Why Doesn't Mercury Up The Cubes On Big Outboards?
03-27-2015 | 06:35 AM
#11
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From: Clarkston, Michigan
The 7s are a different story. They took a car engine and bolted it vertically to a gear case. Mercury has been on top of the game developing outboards with proprietary components. Just wondering why they're stuck on 2.6 liters.
03-27-2015 | 06:48 AM
#12
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From: yorktown,va
It could be the weight...the 400's are 400 lbs lighter than a 7, that gives them a power to weight advantage. Then again they could just be trying to get the most out of that design before having to redesign and retool for more displacement.
03-27-2015 | 07:14 AM
#13
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From: St. Pete Beach, FL
Hondas 3.5 v6 is the only variable valve timing outboard i know of .its a big 60degree sohc unit .real simple real durable .real expensive . But oh the possibilities of something like that in a 8.2 v8 version. Especially pre-cat
could have your radical cam for off idle , and no wake zone reversion proof cam profile at idle
of course there is the cadillac blower motor outboard think its the 7 . 5.3 liter ? Unholy expensive
could have your radical cam for off idle , and no wake zone reversion proof cam profile at idle
of course there is the cadillac blower motor outboard think its the 7 . 5.3 liter ? Unholy expensive
03-27-2015 | 07:18 AM
#14
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From: At the office.
When it comes to 4 strokes large ci = heavy. They can typically make more power with less weight with a high reving smaller CI engine with forced induction than they can with a big CI engine NA engine.
03-27-2015 | 07:39 AM
#15
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From: Minneapolis, Mn
better yet why are they still using the old iron duke 3 liter 4 cylinder that is from the late 50s! there are some wicked 4 bangers out there today i keep telling my boy if something happens to his vw passat with a 2.5 5 cylinder i want to put it in a boat, that engine is ultra smooth sounds wicked and rips i think merc is hurting the entry level boats by not marinizing a few better engines
I have my feelers into GM about getting a marine Manifold for one, as I can get one of those motors fairly easy. Would be great set-up for my pontoon that I'm already building a LS1 for. Same hp half the weight.
