Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
Thomas101, liprippen, C. Walker, ronws67, Leftridge
102711 Registered Users
Top Posters
TexDawg 82860
hopalong 74385
Pilothawk 73425
JDavis7873® 67377
FattyMcButterpants 60518
John175 ® 59871
Tritonman 56823
Derek 56400
SkeeterRonnie 52453
LoneStarSon® 52219
facebook
Forum Stats
102711 Members
61 Forums
858915 Topics
11267559 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: 128
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 Online   content
TFF Guru

Registered: 05/24/03
Posts: 10519
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” 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: 128
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: 1004
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.
_________________________
Infidel and proud of 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



© 1998-2016 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide