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Thread: Merc V6 History
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03-05-2021, 03:47 PM #6766000 RPM
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03-05-2021, 03:54 PM #677The Historic Photo Master
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...and recall you saying in a long previous post, that the single cranks journals & the rod bearings failed under load, as they were underengineered for the task. of course, a second engine was put together, but...well...you know...what was that einstein quote about the definition of insanity?...
Last edited by FUJIMO; 03-05-2021 at 03:56 PM.
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12-19-2021, 03:47 PM #678Platinum Team Member
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Hey Jerry,
What an awesome thread you have gotten a couple thousand people drooling over. Bravo!
I do have a question, On the X12 motor that You had made, What was the flywheel driving? Fuel pump? Distributor? If it was a fuel pump why the redundancy?
Thanks again man!
Jesse
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12-19-2021, 08:38 PM #6795000 RPM
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[QUOTE=SkywayGT;3322652]Hey Jerry,
What an awesome thread you have gotten a couple thousand people drooling over. Bravo!
I do have a question, On the X12 motor that You had made, What was the flywheel driving? Fuel pump? Distributor? If it was a fuel pump why the redundancy?
Thanks again man!
Jesse[/QUOT
Thanx Skyway --- Actually the flywheel (which is on the rear crankshaft) doesn't drive anything. It has the normal magnet structure for triggering the ignition for that engine, but that's it. --- Refer to the picture on entry #478
i know it looks like I'm using all kinds of fuel pumps here and I am but they're all necessary. -- The fuel injection system requires somewhat more fuel pressure than the usual diaphragm pumps can put out. I couldn't use an electric pump because the alternator doesn't put out enough current to support it. So I had to utilize a belt driven gear pump instead. What you see is the belt from the front crankshaft driving the brass high pressure pump underneath the fuel bowl. The fuel bowl has a float valve inside and receives low pressure fuel from the two diaphragm pumps which are connected in series. When we first tried to start the engine it wouldn't fire because the belt driven pump just wasn't spinning fast enough at cranking speed. So I had to add a small electric pump in parallel and wired it into the start circuit. Started fine with that and got the engine spun up enough the big pump could take over. -- Good Question!Last edited by rckid74; 12-21-2021 at 04:10 PM.
Never up --- never down!!
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12-21-2021, 05:17 PM #680
How were the two cranks joined ? Gears at the bottom ?
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12-21-2021, 05:49 PM #6815000 RPM
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Yes! Just the gears in the gearcase. i had planned to put a set of gears up just under the engines in the adaptor plates tying the two driveshafts together if needed but never got that chance when the project was canceled. i would have preloaded those gears high enough to prevent any free play.
Last edited by rckid74; 12-21-2021 at 06:03 PM.
Never up --- never down!!
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06-26-2022, 12:17 PM #682Junior Member
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I have a question: How many Mercury V6s were produced between 1976 and the end of the opti run?
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06-26-2022, 03:38 PM #6835000 RPM
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07-30-2022, 08:38 PM #684Member
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Very interesting Thread. Thanks for the inside story of the history of the V6
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07-30-2022, 11:34 PM #6858000 RPM
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Merc V6 production run from 1976 to 2018.
In this video at the beginning you will see two boats flipping. That is Cees vander Velden and Bob Hering, and both were using Merc inline 6 power. Renato Molinari leading the race, in the photo, is also using inline 6 engine.
However, Boat #6 is Bob Spalding powered by the First V6 Merc in racing competition. The race is in Europe near Koblenz Germany. Ron Anderson and two other Mercury engineers brought the engine from Wisconsin to Europe in 1973.
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07-30-2022, 11:47 PM #6868000 RPM
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With Loop Charged Induction does the engine achieve a better fuel burn ratio (less non-burnt fuel) in the chamber, than the Cross Flow Induction system?
Therefore, creating a cleaner exhaust, and generate more horsepower - relative to the same cubic engine size.
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07-31-2022, 01:32 AM #6878000 RPM
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07-31-2022, 07:25 AM #6885000 RPM
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Kitch thanked for this post
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07-31-2022, 01:10 PM #689The Historic Photo Master
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...42 year build run of this superior engine. just wow......
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rckid74 thanked for this postDd24skater liked this post
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07-31-2022, 08:16 PM #6908000 RPM
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If Loop Charged Induction is more efficient than the Cross Flow Induction, then why was CFI introduced as a viable system in outboards?
Both LCI and CFI seem to be mechanically (moving parts) on a equal physics platform. With trapped fuel-burn-performance going to the LCI system.