YAMAHA 150 2 STROKES VS A 4 STROKE

I RECENTLY PURCHASE A SEASWIRL 1851 DC BOAT WITH A 150 HP YAMAHA 2003 ENGINE. IT RUNS GREAT BUT I WOULD LIKE TO GET A 150 FOUR STROKE ENGINE ON IT DOES ANY ONE KNOWS WHAT WOULD BE THE FUEL SAVINGS IS IT WORTH SWITHCHING AND HOW MUCH WOULD I GET FOR MY 2 STROKE ENGINE. MY MANIN REASON FOR SWITCHING IS THE FUEL SAVINGS<br /> THANKS GILTON

Re: YAMAHA 150 2 STROKES VS A 4 STROKE

It would take years to make up the difference in fuel savings by getting the 4-Stroke at this point. A 2003 Yamaha 2-Stroke is pretty fuel efficient, anyway. I don't know what you would get for your motor. It would depend on if you trade it or sell it outright. What's the model number of the motor?

Re: YAMAHA 150 2 STROKES VS A 4 STROKE

Hi,<br />Your Yamaha 150 2-stroke is it a:<br />- "150 2-stroke" (carburators)<br />- "150 V-max Carburated"<br />- "150 2.6L V MAX OX66" (direct fuel injection, DFI)<br />- "150 2.6 L HPDI" (DFI)<br />- "150 2.6L V MAX HPDI" (DFI)<br /><br />If You have direct fuel injection on your present 150 hp Yamaha 2-stroke you will not save that much fuel by changing to Yamaha F150 4-stroke.<br />And an engine change would probably only be reasonably economical if you have a HPDI now since it is worth more $ on second hand market. Otherwise there will be large gap in money up to a F150.<br />Although Yamaha F150 is a fine outboard and fuel efficient it seems difficult that better fuel economy on this outboard can pay for the upgrade to a 2004 F150. As far as I know any of the 150 HPDI models and the F150 is comparable in price (in my country) and if you have a HPDI outboard (2003) you should not need to pay so much to get a F150 (2004) instead.

Re: YAMAHA 150 2 STROKES VS A 4 STROKE

It takes just about as much fuel to get 150Hp out of a motor. Doesn't matter if it's a carbureted 2-stroke, EFI 2-stroke, DFI 2-stroke, or 4-stroke. The big savings comes below full throttle. DFI 2-strokes and 4-strokes are much more efficient than carbureted or EFI 2-strokes at lower RPMs.<br /><br />There was a comparison of 225s. One was a DFI and the other was a 4-stroke. The DFI edged-out the 4-stroke in just about every category, but they were pretty close.<br /><br />So, if you're running balls-to-the-wall all of the time, you won't save much gas over the others with any particualr design.