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#12752664 - 05/12/18 09:49 AM What Tachometer Ranging Switch Setting?
DaveTV Offline
Outdoorsman

Registered: 03/28/17
Posts: 71
Loc: Plano, Texas
Good morning all. Hoping to find a little help and avoid having the dealership take my boat hostage.

Does anyone know the correct setting for the ranging switch on the back of the tachometer for a Merc 225 Pro XS? The chart says open 2 and 3 for 6 cyl. Also says open 4 for 12 alternator poles. I know the engine is a 6 cyl but believe it is 12 altenator poles as well. Should I set it by engine or alternator poles?

The setting is currently on 2 and the tach is reading too high. It's an 8 position switch. The photo is not mine and an example only.

Thanks in advance for any help.


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#12752800 - 05/12/18 01:23 PM Re: What Tachometer Ranging Switch Setting? [Re: DaveTV]
T Bird Offline
TFF Celebrity

Registered: 03/07/10
Posts: 6152
Loc: Temple, Texas "Rail Town USA"
Try engine first.

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#12752815 - 05/12/18 01:52 PM Re: What Tachometer Ranging Switch Setting? [Re: DaveTV]
DaveTV Offline
Outdoorsman

Registered: 03/28/17
Posts: 71
Loc: Plano, Texas
Will do. Thanks T Bird.

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