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16' boat, 25 hp motor. Pulls to the right real hard. Have already turned the trim tab to the right, when looking at the back of the boat. Are there any torque tabs that really work? Would a 4 blade compprop help? Would a doel-phin help? No problem getting on plane. Thanks in advance for any help.
Try trimming the motor out a little. Is the problem worse when you hit it or while you are on plane?
try turnning the trim tab to the left.
If I am reading your post correctly you are turning the trim tab in the wrong direction. Learn to use the terms port and starboard then there is never any question about how you are looking at the boat. Since it is pulling to starboard adjust the trailing end of the trim tab to starboard. It usually only takes a little bit. Maybe 1/4 to 1/2 inch. If you are sure all that is good check the motor installation. Is it mounted vertical and in the middle of the transom? Is the anti-cavitation plate even with the bottom of the boat? And like mentioned try different trim positions.
catfan, I will try trimming the motor. It is worse while on plane. How will that help?
papasage, already did that.
barnaclebill, sorry for the confusion, pulling starboard, have adjusted all ways at different times. I will check some measurements also. What does the PTC in front of USN stand for? My sister retired last year from navy, dad did a tour in nam w/ air force, i did four year w/army.
Thank you all for the response. I am truly impressed by the members on this site.
is this a tiller stering or a stick . unbalanced load could be the probablem .usealey torque probablem in on take off . had a 50 hp on a bomber 15 ft . had to let off of the throdle on take off to turn left and on plane ran streight with the trim tab turned all the way . a dolphin fin may help and you can git trim tabs for it to add mor trim to it .
Man do like Barnacle Bill said and turn the trim tab to the left looking at the back of the boat and it will not pull to the right.
Sounds to me like the motor isnt centered. If the motor is mounted with clamps mark where it currently is and slide the motor over just a tad and try it again.
Im sure if it pulls right move tab to right.Quote:
Originally Posted by Kissimmee Kowboy
My thought also. Measure the center of the bottom of the transom and make sure the center of the motor is aligned. Let us know what you find.Quote:
Originally Posted by gabowman
Copied this from another site.......
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Turn tab in direction boat is pulling.
TRIM TAB ADJUSTMENT
On larger Outboard motors, there is a steering trim tab located on the bottom of the cavitation plate, just aft of the propeller. It is adjustable and has been installed on the engine to correct for propeller torque.
Adjustment of the trim tab should be done after you've gone through the steps of proper tilt adjustment.
The boat should be operated with a normal load on board in a straight line. Incorrect trim tab adjustment will cause the boat to turn to the left or to the right when your hand are removed from the steering wheel. Be careful when removing your hands from the steering wheel; a tilt tab incorrectly positioned may cause the boat to turn violently.
To adjust the trim tab, loosen the securing bolts, as per the engine manufacturer's instructions, and move the trim tab in the direction the boat pulls. For example, if the boat pulls to starboard, move the trailing edge of the trim tab to starboard. Make these adjustments in small increments and test the results. The object is to create a "hands off straight line" steering condition for the normal operating speed. It is not possible to eliminate steering pull throughout the engine speed range.
Remember, tilt adjustment may affect steering torque as much as the trim tab. With Outboard engines equipped with power trim this becomes particularly important. When under way, experiment with trim settings to neutralize steering pull
Just had enother thought......if this is an aluminum boat ...is the keel straight?
I measured and the motor was aligned, looked at the trim tab again it was in the center. Obviously didn't get it tight before. Turned it starboard, doesnot pull near as hard now. Thanks to all for the input.
Forgot to answer woodducks Q. Doubtfull that the keel is straight, this is the cities boat. Used to be the fire dept's boat now shared by us (water plant) and parks. this boat has been abused hard.