Throttle Positioning
#1
Thread Starter
Registered

Joined: Jan 2005
Posts: 691
Likes: 18
From: Canyon Lake, TX
What would cause the need to have one throttle stick slightly (less than 1/4") more forward than the other at any speed in order to keep the RPM's equal between the pair of 496HO's in my 30 Outlaw???? Is it adjustable?
Thanks.
Thanks.
#3
Yes there is an adjustment either at the engine end or the throttle end. As the cables age, they stretch so figure out which one needs to be moved a little and tighten up the play in the cable.
__________________
Want your ECU tuned right?? Call Mark at Precision www.pmefi.com
Want your ECU tuned right?? Call Mark at Precision www.pmefi.com
#4
Thread Starter
Registered

Joined: Jan 2005
Posts: 691
Likes: 18
From: Canyon Lake, TX
Makes sense and being that I am not much the mechanic, will have to have that looked at. Thanks!
#6
The number one reason is that your props are not matched!
I have never had to adjust the sticks on my boat once I got a set up props labbed and perfectly matched. Stock props out of a mold are not perfect adn no two molds are identical. I have seen as much as 300 RPm difference in engine speeds with stock props requiring the throttles to be at different positions to have both engines running at the same RPM.
If you have stock out of the box props have them matched up by a good prop shop like BBlades before you start adjusting the throttle cables. If not you could loose top end RPM on one engine after the adjustment.
Good luck
I have never had to adjust the sticks on my boat once I got a set up props labbed and perfectly matched. Stock props out of a mold are not perfect adn no two molds are identical. I have seen as much as 300 RPm difference in engine speeds with stock props requiring the throttles to be at different positions to have both engines running at the same RPM.
If you have stock out of the box props have them matched up by a good prop shop like BBlades before you start adjusting the throttle cables. If not you could loose top end RPM on one engine after the adjustment.
Good luck
#7
Custom Interiors & More
Joined: Jun 2008
Posts: 1,742
Likes: 2
From: Bucyrus, OH.
Dock,
Have you ever noticed that a well matched engine/prop setup on a twin engine boat tends to gain speed after the first 1-2 miles, and a mis-matched setup tends to hit a "brick wall" at wide open?
XT
Have you ever noticed that a well matched engine/prop setup on a twin engine boat tends to gain speed after the first 1-2 miles, and a mis-matched setup tends to hit a "brick wall" at wide open?
XT
#8
There is nothing like a matched set of props on a boat. I compare it to an unbalanced set of blades on a mower.
You can tell a difference and it is smooth and sweet.
#9
#10


