View Full Version : 2005 Tach bouncing
hleepert
10-19-2005, 07:07 PM
Wondering if anyone was having a bouncing tach problem on 2005 models. I have an 05 197 and from day one my tach was bouncing at all speeds. I have the MCX upgraded and wondered if it was related to the wired throttle? My dealer tried to adjust it with no success. My sales guy said that every 05 that he has demo has done the same thing. He hasn't heard anything from MC but he thinks they should do a recal.
André
10-19-2005, 07:15 PM
All i can say is that there use to be a long thread on MBO abount bouncing tach and M..... was saying it was normal but the owners were quite mad about it.
First time i read about this on a MC,are they using the same king of gauges ?(MC and M-----)
Ric has a 05 with MCX... :woohoo:
If it was my boat, I would call MC myself and find out if they have a fix for it. If the dealer hasn't checked into the reason for the bouncing, they need to get an earful. OTOH, if a recal can actually fix it, they shouldn't make you wait for it since a recal takes all of 5-10 minutes.
hleepert
10-19-2005, 07:57 PM
I was hoping someone from MC might see the post and give me a response but you are probably right I should contact them direct. I had a typo in my first post. My sales guy thinks that MC should recall not recal. :o Thanks for the input.
Look under the dash for a flat black box, about 7"x10", with a couple of harnesses and 2 tubes going to it. If they're still using the MDC box, it may have the same grounding issues as the original ones, in 1999 and 2000. The dealer should have a test harness, specifically for diagnosing the gauge problems.
bmargol
10-19-2005, 08:39 PM
I just bought a 2005 197 & have not noticed any bouncing tach yet. but boat only has 15 hrs on it.I have noticed cruise control does not hold on the speed setting as well as the rpm setting.
hleepert
10-19-2005, 08:42 PM
Do you have Perfect Pass? If not maybe my problem is related to PP.
BeavenX5
10-19-2005, 08:56 PM
I have a similar problem on my 2000 X5 with the 310HP predator. Tach starts bouncing only at 3000 RPM and above. In your opinion, should I check the ground and the harnes or is the problem more likely with the gauge itself.
I guess any testing would have to be done in the spring as my boat is already winterized. :(
hleepert
10-19-2005, 09:01 PM
The dealter tried adjusting the Tach when I took it in for the 20 hour check up but the adjustment only made the tach bounce softer and wider. I did notice more of a bounce at higher RPM's
crdickey
10-19-2005, 09:42 PM
The dealter tried adjusting the Tach when I took it in for the 20 hour check up but the adjustment only made the tach bounce softer and wider. I did notice more of a bounce at higher RPM's
Your gauges are controled by the MCDC black box under the dash and receive a varible signal which is very sensitive to inadequate system grounding. I was plagued by the same thing with my oil pressure gauge. The dealer and MC were no help at all.
Cured it by disconnecting, cleaning, abraiding the connecting places /posts and reconnecting all the ground wires. Double check anything high voltage for proper grounding, like lights, blowers, bilge pumps, heater fans, stereo's, etc
hleepert
10-19-2005, 09:48 PM
I have it in having some other warranty work being done now and I will have them try your suggestions. Thanks for the help!
I cannot help. at last glance my tach was working properly but now you have me wondering....
We have seen this on a couple 2005's. Each time we went thourgh the tests and found the tach to be bad.
My 2005 197 has had a bouncing tach as well from new. My dealer replaced the module, and updated to the latest program on the computer. It is better, but it still bounces. He said MC didn't know the answer either.
When you say to go back and clean all the grounds, what do you mean, since from what I understand everything grounds back to the battery. Do you mean cleaning all the ground wire connectors on all the pj connectors?
erkoehler
10-21-2005, 12:54 AM
There is a ground that comes off of each electronic gauge. On mine, although a bit older they all ground back to the center gauge being the tach.
Not sure how it is on the new boats though.....
Andyg
10-21-2005, 09:57 AM
If you crawl up under the dash you will see a ground block with several grounds attached to it. It is a metal strip with with about 15 wires connected to it. Based on what MYMC says though it sounds like a bad batch of tachs were used in some boats.
erkoehler
10-21-2005, 12:06 PM
I guess it should be off to the dealer you go....... :)
hleepert
10-21-2005, 01:19 PM
I spoke with the dealer today to give him all of the suggestions. My only problem will be that I won't be able to see if they worked until the spring. Thanks to all for the help.
hleepert
10-28-2005, 05:17 PM
I spoke with the dealer today to give him all of the suggestions. My only problem will be that I won't be able to see if they worked until the spring. Thanks to all for the help.
Picked up the boat from the dealer today and they had no luck in fixing my bouncing tach. They replaced the tach with a new one and still had the same problem. They checked all the grounds and we still have the same problem. They also checked the module with no success. Fortunatly I have PP so I don't rely too much on the analog tach but its still anoying to see it bounce especially on a new boat. I guess I will talk to MC to see if they might be able to do anything for me.
That was pretty much the same route my dealer took, and couldn't solve it. It wasn't for lack of trying though. They also spoke back and forth with mastercraft on the issue with no luck either. When I spoke to mc, they said that they would have the dealer check the main ground block, and the check the grounds w/in the harnesses as well. The bouncy tach is more of an annoyance on such an expensive boat, but I have concern of the ground getting worse and having a larger effect on the system (if thats what's really the problem). Please let us know if you find a solution.