Picking The Right Boat Prop

[fishinwrench]

Maybe Crackens tach is off. First step should probably be to have someone check your charging system output, and verify your tach accuracy.

[Cracken0812]

Maybe Crackens tach is off. First step should probably be to have someone check your charging system output, and verify your tach accuracy.

I bought the boat in February so I have not messed with that part of it so I probably should check that. I'll check that first then see about the timing/sync issue. I appreciate the help guys.

[Cracken0812]

Something doesn't sound right in the setup. If this is an 18-foot Ranger (one of the 300-series boats such as the 350, 360 or 370), that 150 should be turning at least 5200 with a 23 or 24 pitch prop.

Its a 371 champ.

[Hazbin]

Something doesn't sound right in the setup. If this is an 18-foot Ranger (one of the 300-series boats such as the 350, 360 or 370), that 150 should be turning at least 5200 with a 23 or 24 pitch prop.

You got it right Champ. I think those engines are rated 5200 to 6000 and if you lug them down you will eventually kill the motor. I have a 90 390v Ranger with a 89 200 Johnson and it will turn 5600 rpms at 64mph turning a 24 Raker with an excellent hole shot. The only draw back is the mid range is not equal to mph/rpm ( like 35mph/4000rpm ). I have been told the older original Mercury Trophy 23p x 14 1/4" prop is the optimum prop for those motors, but hard to find!. They not only give bow lift, but lifts the rear as well.

[REDSOXWSCHAMP]

i've got a 13.3/4 x 23p trophy plus prop for sale

[GNSfishing]

I used to have a 350V with a 150 Evinrude all 1983 and I ran a 24 3 blade hooter and it would turn 6000 rpm running anywhere from 58 to 62 mph depending on load in the boat. My son has it now and is running a 4 blade 13-1/4 x 27 pitch at 5500 rpm running at about the same speeds as the 3 blade but with out the torque on the steering wheel. So either you tachometer is wrong or there is a problem in the boat because it should be turning high rpm with a 19 pitch prop wide open. Your throttle may not be wide open, could be out of adjustment or something blocking the butterflys in the carbs.

[Hazbin]

i've got a 13.3/4 x 23p trophy plus prop for sale

What do you want for it?

I have a real good 26 Raker I'd like to unload! and a 4 blade 24p 13 3/4" Michigan Wheel to get rid of.

[Cracken0812]

I used to have a 350V with a 150 Evinrude all 1983 and I ran a 24 3 blade hooter and it would turn 6000 rpm running anywhere from 58 to 62 mph depending on load in the boat. My son has it now and is running a 4 blade 13-1/4 x 27 pitch at 5500 rpm running at about the same speeds as the 3 blade but with out the torque on the steering wheel. So either you tachometer is wrong or there is a problem in the boat because it should be turning high rpm with a 19 pitch prop wide open. Your throttle may not be wide open, could be out of adjustment or something blocking the butterflys in the carbs.

I did some research and if the throttle cam roller is missing or cracked, it will do as you described. Going to check it when I get home. Looks like I need to go prop shopping after I get the other stuff figured out. I will check the tach as well. Thanks.

[REDSOXWSCHAMP]

What do you want for it?

I have a real good 26 Raker I'd like to unload! and a 4 blade 24p 13 3/4" Michigan Wheel to get rid of.

$395.00 NEW IN THE BOX WITH MERCURY HUB KIT

[JF660R]

We were running a 3 blade 17p on our 85hp merc. Switched to a 21p and gain some of the mph we wanted but lost some rpm. Gonna try out a 19p and look for a happy medium.

Have bought multiple props and found a wealth of knowledge from John at John's Hot Props in Ozark.