I have a 18'8 bass boat and I am running a Turbo 1. My RPM's are 5000 and my top speed is 55mph. I have a great hole shot. My question is my rpm's are low. What can I do to get them up. I have a manual jackplate. Also would it better to go down to a 21p prop? Please if any can help if you can...
Posted By: gary purdy
Re: prop - 01/06/18 11:30 AM
What boat and motor? First thing I always check is the throttle activation. Is it going to full throttle? If that checks out I would check out Steves custom props on setting up motor height.
Most outboards need to be turning at least 5500 rpms WOT. Check what Gary mentioned and make sure your tach is accurate.
sorry it's a Mercy 150 EFI. Oh and the water pressure is around 12 to 15.
Posted By: Pat Goff
Re: prop - 01/06/18 04:13 PM
Details.
What boat?
Jack plate?
What kind of load?
Better the details the better the answer.
it's a cobra bass boat and its has a manual jack plate I run two people about 325 lbs. 3 trolling motors batteries and one starting battery.
Posted By: Pat Goff
Re: prop - 01/06/18 09:30 PM
Raising your motor will increase rpms.
You can go up 1/4” at a time until you lose speed, lift or water pressure. Then back one click and you’ll know where that prop can run.
All that said turbo is still a turd. If you want potential it’ll come from a 23 Yamaha M or merc tempest of the same pitch.
I’d lean to the M a bit more.
Proper boat setup takes time.
What pitch is the prop you are running? My 150 EFI on my 18.5 ft Avalanche boat does best with a 21" Trophy 4 blade.
3X better hole shot that the 23" Tempest it came with and 2-3 mph more on top end at 5500rpm.
The Tracker Avalanche is a heavy boat. Tops out around 3000 lb with 2 people and full tank.
Posted By: Pat Goff
Re: prop - 01/07/18 03:15 PM
Avalanche is a different critter. Actually every avalanche is different. I've had the joy of setting up three of them and all three needed different setups/props/plates/accessories.
Posted By: gary purdy
Re: prop - 01/08/18 03:17 PM
Hard to compare any 2 boats or motors. Some just simply run better than others. Even 2 props with the same pitch will be different. Different props can require a different motor height.
Posted By: Pat Goff
Re: prop - 01/08/18 03:47 PM
I was trying to be kind to an avalanche owner, it's one of those looks good on paper type hulls.
The three we setup were all different, one had 6 degrees negative angle on the transom, one had five degrees positive transom angle, and one that was the biggest pain to subdue had a 3" rocker in the hull.
Like Gary said, no two anything are identical. All you can do is start here and figure out where to go from there.
I was trying to be kind to an avalanche owner, it's one of those looks good on paper type hulls.
The three we setup were all different, one had 6 degrees negative angle on the transom, one had five degrees positive transom angle, and one that was the biggest pain to subdue had a 3" rocker in the hull.
Like Gary said, no two anything are identical. All you can do is start here and figure out where to go from there.
I guess I lucked out. Mine is flat like the earth:) Runs 60 GPS with no jack plate.