150hp v6 efi mercury outboard perfomance.

[rockfish44lb]

i have a 18' deep v fiberglass tuffy fishing boat. it has a 2000 150hp v6 efi mercury outboard. love how the boat runs as is, 5300rpm 50mph wot trimmed up and everything. was just curious on what i can do to get some more speed out of it. i am currently looking into a stainless steel prop. is there anything else i can do?

 

[CharlieB]

Re: 150hp v6 efi mercury outboard perfomance.

Double check your motor to boat set up.

Mounting height should have the A/V plate 'just' at the water surface or 1/8 below at max speed/WOT, any lower increases gearcase 'drag' and starts scrubbing off speed.

To an extent, more set-back can make for even higher mounting heights, but a lot also depends on the transom angle and trim.

A general rule of thumb is 1 to 1 1/2 inchs above a line drawn straight back following the very bottom of the boat.

Some motors will make a bit more power when running nearer to the high side of the recommended RPM range. See if your prop shop will let you try props to find out which works best for your setup. You may find an inch less pitch picks up both RPM and MPH.

 

[ufm82]

Re: 150hp v6 efi mercury outboard perfomance.

That's close to my set up- Proline 190 (18.5') center console with a 150 XRi (efi) outboard. Your numbers are very close to mine but I run 5600 rpm at 51 mph at full bore and trimmed out. An SS prop with some cup will allow more trim as it won't lose grip as easily as an aluminum. You don't mention what prop you are running but I have a 19 pitch Tempest on mine and it took me 4 props to finally get to this one and it is perfect. I'll hit 42 @ 4800 rpm at WOT- start trimming up and you feel the bow lift, speed jumps and rpms go to 5600. I have a roostertail just about cowl-high and the engine sings at that number. What does your boat weigh? My rig is around 3,500 lbs with everything included.