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how to eliminate torque feed back?

Posted: Mon May 25, 2015 2:38 pm
by sfoster
As the title suggests im having a hard time with torque feed back through the steering. My 19br with the 888 drive will really give you a work out. I do not have power steering and nor can I afford to retrofit a system in. I've only taken the boat out a few times and still trying to get a feel for the trim. This old tub is nothing like the 18 ft pontoon with a 40 hp. That I was running last, about 10 years ago. Any advice or suggestions would be appreciated. Im not sure what I should be looking for.
I bought a trim anode but the prop interfered with it.
Also it has a hydo_foil on it. Is that hurting me any?

Re: how to eliminate torque feed back?

Posted: Mon May 25, 2015 5:32 pm
by jhnmdahl
So the trim tab hangs down into where the propeller spins? Normally, the propeller would be in front of the trim tab, so I wonder a bit if there's an incorrect propeller or trim tab for the sterndrive? A quick search shows there are a bunch of different Mercruiser anodes, some of which look like they're designed for propellers that sit back further:

http://www.boatmania.com/prop-trim/trim ... uiser.html

It looks like the 31640 tab is recommended for the 888, but the 46399 is recommended for applications with particularly high rake propellers:

http://www.boatzincs.com/MER46399.html

A trim tab is probably still the best choice to tune out pulling to one side, or moderate torque steer. It's a little counter-intuitive to adjust, though, because it's essentially a rudder on a rudder. In a nutshell, if the boat pulls right, move the trailing edge of the trim tab right.

Hope this works out for you,

John

Re: how to eliminate torque feed back?

Posted: Tue May 26, 2015 8:09 pm
by sfoster
Thank you so much for the links. I believe that the prop May be the reason for the interference. I still need to learn how to find out what prop is on it. Thanks again.

I just picked up a anode that must of been stock.