boat question

boat question

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boat question - 7/3/2008 7:58:10 PM

wezel

Posts: 14
Joined: 3/16/2008
Status: offline

Hello I am running a 25hp four stroke on a 17' smoker craft.It is a console steer and with gear fuel and two people it only goes 10 mph. If anybody is running something similar or has any advice on making it faster it would be greatly appreciated. I put a hydrofoil on it didnt seem to help

Post #: 1

RE: boat question - 7/3/2008 8:20:26 PM

bridgeman

Posts: 69
Joined: 7/3/2007
Status: offline

How are you propped? What are your RPM's at wide open throttle and about how much does the boat weigh normally loaded.

(in reply to wezel)

Post #: 2

RE: boat question - 7/3/2008 9:22:11 PM

wezel

Posts: 14
Joined: 3/16/2008
Status: offline

I am estimating the weight around 1400 lbs and the prop is 9 and a quarter x 10 not sure on the rpm though they sound slow do not have a tach. I can get a hand tach from work where should i check it at? Thanks

(in reply to wezel)

Post #: 3

RE: boat question - 7/3/2008 11:07:47 PM

gobyking

Posts: 951
Status: offline

What model and year?
Sounds like it is a deep v with a high freeboard.Might just not have enough motor with that weight.

(in reply to wezel)

Post #: 4

RE: boat question - 7/4/2008 12:10:03 AM

pghmarty

Posts: 4406
Joined: 12/5/2004
From: Bradford Pa then Pittsburgh
Status: offline

quote:

where should i check it at

Look in the service manual for the tach connection-if you don't have one, get it.
It will save you a lot of time and money.
This may help:
http://www.foreandaftmarine.com/ob%20tack%20guide.htm

PS: Don't forget to set tach for the number of cylinders and 4 stroke

(in reply to wezel)

Post #: 5

RE: boat question - 7/4/2008 1:39:32 PM

Trout About

Posts: 738
Status: offline

a 10p prop sounds too steep for a boat of that weight. I'm running a Lund of similar length and weight, actually a bit heavier. I only get 6-8mph with my kicker (20hp 4-stroke w/8p prop.)

< Message edited by Trout About -- 7/4/2008 7:44:32 PM >

(in reply to wezel)

Post #: 6

RE: boat question - 7/4/2008 3:56:16 PM

bridgeman

Posts: 69
Joined: 7/3/2007
Status: offline

Look at the back of the boat with the motor trimmed all the way down, see if the cavitation plate is about the same elevation as the bottom of the hull. You may have hung the motor too low.

(in reply to Trout About)

Post #: 7

RE: boat question - 7/8/2008 10:06:12 PM

The Sack

Posts: 16
Joined: 2/26/2008
From: Gibsonia
Status: offline

I have a similar set up, with a 16 foot deep v boat. Check the things the other guys are saying, but what you are getting sounds about right to me.

(in reply to wezel)

Post #: 8