1980 Merc 115 WOT RPM? And speed estimate?

[Chris1956]

Re: 1980 Merc 115 WOT RPM? And speed estimate?

Move the trim rod down one hole at a time until the porpoising stops. The CDIElectronics Web Site has a Troubleshooting Test for your ADI ignition system

 

[kknickelson]

Re: 1980 Merc 115 WOT RPM? And speed estimate?

That whale tale should take care of the porpoising, and help getting on plane faster. ( some hulls are prone to porpoising ) I have only seen a difference of 1 to 2 mph with the tail installed. Not sure why folks are telling you to get rid of it.

Kevin

 

[Chris1956]

Re: 1980 Merc 115 WOT RPM? And speed estimate?

Kevin, The whale tail is an unknown. We do not want unknowns in the diagnosis. In addition, the boat is a 15 footer with a 115HP motor. It should fly with that power. A whale tail cannot be necessary, for his application.

 

[kknickelson]

Re: 1980 Merc 115 WOT RPM? And speed estimate?

Kevin, The whale tail is an unknown. We do not want unknowns in the diagnosis. In addition, the boat is a 15 footer with a 115HP motor. It should fly with that power. A whale tail cannot be necessary, for his application.

Ok ... I'll go along with that. I would use a calibrated shop tach to measure rpm's at wot though.