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Author Topic:   PROP for 13'/35HP Evinrude
labelboy posted 08-06-2001 03:51 PM ET (US)   Profile for labelboy   Send Email to labelboy  
I need to know what pitch/diameter prop I should use on a 13' Whaler w/ 35hp Evinrude. Year of both is 1981. I cruise the harbor at low speed with an average of 300-400 lbs total weight inside the boat. I sometimes go outside and open her up for maybe 10-20 minutes but that's rare. I've heard maybe a 10"dia/13 or 15 pitch would be good. I have no tach or no exist. prop to use as a guide. CAN ANYBODY HELP ME?
Bigshot posted 08-06-2001 03:55 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
10x13 is PERFECT. With less weight a custom 10x14 would work. !0x15 is too big. With me as a 120lb kid it rocked. Put another 120lb kid and it was a dog. 10x13, you'll be happy.
Clark Roberts posted 08-07-2001 07:54 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
Labelboy, try to get some test props and run them before making final decision! I have had great performance from the older 2 cyl OMC 35's using an OMC SST prop with 11" pitch... "fly before buy" is best policy.. Happy Whalin'... Clark.. Spruce Creek Navy
Dr T posted 08-07-2001 01:20 PM ET (US)     Profile for Dr T  Send Email to Dr T     
I have been running an 11 x 9 at high altitute (7400 ft) pulling kids on a big inflatable. It is ok, but not too fast. I am thinking about backing down to a 10 x 11 for the Denver area (5400 ft).
Bigshot posted 08-07-2001 01:55 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
without a tach you can't really guide it very well. The 10x13 on my 82 35hp would redline close to 5400-5500. I understand where Clark is coming from but when I tried an 11" it would go over 6k(damn good holeshot though).
Peter posted 08-08-2001 11:29 AM ET (US)     Profile for Peter  Send Email to Peter     
Way back, on my '74 13' with '77 35hp Evinrude, I used a 10 x 13 SS for cruising around and a 10 x 11 aluminum (original prop) for skiing. 10 x 13 worked well with two in the boat, over two the motor started to bog down a little bit. 10 x 11 provided good hole shot, but motor seemed like it was going so fast it was going to jump off the boat.

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