Adding or temporary tach

[Wildlifedesigner]

I need to figure out what rpms I am running in the water, so I can get a prop with the right pitch. should I add a tach permanetly? or is there I can get the RPM reading with some type of tool? thanks Bryan

 

[marinegrh]

Re: Adding or temporary tach

adding a tach is a great idea, not only for propping, but for diagnostics when you have problems,

 

[briannh1234]

Re: Adding or temporary tach

I have a friend who is a normal automotive mechanic. We tried his tach one day on my motor. (79 140HP merc.) The thing was good till 10,000 rpm. Sounded good enough..<br /><br />Not. We got out on the water and were soon doing in excess of 10,000 rpm. His tach was designed for 4 stroke engines and this one is a 2 stroke.<br /><br />A Tach can be a wonderfull device to have permenently installed. It is one of the more expensive gages though. I have wondered if a generic tach from an auto part's store could be made to work .. If so it would save some cash.<br /><br />Good luck and let us know (or let me know) how it works out. (I still have no tach, but will need one soon myself.)<br /><br />- Brian