Gaffrig tach wiring ?

[gorillapowered]

Got a used Gaffrig monster Tach that I installed. The back of the gauge has red/ ign, blk/grd, grn/sender, wht/ light, then 2 looped wires. The sticker says for a 6 cy snip the brown wire. I have it hooked up to a 2.5 outboard. The RPMs are way wrong!! The old gauge worked with the engine and wireing... So, is there something I did worng with this monster tach wireing or is the tach just junk???? Its acting like its set for a four stroke, but I see no way to change anything no prob settings

Thanks for any help,
Dan

[obrien]

did you already cut the wire? You don't setup a 2 stroke outboard the same as a 4 stroke v6. you should set it up for 12 pole.

[mlb75]

Saw same thing with my Livorsi tach's, they used dip switches, but I had to set it to "12 cylinder" for them to read correctly for my 300xs's...

Hope that helps

[Lumaguma]

Got a used Gaffrig monster Tach that I installed. The back of the gauge has red/ ign, blk/grd, grn/sender, wht/ light, then 2 looped wires. The sticker says for a 6 cy snip the brown wire. I have it hooked up to a 2.5 outboard. The RPMs are way wrong!! The old gauge worked with the engine and wireing... So, is there something I did worng with this monster tach wireing or is the tach just junk???? Its acting like its set for a four stroke, but I see no way to change anything no prob settings

Thanks for any help,
Dan

how did you do to work perfectly? I got the same problem but I don’t find how set it up right ! Twin 300X

[buddy stewart]

6 pole setting worked on my Stewart Warner Gauge on my 2.5 has dip switches.