Yamaha Multi-Function Digital Tach question

[dpfundst]

Hi,<br />I have a 2001 90HP 2 stroke 90TLRZ with the multi-function digital tach. I am new to Yamaha.<br /><br />I ran the boat this weekend and it ran great, but on the Tach - the reading is a single blinking bar on the temp, nothing on oil, nothing on tilt. I am getting RPM readings, but I'm not sure they are correct.<br />There is plenty of water coming out of the "pee hole", the oil is full, and I used various levels of tilt/trim during the day out. <br /><br />I appreciate your help,<br />Thanks<br />Dwight

 

[rodbolt]

Re: Yamaha Multi-Function Digital Tach question

you should have bars for the tilt, no bars for the temp and a set or bars to indicate full oil.<br /> if someone has changed tachs its possible the switch settings are inccorect.<br /> could also be the trim sender is stuck. <br /> may be time to have a dealer look at it, unless thats where ya got it.<br />can ya post a digital picture of the tach?

 

[dpfundst]

Re: Yamaha Multi-Function Digital Tach question

I bought the boat in a private sale.<br />It was repowered in 2001 supposedly by a local boat marina.<br /><br />I did run the boat in Nov. when I bought it. but didnt know anthing about the tach, and didnt pay attention to it.<br /><br />I read up on it a bit, on the Yamaha web site, and thus I sent this after going out this weekend.<br />The boat is in my yard. I will attach rabbit ears, run it, and take a picture of the tach.<br /><br />Thank you<br />Dwight

 

[dpfundst]

Re: Yamaha Multi-Function Digital Tach question

I just ran the engine at idle with rabbit ears,, and took pictures of the tach.<br />The tach did what appeared to be a system check, displayed an "88", a full bar for tilt, a single bar for heat, and a single bar for oil.<br />Then this cleared, the temp blinked on and off, the oil was blank, and the tilt stayed at 2 bars.<br />Water flowed through the pee hole at idle.<br />I have digital pix I will post.<br /><br />Thanks<br />Dwight

 

[dpfundst]

Re: Yamaha Multi-Function Digital Tach question

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[rodbolt]

Re: Yamaha Multi-Function Digital Tach question

tell tale has absolutly nothing to do with tach function, check the dip switches.<br /> does that tach have a mode and set button on the front ?<br /> they are to blurry for me to tell.<br /> to the trim bars move up and down as the engine is tilted ?<br /> all the segments will self test at key on.<br /> if set up correctly the tach oil should display 3 bars if the oil tank is over 1/3 full.<br /> the temp should have no display until the overheat is triggered.<br /> if the tach dip switches are set for 4 stroke the display will be inccorect. the 99 and older tachs had arrows and way way old just lights.<br /> should be sw1 on,sw2 off, sw3 on.<br /> sw1 selects two or 3 wire trim sender on is for a two wire sender, sw2 is for tach pulse selectionoff is for the 90's 12 pole altenator, sw3 is for 2 or 4 stroke select. if your tach is a 2000 or later you will see a small rubber plug on the back, the switches are under that plug.<br />sometime in the early 2000's all the tachs came shipped with the switches set for 2 wire,12pole and 4 stroke, if they are not reset as needed at installation they wont work correctly.

 

[dpfundst]

Re: Yamaha Multi-Function Digital Tach question

Thank you, I will check the dip switch settings.<br /><br />It sounds like it is set for a 4 stroke<br /><br />I have a 2001 2 stroke 90hp

 

[rodbolt]

Re: Yamaha Multi-Function Digital Tach question

I know the motor year, what year was the tach manufactured.<br /> if it has a mode select function its after o4 and may need an adapter.<br /> by your model I can also tell its electric start with trim,20" transom and remote control.<br /> what I cannot tell is the tach year.<br /> do the trim bars move when the engine is tilted ?

