited operating hours annually versus the millions and millions of trucks and vehicles plying our roads highways and byways??
But remember if they don't come up with and get all this legislation and laws in place, they won't have the jobs their wondeful industry has created!! MAKE LAWS-MAKE WORK!!
Sound familiar?? Sleep tight , your elected officials are awake tonight!
Best Regards,
Ray @ Raylar
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