I have a 2003 Yamaha F90TLR. While the following info is about my motor, the info is applicable to many different models that use this common part.
I completed the installation of my new Yamaha digital tachometer. During testing I realized the trim indicator was not working and the bars on the meter were all the way to the top. I found two problems. First, the sender (item #1) was stuck and second the little trim sender cam bracket (item #5) was broken. This is a plastic part and apparently has a history of breaking. It is sort of made like a plastic hose clamp with a tang facing the rear of the engine. The tang/cam just sticks out there and the sender arm make contact with it and as you lower/raise the engine, it causes the sender arm to rotate, changing the signal to the meter as the motor position changes.
There is a new all metal replacement part for item #5: YP-99999-03830-00
The stuck sender just needed to be moved a little and I added a little oil where the shaft entered the sensor body. I rotated it several times till it loosened up.
However, this is what I did to repair the broken plastic part. I cut the clamp off both sides of the tang and did a little trimming. So basically the rounded inner surface remained intact. I took a wide stainless steel hose clamp and using my Dremel Tool I cut out a square hole in the clamp. Once I got the size right, I was able to slip the plastic tang/cam piece through the hole (from the inside out). I installed the hose clamp on the round tilt tube (the same place the original clamp was located) and lightly tightened it. I was still able to rotate it with a little pressure. I rotated it aft and then lowered the motor, checking for clearance. Once the motor was all the way down, I rotated the clamp forward against the sender arm and continued until my tilt meter only showed one bar. I then tightened the clamp. Job done!
I completed the installation of my new Yamaha digital tachometer. During testing I realized the trim indicator was not working and the bars on the meter were all the way to the top. I found two problems. First, the sender (item #1) was stuck and second the little trim sender cam bracket (item #5) was broken. This is a plastic part and apparently has a history of breaking. It is sort of made like a plastic hose clamp with a tang facing the rear of the engine. The tang/cam just sticks out there and the sender arm make contact with it and as you lower/raise the engine, it causes the sender arm to rotate, changing the signal to the meter as the motor position changes.
There is a new all metal replacement part for item #5: YP-99999-03830-00
The stuck sender just needed to be moved a little and I added a little oil where the shaft entered the sensor body. I rotated it several times till it loosened up.
However, this is what I did to repair the broken plastic part. I cut the clamp off both sides of the tang and did a little trimming. So basically the rounded inner surface remained intact. I took a wide stainless steel hose clamp and using my Dremel Tool I cut out a square hole in the clamp. Once I got the size right, I was able to slip the plastic tang/cam piece through the hole (from the inside out). I installed the hose clamp on the round tilt tube (the same place the original clamp was located) and lightly tightened it. I was still able to rotate it with a little pressure. I rotated it aft and then lowered the motor, checking for clearance. Once the motor was all the way down, I rotated the clamp forward against the sender arm and continued until my tilt meter only showed one bar. I then tightened the clamp. Job done!
