How much difference is there between the 225 Opti and 225 ProXS?

[Landrum]

Just curious.

Thanks,

Landrum

[EuropeanAM]

There's a BIG difference!

The ProXS has better holeshot, crisper midrange, and a substantial top end increase. Also, HP output at the propshaft on the 225 ProXS is "nearing" the 250 mark (usually about 247HP at the propshaft).

Some of the "improvements" on the ProXS:

-Carbon Fiber Feeds
-Increased Air/Fuel Pressures with a "narrow pattern" direct injector
-Multistrike Ignition System
-Improved block porting
(Many other improvements as well.... but those are the "basics").

[Darth VMAX]

Since everyone is claiming the "247" hp for their 225 DI Bass motors. Why does Mercury even produce the standard 225 Opti if its such a dog comparitivly? I am not trying to stir the pot or anytyhing. I would think with the improvements that the Pro xs offers over the standard opti that they could just offer the Proxs with all the different shaft lengths, counter, etc. and drop the standard opti's. I think BRP does the same thing with the 225 and 250HO's (have both a standard and HO)???

Wouldn't it cut some costs for Mercury to do that?


Modified by Darth VMAX at 9:13 AM 12/21/2009

[HOMERUN]

Does the opti have better warranty / fuel economy?

[EuropeanAM]

The answer to your question is actually quite simple: As a manufacturer, the best way to maintain market share is to listen to what your customers want.

Demand is fairly high for BOTH the "standard" and the "ProXS" models in the 225 HP range: hence, both models are offered.

It's also critical to have an engine in this HP category that will withstand plenty of "lower RPM operation" (which the ProXS is not designed for). There's a great plenty of 225 Opti's on "Harbor Patrol Boats" that seldom see more than 3500 RPM's.

[Darth VMAX]

Ok, I understand listening to your customers Why doesn't the Pro like to run lower RPMS? i am not talking about "lugging" the motor. Is that what you are reffering to?

This is interesting to me and always wnting to learn something new

[EuropeanAM]

The ProXS version engines were designed after (and utilize nearly identical technology from) the Racing Engines.

There was little intention that they would spend much time at idle... other than for warmup, docking, or trailering. The "narrower" injector spray pattern allows more fuel to puddle during low RPM operation, which in turn, tends to contribute to carbon buildup and poor performance.