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Author Topic:   Yamaha 4s 100 on Montauk
dchapp posted 09-17-2001 10:34 AM ET (US)   Profile for dchapp   Send Email to dchapp  
Had a new Yam 100 4 stroke installed and the dealer put a 17 pitch stiletto stainless prop. Great hole shot and boat seems to top out at 42 to 44mph at 6000 rpm, it hits the rpms easily, maybe a litte more than 6000. Has anyone had any experience with a 19 inch pitch, will it take it?
Soho posted 09-17-2001 11:45 AM ET (US)     Profile for Soho  Send Email to Soho     
Just out of curiosity, what year Montauk, what size was old engine ( if applicable ) and how does the boat sit in the water with the extra weight.



Bigshot posted 09-17-2001 12:03 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Ask the dealer to try it. If you are just at 6000 or 6100, try a double cup. It will bring you down about 200rpms and make your prop more like an 18".
dchapp posted 09-17-2001 12:11 PM ET (US)     Profile for dchapp  Send Email to dchapp     
Boat is a 1985 and the engine was a 1985 johnson 90. I bought the boat and ordered the engine after running the boat once. The boat may sit a little lower in stern, but not much. I also relocated battery to the console to get more weight forward.
Dinny posted 06-08-2005 01:50 PM ET (US)     Profile for Dinny  Send Email to Dinny     
I have the same question. We use the Montauk primarily in Tahoe & we have a 13X19 Alum prop & it achieves 6000rpm easily and will do 40. I am told that the 13 1/4 X 17 Stiletto would be equivilent?

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