Two questions for F30 owners

kevin babineau · Post by **kevin babineau** » Wed May 27, 2009 7:52 am

before u get into the props i would fix the trim tabs...ps by having the trims tabs down after planing off pushes the bow into the water and she starts to 'plow'.....please note that i dont kno ur boat but that is usually a characteristic of full trim down......by having her plowing creates a load...ur WOT rpm figure will change with load ie how much fuel on board,,how much gear stowed..tuna towers..crap on bottom...chipped and pealling bottom..trim tab position....how many people on board

Agitator · Post by **Agitator** » Wed May 27, 2009 8:45 am

Props are the very last thing I would consider. You are right it should turn near 4000 at WOT. Fix the trim tabs, they make a world difference. Are you running old fuel, do the 4bbls open all the way, is your timing advancing, is your tach correct, how clean is the bottom, fuel filters/water seperator clean, gas tank vents open... lots of things to consider before props. Has it ever turned more RPM's - if so, its not the props.

ready123 · Post by **ready123** » Wed May 27, 2009 8:49 am

I agree with all the above... and would not expect a 13x11 to be over propped for your boat....

Agitator · Post by **Agitator** » Wed May 27, 2009 12:45 pm

One other thing to check: is your throttle cable opening the carbs all the way.

kevin babineau · Post by **kevin babineau** » Wed May 27, 2009 1:40 pm

id check whatever doesnt cost money first....like carb openingthottle plate and choke opened...spark arrestor...timing/advance....check gauge by borrowing someones timing light that has rpms on it....is the bottom clean? ....

jddens · Post by **jddens** » Wed May 27, 2009 6:35 pm

My 1972 F30 has twin FI merc 350's at 330hp ea, turning 15X17 wheels. WOT is about 4400rpm (rev limiter) at 33 knots GPS. 17-18 knots at 3200rpm and 8 knots at 1800rpm.......John

kevin babineau · Post by **kevin babineau** » Wed May 27, 2009 9:23 pm

330hp out of 350 nice