Solved - Crazy steering issue - tiller steer aluminum boat

Old&Slow

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Joined
Jul 11, 2017
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3
I recently bought a 1995 Tracker Pro V 17, with a 1995 25 horsepower Tracker (Mercury) tiller steer. This boat pulls to the right, hard enough to tire me out after running for 15 minutes. It pulls right at idle and at full throttle. The boat is a bare bones lightweight V bottom. 6 gallons of fuel are centered in the back, a lightweight starting battery (20 lb) is also back there as well as a spare gallon of fuel. I'm 215 pounds. Boat will run 20+ mph, power is not an issue. It has a trolling motor with a group 27 deep cycle battery centered in the bow. Battery is probably 60 pounds.

Things I have done:
1. Researched the manual - this motor does not appear to have any method to tighten the steering (cinch clamp). When sitting and not running, the motor will turn right or left depending on which way you move around in the boat. In other word, it is very free. I can't let go of it without the boat turning hard to starboard.
2. Purchased a new trim tab and adjusted it as far as it will go in either direction. Adjusting the motor trim tab has very little effect.
3.. Adjusted the trim angle - it is a manual adjustment. The trim makes a difference, but it still pulls to starboard both at idle and at speed.
4. Centered the motor on the transom and moved it both left and right. It does not like being off center on the transom, but it still pulls right.
5. This is a very lightweight boat, and I discovered if I sit on the left side of the boat, the steering is almost neutral. I normally sit on the right side of the boat for ease of operating the tiller steer.

Based on (4), I am trying to figure out my next steps -- the trolling motor battery is centered in the bow. There is no real alternative place for it, but I plan to experiment with it by temporarily moving it around. If it makes a difference, I can make a permanent box for it.

Has anyone else had an experience like this? Can adding trim tabs help a steering issue like this? I need to solve this problem - it is making an otherwise nice boat very unpleasant to use.

Thanks for your thoughts.
 
Last edited:

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
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Jul 23, 2011
Messages
51,948
change your prop. some props have a bit of side thrust

also, move some of your weight up front
 

Old&Slow

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Jul 11, 2017
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I was researching props and came across this from Michigan Wheel: [h=4]Will a different propeller correct bad torque action (listing and hard steering)?[/h] Not usually. Most likely it is the result of any of several irregularities in the hull, the steering hook-up or the engine mounting. Steering wheel must be properly located relative to propeller rotation. If an engine has a right hand rotating propeller, steering wheel should be on the right or starboard side. This side normally would tend to lift as the result of torque action and the driver?s weight offsets it. Modern outboards have built-in features in the lower units to compensate for torque. Engine tilt should be such that the prop is horizontal when underway. If it is up or down, the propeller can have a definite pull to one side. See that the engine is at the exact center of the transom and is setting level. Steering linkage should have enough adequate sized pulleys, properly swiveled and with the right cable tension. Check boat bottom for warping, distortion, which could cause difficulty.

I don't see any visible hull issues. I'm going to move weight around and see what effect that has.
 

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
21,864
Your motor does have a swivel tension adjustment.

It is located on the front, under the front lip, just below the top cowl.

Lever moves side to side to adjust.

Is part #3 that puts pressure on part #7 in link below.
Sometimes #7 will break, or one of the bolts will loosen and fall out.

If link does not work, look up mercury parts diagram online, swivel assembly diagram.


http://www.crowleymarine.com/mercury-outboard/parts/368_170.cfm?mdl=CEVUPH
 

Old&Slow

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Joined
Jul 11, 2017
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3
I took the boat out today with the specific purpose of resolving this issue. To make a long story short, moving the trolling motor battery from the front center to aft and to port, moving the fuel tank to port as much as possible (2-1/2 inches) and trimming the motor up one notch resulted in basically neutral steering. The boat is light enough so that in this configuration I can steer it left or right simply by moving to left or right a couple of inches. In any case, it no longer tries to pull my shoulder out of the socket to go straight, so I'm happy with it. Thanks for the thoughts!
 
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