Yamaha 115tlr trim sensor replacement

[Orwell boy]

Hi all looking for a little knowledge re the above
trim sensor failed on my 115 so needed to replace
Yam price was £282 .00 which i felt was a bit extreme
Decided to go for a 2nd hand unit 67h-83672-01-00 from canada which i bought and fitted all ok ,i think ........now the question ?

With the yamaha round smart gauge the indication from the sensor shows 10 lcd nuggets up the right hand side , with 1 showing fully trimmed in and 10 trimmed out ......... can anybody tell me what 10 nuggets represents as my span seems a little small ........Trim in i have 112 mm from front edge of engine to transom (1 nugget reading ) trim out to 10 nuggets and i have 158mm to front edge ...............indication is accurate within span of gauge but i would have expected a greater span as i think 158mm is a long way from cavitation
Is this normal or have i bought a pup ? any help appreciated thankyou

[neil.mccrirrick]

No idea re yam but I seem to remember you have to calibrate on a Mercury so perhaps the same? If memory serves you trim in and set half way and set then all out

[A1an]

Have you run the boat in the water since fitting trim sensor?

[gpsguru]

Originally Posted by Orwell boy

Hi all looking for a little knowledge re the above
trim sensor failed on my 115 so needed to replace
Yam price was £282 .00 which i felt was a bit extreme
Decided to go for a 2nd hand unit 67h-83672-01-00 from canada which i bought and fitted all ok ,i think ........now the question ?

With the yamaha round smart gauge the indication from the sensor shows 10 lcd nuggets up the right hand side , with 1 showing fully trimmed in and 10 trimmed out ......... can anybody tell me what 10 nuggets represents as my span seems a little small ........Trim in i have 112 mm from front edge of engine to transom (1 nugget reading ) trim out to 10 nuggets and i have 158mm to front edge ...............indication is accurate within span of gauge but i would have expected a greater span as i think 158mm is a long way from cavitation
Is this normal or have i bought a pup ? any help appreciated thankyou

A a rule of thumb with trim / tilt, the 1st 10% of the total movement represents the trim.

[Orwell boy]

Thanks people ,a few thoughts there ,thankyou
I have revisited today
Measured my full scale output of the sender and got from 0 to 700 ohms linear
Used a decade box to apply the resistance to the command link indicator to find that 200 ohms = 13 bars /nuggets fso (i did think 10 but actually 13 )
Read a post on hull truth forum that suggested the fso should be 300 ohms
I have noted that some standard trim gauges operate on 0 to 190 ohms which would agree with my decade box inputs ,
i am not sure if i have bought faulty or been sent a working 700 ohm unit for a different yamaha , i have messaged the seller !
maybe i should have bit the bullet with the £282

[Orwell boy]

Originally Posted by A1an

Have you run the boat in the water since fitting trim sensor?

Used the boat a couple of times since fitting new sensor ,must confess ,trimming is not my best skill ,but do think that trimming out is a feel "thing" so actually the way the unit is reading is not the end of the world for me ,after you have been moving faster and slowed it is indication i need to see to trim in ,as this is when you get caught out accelerating while still trimmed out !

[Orwell boy]

Originally Posted by gpsguru

A a rule of thumb with trim / tilt, the 1st 10% of the total movement represents the trim.

My understanding is the trim gauge only shows while trimming ,Tilt is not monitored except by the eye

[Orwell boy]

Originally Posted by neil.mccrirrick

No idea re yam but I seem to remember you have to calibrate on a Mercury so perhaps the same? If memory serves you trim in and set half way and set then all out

Thanks N ,you sent me to the manual and sure enough there is a re zero ing function ,which i did perform ,but i think as my sender has no zero offset this has done little ,i havnt spotted any adjustment possibilities for re spanning however this would fix if i could lower my 700 ohms to 200/300

[charliee]

on my yam 150 1 bar is all the way down and 10 bars are shown just before the engine goes into fast tilt mode - at 10 the engine is still retained by the forks on the mounting bracket (if that makes any sense)