Another Yamaha trim sensor question

[KW23CC]

I have read several posts on this issue but what I have read does not seem to correlate with what I see with my motor and I would like any clarification/verification. My motor is a 2002 Yamaha SX250TXRA. Just recently my trim gauge has started misreading by indicating my motor is trimmed halfway up when it is fully down. When I put my boat on the boat lift and fully raise the motor, I can locate the spring loaded plastic trim sensor lever and when I manually press down on it, it goes fully down then the spring brings it fully back so it appears to be operating correctly. When I start to lower the engine it appears that the peg at the end of the plastic lever engages with the metal motor bracket which starts to activate the sensor. However, when the motor moves further down from the tilt to the trim position I cannot see if the sensor is still touching the metal bracket. The posts I have read mention a collar that is clamped to the motor tilt shaft but I cannot see this on my motor and the plastic lever seems to be sensing the metal bracket not something clamped to the tilt shaft.
Can someone please clarify for me whether that for my specific motor, there should be a collar that clamps to the tilt shaft which engages with this plastic trim sensor, or is the sensor lever supposed to detect the position of the metal motor bracket as the motor lowers.
Since the trim gauge just seems miscalibrated and just does not detect the fully down position, I would think I am not missing a piece.
Can anybody shed light on this.
Thanks

 

[KW23CC]

Re: Another Yamaha trim sensor question

Update:
When the motor is fully up and I manually push the trim sensor lever fully down with my hand, the trim gauge accurately reads trim fully down. However, when I lower the motor and allow the motor bracket itself to push the sensor lever down, the gauge never reads fully down even though the motor is physically fully down. I have two questions:
1) Is there any calibration capability in the Yamaha gauge itself to allow calibration of the gauge?
2) I assume the sensor is a variable resistor. If so, when the motor is down, does that represent the low resistance end of the scale, such that if there was a bad connection somewhere in the wiring from the sensor to the gauge, the additional resistance would appear to the gauge that the engine was not fully down even though it is.

Any help would be appreciated

Thanks

I have read several posts on this issue but what I have read does not seem to correlate with what I see with my motor and I would like any clarification/verification. My motor is a 2002 Yamaha SX250TXRA. Just recently my trim gauge has started misreading by indicating my motor is trimmed halfway up when it is fully down. When I put my boat on the boat lift and fully raise the motor, I can locate the spring loaded plastic trim sensor lever and when I manually press down on it, it goes fully down then the spring brings it fully back so it appears to be operating correctly. When I start to lower the engine it appears that the peg at the end of the plastic lever engages with the metal motor bracket which starts to activate the sensor. However, when the motor moves further down from the tilt to the trim position I cannot see if the sensor is still touching the metal bracket. The posts I have read mention a collar that is clamped to the motor tilt shaft but I cannot see this on my motor and the plastic lever seems to be sensing the metal bracket not something clamped to the tilt shaft.
Can someone please clarify for me whether that for my specific motor, there should be a collar that clamps to the tilt shaft which engages with this plastic trim sensor, or is the sensor lever supposed to detect the position of the metal motor bracket as the motor lowers.
Since the trim gauge just seems miscalibrated and just does not detect the fully down position, I would think I am not missing a piece.
Can anybody shed light on this.
Thanks

 

[BaileysBoat]

Re: Another Yamaha trim sensor question

No, the gauge can not be calibrated-only the sensor or cam can be adjusted.

Here is a parts diagram:

http://www.**********/parts/search/Yamaha/Outboard/2002/SX250TXRA/BRACKET 1/parts.html

I think you need to look at parts 31 through 40. It seems you do not have the adjustable collar like newer Yamahas.

Let us know what you find.

 

[KW23CC]

Re: Another Yamaha trim sensor question

Thank you for the response.
The link to the parts site is invalid as it appears to contain asterisks.
It is my feeling that my engine does not have an adjustable collar on the tilt shaft as I cannot locate it and the sensor arm seems to be activated by the metal engine bracket.
Since my boat is on a lift and I cannot get squarely behind the motor to be absolutely sure there is no collar on the tilt shaft, and the exploded parts diagrams I have seen online are not that clear, can someone please confirm that my engine year does not have the adjustable collar. If not, is there any adjustment I can make to have the gauge read fully down when the motor is lowered and not read half tilt.
Thanks again for any advice on this.