Author Topic: Who's ready for the first dumb question of 2018?  (Read 440 times)

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Offline Mile2885

Who's ready for the first dumb question of 2018?
« on: January 01, 2018, 02:05:12 PM »
Just put the lower unit back on and noted when taking it off the previous shop didn't line up the marks on the trim tab. Can't imagine that a 2" tab would make any performance difference if it was off. Should I just line the marks up like the service manual states and forget about it?  Thanks.

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Online Fisherdv

Re: Who's ready for the first dumb question of 2018?
« Reply #1 on: January 01, 2018, 02:27:46 PM »
Yes, line up the marks as stated in the manual. When you take the boat out, note wether the boat pulls to the left or the right while on plane with light hand pressure on the wheel. If it pulls one way or the other you can make small adjustments to it afterwards

2018, 16 ft Arima Sea Chaser, Honda 60HP

Offline StreamFixer

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Re: Who's ready for the first dumb question of 2018?
« Reply #2 on: January 01, 2018, 02:35:17 PM »
That little trim tab counter acts the rotational torque being generated by prop rotation.  If it is out of adjustment (or just plain gone) you will be constantly fighting the wheel when you should be just gently guiding it.

Your call...

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Online Fisherdv

Re: Who's ready for the first dumb question of 2018?
« Reply #3 on: January 01, 2018, 02:43:13 PM »
Basically you want to adjust that tab so when on flat water and on plane you can let your hand off the wheel, (very briefly) and the boat will stay straight. CAUTION though, do not let go of the wheel completely if you feel a pull while holding the wheel lightly, if you do the boat could quickly turn one way or the other until that tab is adjusted correctly
2018, 16 ft Arima Sea Chaser, Honda 60HP

Offline HemiGTX

Re: Who's ready for the first dumb question of 2018?
« Reply #4 on: January 01, 2018, 03:13:38 PM »
That's not a dumb question.

The trim tab makes a huge difference.  They become difficult to properly adjust with hydraulic steering, because you can't feel the effects due to lack of feedback.

AKA: "The guy who fishes with Nicole"

Offline BruceL2_Fish

Re: Who's ready for the first dumb question of 2018?
« Reply #5 on: January 01, 2018, 03:21:40 PM »
I have mine marked so whenever I remove it I know where it is supposed to be positioned when I re-install. 
As Hemi said not a dumb question at all.
2012 Sea Ranger 19 (M. LaDeane)
Suzuki 115 Four Stroke
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Offline Mile2885

Re: Who's ready for the first dumb question of 2018?
« Reply #6 on: January 01, 2018, 03:48:57 PM »
Looks like the previous shop had it pointed straight with direction of travel. I'll try it and keep an eye on how it handles. Looks like when the factory marks are lined up it appears to have a slight angle to it. Figured  it was to offset prop rotation. Thanks for all the replies.

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Re: Who's ready for the first dumb question of 2018?
« Reply #7 on: January 01, 2018, 03:50:54 PM »
I have mine marked so whenever I remove it I know where it is supposed to be positioned when I re-install. 
As Hemi said not a dumb question at all.


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Online La-Z-Buoy

Re: Who's ready for the first dumb question of 2018?
« Reply #8 on: January 01, 2018, 06:56:56 PM »
As others have stated so well: it makes a huge difference when not correctly positioned. 1/4 inch rotation makes all the difference. Had to adjust my last two motors. Easy to do.
Richard

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Offline wedocq

Re: Who's ready for the first dumb question of 2018?
« Reply #9 on: January 02, 2018, 07:40:46 AM »
 :yeahthat: I would agree with what was said. but, before making any adjustments, I would first test drive the boat to see if you notice any performance issues. If not, I would just leave it. If so, make the adjustments accordingly.
-Shawn
2002 21' Arima Sea Ranger HT  Suzuki DF175 4-stroke.
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Online Threeweight

Re: Who's ready for the first dumb question of 2018?
« Reply #10 on: January 02, 2018, 10:49:11 AM »
All boats will need that tab adjusted slightly to track true on plane.  It's fairly predictable based on whether you have a right or left hand rotation lower unit/prop.  Your dealer likely adjusted it to their best guesstimate when they installed the motor.
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Online Danno

Re: Who's ready for the first dumb question of 2018?
« Reply #11 on: January 02, 2018, 11:06:04 AM »
All boats will need that tab adjusted slightly to track true on plane.  It's fairly predictable based on whether you have a right or left hand rotation lower unit/prop.  Your dealer likely adjusted it to their best guesstimate when they installed the motor.

And the feedback through the steering wheel would be different on a cable steering system versus hydraulic.
Previously owned a 1998 19' SR

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Offline GHMariner

Re: Who's ready for the first dumb question of 2018?
« Reply #12 on: February 14, 2018, 06:38:26 AM »
That's not a dumb question.

The trim tab makes a huge difference.  They become difficult to properly adjust with hydraulic steering, because you can't feel the effects due to lack of feedback.

With hydraulic steering, they can simply be removed. The purpose of the trim tab is to make the engine easy to steer, at the cost of efficiency. Hydraulic steering eliminates the feedback, and therefore the need for the tab.