Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
dannybass, raybass, bassinhuntin, TILLMAN, Fins and Skin
106813 Registered Users
Top Posters
TexDawg 87576
hopalong 78856
Pilothawk 75996
JDavis7873® 67386
John175 � 66203
FattyMcButterpants 60841
Derek 🐝 59308
Tritonman 57851
LoneStarSon® 54035
SkeeterRonnie 53189
facebook
Forum Stats
106813 Members
61 Forums
817745 Topics
10331346 Posts

Max Online: 36273 @ 01/23/13 02:34 PM
Topic Options
#11808300 - 09/01/16 04:26 PM Help trouble shooting Merc Tachometer
tdavis184 Offline
Outdoorsman

Registered: 09/12/06
Posts: 129
Loc: Longview, Tx
1995 Mercury XRi 2.5 Liter 200hp..........Crank engine and tach appears very low in the 300 range. As RPM's rise so does the tach til at about half trottle (just on plane good) the Tach has pegged out at 9000. My plan is to clean connections on rear of Tach and inspect wires for obvious issues. Can anyone tell me how to test grey wire for correct voltage or Resistance? Two new rectifiers/regulators put on last summer. System is charging batteries correctly.
Thanks

Top
#11808308 - 09/01/16 04:32 PM Re: Help trouble shooting Merc Tachometer [Re: tdavis184]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 11328
Loc: Littlefield Tx & Lake A. H. US...
You need to reset the poles on the tach.
The black rotating switch. Many times all one has to do is turn right, then back, then turn left, then back to get connection again.
_________________________
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD

Top
#11808341 - 09/01/16 04:51 PM Re: Help trouble shooting Merc Tachometer [Re: tdavis184]
tdavis184 Offline
Outdoorsman

Registered: 09/12/06
Posts: 129
Loc: Longview, Tx
Thanks Gary..I will try that. I never run boat WOT. Actually very conservative. But I cant stand to have something that is not in correct working order.

Top
#11809076 - 09/02/16 08:36 AM Re: Help trouble shooting Merc Tachometer [Re: tdavis184]
Muzzlebrake Offline
Extreme Angler

Registered: 12/26/14
Posts: 1652
Loc: Euless
FYI, a rectifier going bad or already bad will cause the tach to go crazy or not work at all. Take a look at the rectifier to see if its ever over heated. You will see black tar like stuff running down the outside and maybe some overheated wires that connect to it.
_________________________
From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."

Then He made the earth round...and He laughed and laughed and laughed!


Top



© 1998-2017 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide