Tachometer question..

[Robs88]

I wanted to know will an I/O tach work on my outboard engine? if so, what do i have to do to make it work.

 

[seabob4]

Re: Tachometer question..

I wanted to know will an I/O tach work on my outboard engine? if so, what do i have to do to make it work.

I/O Tachs go up to 6K RPM. If you know you won't be hitting that, as long as the tach has a setting on the backside for O/B apps, it will work. Farias do.

 

[Robs88]

Re: Tachometer question..

I/O Tachs go up to 6K RPM. If you know you won't be hitting that, as long as the tach has a setting on the backside for O/B apps, it will work. Farias do.

Yes you're correct, its a 6k rpm, and its a faria also do u know what application i need to put it on for my 1997 Merc. 150hp offshore 2 stroke?, On the back the gauge has setting of 1,2,3,4,5,and 6 but its faded so i dont know what number to set mine for..

 

[seabob4]

Re: Tachometer question..

Yes you're correct, its a 6k rpm, and its a faria also do u know what application i need to put it on for my 1997 Merc. 150hp offshore 2 stroke?, On the back the gauge has setting of 1,2,3,4,5,and 6 but its faded so i dont know what number to set mine for..

Rob,
Look on page 3...http://faria-instruments.com/site_manuals/IS0012u.pdf

Don't know if that tach will work...

 

[Robs88]

Re: Tachometer question..

Rob,
Look on page 3...http://faria-instruments.com/site_manuals/IS0012u.pdf

Don't know if that tach will work...

Thanks, Im going to try it tomm, hopefully it will work.

 

[seabob4]

Re: Tachometer question..

Thanks, Im going to try it tomm, hopefully it will work.

Report back on your findings...

 

[Silvertip]

Re: Tachometer question..

Faria says a 6000 RPM tach is for inboard and I/O ONLY. The posters tach has stator settings of 1 through 6. I/O tachs are coil driven not alternator driven. This tach apparently has no number of cylinders setting so although the tach may work, one needs to do some translation that may not correspond to actual tach reading. A four stroke I/O engine fires each cylinder every second rev so a four cylinder engine provides two pulses/rev. A six cylinder provides 3 pulses/rev and an 8 cylinder provides 4 pulses/rev. A stator driven tach typically provides 6 pulses/rev. So using an I/O tach calibrated for an 8 cylinder engine would result in a tach reading that is 2/3 of what a 12 pole alternator (6 pulse/rev) would read. Therefore if the engine was running at 6000 rpm the tach would only be reading 4000. I doubt this is really an I/O tach as it doesn't have a cylinder select switch.