Tachometers, Gear Ratios & Slip

[ezeke]

Since it is impossible to translate engine RPM into prop RPM without knowing the gear ratio, I was wondering if there is a table or chart in the public domain showing those ratios for all or most OMC models. <br /><br />(Failing that, I would appreciate it if someone would let me know where I can steal a look at one).

 

[Dhadley]

Re: Tachometers, Gear Ratios & Slip

There's not that many in use currently. Sales brochures have it listed but if you'll tell us what you have I'm sure we can help.<br /><br />Or you can simply count the turns.

 

[ezeke]

Re: Tachometers, Gear Ratios & Slip

I have OMC service manuals for all of my motors. They list the gear ratios on the specifications sheets. <br /><br />I'm looking for something comprehensive, but thank you for responding.