[No Bait / Lures Only]

This would be a help to owners of d underpowered f70la for starting guesstimate pitch n diameter sizes working n performance achieved.

 

[Smackdaddy53]

Are you still trying to prop your rig?

 

[crl.wms]

I suggest you call the PowerTech factory. They are good at "guesstimating" and are quite helpful.

 

[No Bait / Lures Only]

Still searching for the best version for me.
RED version was sub par performance
SCD version is closer, 17 too much pitch. Sent propeller to have it repitched n balanced. Will see after it arrives with modifications...

 

[Water Bound]

I run a 3 blade 14 pitch on my HB Guide with an F70. Gets up great, spins to 6100 and tops out at 36 mph wot. Can also run at 5000 rpm at around 26 and burn 3.5 gph. It’s not a PowerTech though

 

[No Bait / Lures Only]

I run a 3 blade 14 pitch on my HB Guide with an F70. Gets up great, spins to 6100 and tops out at 36 mph wot. Can also run at 5000 rpm at around 26 and burn 3.5 gph. It’s not a PowerTech though

That's exactly what I needed to get mine dialed in.

 

[reallyshallow]

What boat do you have?

 

[No Bait / Lures Only]

Custom aluminum flat uncle J's 18x60

 

[No Bait / Lures Only]

Prop finished n on d way home. Performance numbers next week...
Repitch n balanced $120.00 with 20% off coupon....
We will see how the workmanship is...
Props not pretty but it works. 38+ GPS @ 5900, nettles took a couple weeks to repair prop...

 

[No Bait / Lures Only]

I think the prop is ok now as it's supposed to be a 13" diameter x 15" pitch n runs good. No slippage at wot n trimmed.....
Ran the prop on friends flat 20'×6' n it turned 7000 rpm. That same flat with 17" red pt 5000+

 

[Smackdaddy53]

Smaller diameter more pitch

 

[No Bait / Lures Only]

Are you still trying to prop your rig?

Well got tired trying to get f70la to perform. N so getting a 90 2stroke modded fer replacement.

 

[Smackdaddy53]

Well got tired trying to get f70la to perform. N so getting a 90 2stroke modded fer replacement.

Man that F70 should be more than enough for that hull...

 

[No Bait / Lures Only]

Man that F70 should be more than enough for that hull...

That sounds good but when loaded 35/37 lil enemic for me. My 25 on spear did nearly as well!

 

[Smackdaddy53]

That sounds good but when loaded 35/37 lil enemic for me. My 25 on spear did nearly as well!

What speeds are you looking for? A flat bottom boat isn’t a speed demon to begin with. There’s such a thing as “hull speed” which is a speed threshold that when met you will actually begin to see speed decrease with more horsepower due to weight and resistance.

 

[No Bait / Lures Only]

Sorta agree with a true flat but hull has an 18" wide pad.

 

[Smackdaddy53]

Sorta agree with a true flat but hull has an 18" wide pad.

How fast you wanna go?

 

[No Bait / Lures Only]

How fast you wanna go?

Kinda hoping with 30+ more hp it will get me in mid 40 ranges!

 

[Smackdaddy53]

Kinda hoping with 30+ more hp it will get me in mid 40 ranges!

Oh ok