Veradito-Class Four-Strokes To Use Integrated Air Fuel Module

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Author Topic:   Veradito-Class Four-Strokes To Use Integrated Air Fuel Module

jimh posted 05-07-2006 10:39 AM ET (US)
Mercury Marine will soon deliver their Veradito-class four-stroke motors. Details of these engines have been hard to come by. The most recent tidbit of information to leak out is the use of an integrated air-fuel module or IAFM.
The Integrated Air Fuel Module (IAFM) is a common component in a modern four-stroke engine. An IAFM can combine a number of components into a single assembly, such as:
--air filter
--throttle body
--control system for variable air intake
--air flow sensor
--fuel injectors
--intake manifold
--integrated gaskets and seal
--captured fasteners
The usual goal of an integrated design like this is to:
--reduce weight
--reduce intake noise
--improve performance
In their new Veradito-class 75-, 90-, and 115-HP four-stroke engines, Mercury will be using an IAFM for precisely these reasons. In some promotion literature, they mention use of an "Integrated Air-Fuel Module (IAFM), including a tuned-length manifold system...to optimize engine performance and sound quality."
Engine sound quality is the new frontier of outboard engine marketing, in case you hadn't noticed. A great deal of consumer attention is being paid to the sound levels produced by new outboard motors.
The Mercury IAFM will also include an air filter.
Development and use of integrated air fuel modules is very common in modern vehicle engines, and there are several vendors who specialize in development of components like this. SiemonsVDO and Denso are two such suppliers of integrated air fuel modules. The Dodge Magnum 5.7-liter Hemi V8 engine uses an IAFM from SiemonsVDO, for example.
Further details about the IAFM to be used in the Veradito-class engines are not known.
I guess the days of taking the carburetors off your outboard motor and soaking them in cleaning solvent are now long gone. On the other hand, replacement of a large integrated assembly like an IAFM is going to cost a small fortune.
jimh posted 05-08-2006 01:16 PM ET (US)
For more information on IAFM's, see:
http://www.denso.co.jp/motorshow/2003/en/booth/pdf/pdf08_e.pdf
jimh posted 05-18-2006 09:28 PM ET (US)
Attendees at this weekend's Boston Whaler Owner's Event in Sarasota will be able to get a first-hand look at the new Mercury 115-HP FourStroke motor.
If possible, a few shots of the motor with the cowling removed to show some of the details would be very much appreciated. I would like to see the Integrated Air Fuel Module and how it is installed on the engine.
Thanks! And have fun at the Owner's Event.
imko posted 05-19-2006 08:08 AM ET (US)
Good report Jimh! I have seen some pictures of this new
engine at my local dealer (EW Driessen in Holland) with
the new Montauk 190. Unfortunately he did not send me those
pictures.
I hope this new engine is more fuel efficient than my
Mercury 90 4 stroke (2003). You know the fuel price in Holland is more than 6 dollar/gallon.

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Author	Topic: Veradito-Class Four-Strokes To Use Integrated Air Fuel Module
jimh	posted 05-07-2006 10:39 AM ET (US) Mercury Marine will soon deliver their Veradito-class four-stroke motors. Details of these engines have been hard to come by. The most recent tidbit of information to leak out is the use of an integrated air-fuel module or IAFM. The Integrated Air Fuel Module (IAFM) is a common component in a modern four-stroke engine. An IAFM can combine a number of components into a single assembly, such as: --air filter --throttle body --control system for variable air intake --air flow sensor --fuel injectors --intake manifold --integrated gaskets and seal --captured fasteners The usual goal of an integrated design like this is to: --reduce weight --reduce intake noise --improve performance In their new Veradito-class 75-, 90-, and 115-HP four-stroke engines, Mercury will be using an IAFM for precisely these reasons. In some promotion literature, they mention use of an "Integrated Air-Fuel Module (IAFM), including a tuned-length manifold system...to optimize engine performance and sound quality." Engine sound quality is the new frontier of outboard engine marketing, in case you hadn't noticed. A great deal of consumer attention is being paid to the sound levels produced by new outboard motors. The Mercury IAFM will also include an air filter. Development and use of integrated air fuel modules is very common in modern vehicle engines, and there are several vendors who specialize in development of components like this. SiemonsVDO and Denso are two such suppliers of integrated air fuel modules. The Dodge Magnum 5.7-liter Hemi V8 engine uses an IAFM from SiemonsVDO, for example. Further details about the IAFM to be used in the Veradito-class engines are not known. I guess the days of taking the carburetors off your outboard motor and soaking them in cleaning solvent are now long gone. On the other hand, replacement of a large integrated assembly like an IAFM is going to cost a small fortune.
jimh	posted 05-08-2006 01:16 PM ET (US) For more information on IAFM's, see: http://www.denso.co.jp/motorshow/2003/en/booth/pdf/pdf08_e.pdf
jimh	posted 05-18-2006 09:28 PM ET (US) Attendees at this weekend's Boston Whaler Owner's Event in Sarasota will be able to get a first-hand look at the new Mercury 115-HP FourStroke motor. If possible, a few shots of the motor with the cowling removed to show some of the details would be very much appreciated. I would like to see the Integrated Air Fuel Module and how it is installed on the engine. Thanks! And have fun at the Owner's Event.
imko	posted 05-19-2006 08:08 AM ET (US) Good report Jimh! I have seen some pictures of this new engine at my local dealer (EW Driessen in Holland) with the new Montauk 190. Unfortunately he did not send me those pictures. I hope this new engine is more fuel efficient than my Mercury 90 4 stroke (2003). You know the fuel price in Holland is more than 6 dollar/gallon.