What prop should I use

[bigeye2k]

Which prop should I use on my 2120 DVSC with a yamaha F150 I can never get any better than 2.7 mpg at cruise. 4400 rpm

 

[Megabyte]

What prop do you have now, how many rpm's are you turning at WOT, and what is your WOT speed?

That should tell us if you are over or under propped.

 

[bigeye2k]

Factory prop stainless steel. wot is 32 mph and 5200 rpms

 

[Ranger Tim]

I have had much better results with the black steel series. Check eBay for these, they are available cheap. I got mine for $75 new! I am currently running a 15 3/4 X 15 and I have a 13 3/4 X 17 as a spare. I like the 15 better because it seems to hold plane at lower speeds and it gives better mid range bite.

See my 2120 site prop page at

http://home.earthlink.net/~streagle/PrkrProp.html

Bmail me for more discussion. I have an F150 also. I love that motor!