300XS Mercury 3.2 Stroker

[I fish 4 Bass]

I believe this is the correct section for this motor. I’ve had several Mercury’s over the years, 225 & 250’s Optimax and ProXS, most recent 250 Pro XS4S. Looking at a boat with the 300XS 3.2 stroker and trying find information on the engine. Reading it sounds like it’s more efficient than 300X. I understand it would be much more power than any of my previous boats, and probably less efficient on fuel, I just don’t want to be able to watch the gauge drop. Motor I’m looking at is 2013 with 210 hours.

Any information is appreciated.

[EuropeanAM]

Massively more efficient than the 300X.

Very similar to the 250 ProXS Optimax... it's stroked, different heads/pistons, different calibration, throttle plate and attenuator cover (ignoring differences below powerhead, of course).

In general, I would expect approximately a 10% increase in fuel consumption over the 250 Optimax (same boat/setup).

[I fish 4 Bass]

Massively more efficient than the 300X.

Very similar to the 250 ProXS Optimax... it's stroked, different heads/pistons, different calibration, throttle plate and attenuator cover (ignoring differences below powerhead, of course).

In general, I would expect approximately a 10% increase in fuel consumption over the 250 Optimax (same boat/setup).

Thank You Don. I appreciate the information.

[Gamblerman65]

Pm sent

[kllr bee]

I bought one new in 2010. I am not easy on a motor. My moto is run hard and put up wet. It has had to have one coil and an air pump. BUY IT before it's gone. Best and fastest motor I have ever had.
Richard aka Kllr Bee

[sosuok]

I bought a 2013 right at a year ago on a 24' Checkmate bowrider sport/performance boat. Motor has been great, did have one air injector replaced and have a small leak on the oil pump under the cowling but its minor and i'll fix it this winter.

As far as performance, I'm running a 24' Tempest Plus, At approx 35 mph i'm getting 10 to 11 gph, to me this seems quite reasonable, this i believe is slightly over 3k RPMs. Now if i increase the speed if starts using fuel at a much higher rate. With the price of premium fuel on the water at Lake Texoma this summer, i didn't open it up as often as I would normally.

[JOE54]

strong engines