 

[dpfundst]

Re: Yamaha Multi-Function Digital Tach question

The tach bars do not move when the trim is tilted.<br /><br />I will look at the tach tomorrow to check if it has a Mode button<br /><br />The boat was repowered with this tach in 2001<br /><br />Thanks again<br />Dwight

 

[dpfundst]

Re: Yamaha Multi-Function Digital Tach question

I just went out and checked the tach<br /><br />There is NOT a Set or Mode button on this tach<br />It must be little "older" <br /><br />I apologize for lack of details. The guy I bought this from did not keep/have any manuals or documentation<br /><br />Thanks again<br />Dwight

 

[rodbolt]

Re: Yamaha Multi-Function Digital Tach question

no worries, but by having bars it has switches.<br /> sometimes you have to move them and reset them.<br /> tilt the motor all the way up and see if the sender arm is moving freely.<br />its the arm on the inside of the port bracket, could be stbd but memory says port.

 

[dpfundst]

Re: Yamaha Multi-Function Digital Tach question

Hi,<br /><br />Just came from giving this a try.<br /><br />The plug was exactly where you said, as well as the dip switches. That's the good news. The bad news is I had to use a mirror to see the switches because the access is so tight under the console. It was hard to make out which one was which. I tried using the mirror, a light, and a sharpened pencil to change the switches, but how do these set? Do they slide, push in, up.<br />I am familiar with dip switches on a computer board, but I've never had to get access to ones up inside a "hole".<br />I loosened the bracket the tac is mounted with, and spun it around so I could get a little closer, but I felt like I was doing "<br />brain surget" with a light and mirror and some sort of instrument to re-set the switch.<br />I barely could put the plug back in.<br />Any tips on how to make this any easier??<br /><br />Thanks much<br />Dwight

 

[rodbolt]

Re: Yamaha Multi-Function Digital Tach question

sometimes I have to remove the tach for access. its the same dip switches the computer boards use.<br /> I use an ice pick or my small dental pick to move them as a pencil just does not fit.<br /> did ya tilt the engine up and insure the sender arm is moving freely ?<br />they will stick occasionally.

 

[bossee]

Re: Yamaha Multi-Function Digital Tach question

dpfundst,<br /><br />You can view and download an Owners Manual in PDF on Yamaha US website:<br /><br /> Link <br /><br />You can not print that PDF file I belive but at least You can read it on screen.<br /><br />/Bo

 

[dpfundst]

Re: Yamaha Multi-Function Digital Tach question

Thanks Rodbolt,<br /><br />I will check the sender arm again. Any tips on removing the TACH?<br /> I have an Owners Manual, but I have a Service Manual in transit to me<br /><br />The Owners manual does not have enough detail on the tach<br /><br />Thanks<br />Dwight

 

[rodbolt]

Re: Yamaha Multi-Function Digital Tach question

unplug the connectors,remove the two 7mm nuts and withdraw it from the dash. if you have enough slack in the harness dont even unplug it.<br />its all color coded and plug and play, unless the flying monkeys got it.

 

[dpfundst]

Re: Yamaha Multi-Function Digital Tach question

Thanks Rodbolt<br /><br />I will keep you posted<br /><br />Dwight

 

[dpfundst]

Re: Yamaha Multi-Function Digital Tach question

Thanks Rodbolt<br /><br />I will keep you posted<br /><br />Dwight

 

[dpfundst]

Re: Yamaha Multi-Function Digital Tach question

Thanks Rodbolt,<br /><br />As instructed, I removed the two 7mm nuts and pulled the tach from the dash. I had enough slack in the harness so I didn't unplug it.<br /><br />Much easier to get to the switches. I made the changes, tested, and it's working properly.<br /><br />I just find it unbelievable that the previous owner, ( I just bought this boat) after spending the money for a new 90hp Yamaha, 704 Control and the Multi-Funct. Tach never did anything about the tach not working correctly. He just drove around for four years with it wrong. Unbelievable.