What tachometer

[swimmin' for shore]

I have a 40 hp mercury, 1979. The serial number is 5483300. Can anyone tell me, or paste a link, with which tacometer to buy, and where I can buy it? Thanks. SFS.

 

[Barnacle_Bill]

Re: What tachometer

I use one of these. http://www.iboats.com/Tachometer_7K...1191846--**********.080204215--view_id.169240