What pitch prop...?

[olecajun3]

Recently purchased a 191 F/S with a 150 Honda, motor came with a 17 pitch prop, but I was not getting that good of holeshot and was only turning about 5700 rpm at top speed. So I had it cut down to a 16 and it did not get any better. Any help?

[OspreyVic]

Can't help you with your prop, but welcome to the web site.

Found out our prop was just what we needed, but had to learn how to properly trim the motor. Some old folks like me just take a little longer to learn.

[jack7265]

olecajun3, I checked out the specs on a Honda 150 four stroke, and at full throttle you should be operating between 5000 to 6000 rpm. Check your manual to be sure that this is correct. If you adjusted your trim while at full throttle, and you were getting about 5700 rpm, then the 17" prop you had on was pretty close. If you were able to keep the rpm under 6000 rpm with the 16" prop, the 16" prop will give you a little better hole shot, but not much.

I'm sure you know that you trim all the way down when you take off, and trim the motor up to a point just before there is any cavitation, which is a position where the cavitation plate is about parallel to the water surface. Hope that helps.

[jack7265]

olecajun3, check post #5 on this thread Ventilation-Lower Outboard? , I just posted it a few minutes earlier

[Old Barney]

Welcome...I see we are both new members! I spoke to several manufacturers at a recent boat show and all said that if you are rated at 6000 WOT RPM, and you are getting between 5700-6000 you are in the right prop size range.

I agree with the other members comments and would add from my experience...Any number of factors also play a role in "hole shot" and planing issues. What is the weight load, weather/wind sea conditions, amount of fuel in tank, etc. The more time you spend on the boat in varying conditions, the better you will get the "feel" of your individual boat and power set up. What it can and can't do is real important for those of us that fish near rough inlets. Take some time now behind the wheel until you feel comfortable with "your boat".

Last...the trim range of most outboard engines is relatively small. You should make "small" adjustments in the trim angle. It won't take long to get the "feel"...things like steering torque will also let you know when you have it right. Hope this was of some help.

[Putershark]

Originally Posted by olecajun3

Recently purchased a 191 F/S with a 150 Honda, motor came with a 17 pitch prop, but I was not getting that good of holeshot and was only turning about 5700 rpm at top speed. So I had it cut down to a 16 and it did not get any better. Any help?

Prop pitch is not the total picture... # of blades, blade cup, material of the prop, fuel quality, type of engine oil, engine hours, boat loading, etc. etc. when all "combined" has a role in engine / hull performance. Make small changes and track till you get it all "dialed" in