1998 14ft Sea Nymp 35hp propping

[Readman39]

Hello Everyone,
Just bought a nice 14 ft Sea Nymph with a 35 hp 3 cylinder Johnson. I'm having a little trouble planing with 3 people in the boat. It works great with 2 but can't make the hp with 3. Was going to by a new prop and wanted a little advice. I currently have a 10 in 4 blade 14 pitch prop. I going to a 10 inch 3 blade either 13 or 12 pitch. I was wonder if anyone has this boat and what type they are using. I was thinking the 13 but have a friend that thinks 12 would be better. Any thoughts? Thanks for any replies

 

[jhow0228]

Re: 1998 14ft Sea Nymp 35hp propping

If you're looking at hole shot, definitely the 12. Do you happen to know what rpm you're turning once you get planed out and at WOT? What year is the motor? You need to look into that particular motors WOT rpm range when picking a prop as well. The lower pitch will increase rpm at WOT but lower top end speed. And the opposite applies when increasing pitch. You don't want to over rev the motor or lug it either. Both can have detrimental effects.

 

[jhow0228]

Re: 1998 14ft Sea Nymp 35hp propping

If you don't have a tach on the motor, you can find one on ebay for $15 which should work fine for this purpose. Very easy to install too.

 

[Mi duckdown]

Re: 1998 14ft Sea Nymp 35hp propping

You really need correct rpm readings and GPS speed to buy the right prop.

 

[jhow0228]

Re: 1998 14ft Sea Nymp 35hp propping

Here's a little step by step:
1.) Determine the correct WOT rpm range for your motor.
2.) Find out how fast your motor is turning at WOT under typical load. Chances are with a poor hole shot, you aren't making the minimum rpm requirement, or that motor just isn't enough to handle the load you're putting on it.
3.) If you aren't making the minimum rpm you will need less pitch which will help with hole shot too.

Speed is a factor in this, but isn't near as important as getting your motor to run in the correct rpm range at WOT. Hope this helps.