Buying spare prop - Questions

[bstat1020]

Hello, I am sure the old pitch queston has been asked a million times here but if someone could help me with my setup that would be appreciated.

I have a Harris FloteBote 20CX. Mercury 60HP EFI Bigfoot with a 11P prop on it currently. 5500 WOT RPM and 19MPH. I am looking to get some moretop end speed. We cruise alot and dont do a lot of towing watersports. Looking to get to get to 25MPH if possible.

Typical load is wife, 2 small kids, cooler, and typical gear(lifevests, anchor, snad toys etc..)

Any help would be great.

bstat

[jimrs]

I don't think a prop is going to help you reach your goal. You might want to start looking for a bigger motor first.

[cwag911]

25 isn't happening with a 60.

[Bamaman]

You'd need to switch over to a 90 or the largest motor allowed on your boat to get 25 mph out of it. A 115 hp motor may be required to get you up to the speed you desire.

The larger motor would make the boat much more seaworthy, and ultimately pleasurable.

[yellowk9]

You would struggle to get that with a two pontoon boat and a 90 with a full load. I agree you're asking for the impossible with your current motor. I have a 90 on a 20' with two pontoons and 27 is the fastest I've ever gone and that was in a river going downstream with a light load

[killerkernrich]

I have a merc 60 4 stroke just me 20 gals fuel bimmi down slight rear wind gps 18mph wot 5000rpm 11pitch thinking to put a 9 pitch on what do you think then??

[Bamby]

I have a merc 60 4 stroke just me 20 gals fuel bimmi down slight rear wind gps 18mph wot 5000rpm 11pitch thinking to put a 9 pitch on what do you think then??

I'd think that an 11 P would or should be near perfect for your boat. Did you purchase it new or used? You may be experiencing issues of run-ability such a fuel restriction due to a dirty fuel filter, or maybe spark plugs that are somewhat fouled or need re-gaped or replaced. But anyway in your case I'd check out the maintenance items for being right first before I'd be buying and replacing props on the boat.

[bstat1020]

Ok Agreed that 25mph is not realistic. I am still buying a spare prop which is the title of my thread. Any luck with top end speed if I go to a 13p prop?

[BobG]

I'm going to look for a self-adjusting zero-slip 99.9% efficient prop. That should get my barge up to...hmm...40 MPH with my 115 at 50% throttle. All I have to do is find a good source of unobtanium, to make the prop myself. Oh, and I also will have to coat my toons with a teflon/unobtanium blend to give me zero drag. Shoot, if I had that, I could go 40 on a 10 HP kicker! Perfect!

[mippel]

I'm going to look for a self-adjusting zero-slip 99.9% efficient prop. That should get my barge up to...hmm...40 MPH with my 115 at 50% throttle. All I have to do is find a good source of unobtanium, to make the prop myself. Oh, and I also will have to coat my toons with a teflon/unobtanium blend to give me zero drag. Shoot, if I had that, I could go 40 on a 10 HP kicker! Perfect!

But how would you stop?

[BobG]

But how would you stop?

That's the best part! Just like always - put it in reverse! DUH!!!

[bassn429]

I had a 14 x 12p on my new 60 bf and got 19mph and only 5200 rpm at wot . I switched to a 4 blade prop 13.8 x 10p and now i get out of the hole alot quicker and hit 21mph per gps. And at wot i hit 6100rpm perfect.