1986 Frontier 25 Twin 150-HP
Posted: Fri Jul 17, 2020 3:01 pm
On a 1986 FRONTIER 25 there are twin Evinrude E-TEC 150-HP engines.
At 4,100-RPM engine speed the boat speed is 34-MPH.
At full throttle the engines accelerate to 5,400-RPM and the boat speed is 48-MPH.
The propellers have 17-pitch.
I don't have enough time yet for data on fuel burn at cruise. The boat has logged about 64-miles.
The route was depart Homer, pass Seldovia, on to Tutka Bay, and back to Homer.
ASIDE: I had a problem with one vapor separating tank at the fitting where the cooling [water] tube enters the [VST] housing. The O-ring seals are important to maintain. If they leak the VST will pull [in] air and water [to mix with the fuel]. [If that occurs after] the engine stalls under load, to restart will be hard.
At 4,100-RPM engine speed the boat speed is 34-MPH.
At full throttle the engines accelerate to 5,400-RPM and the boat speed is 48-MPH.
The propellers have 17-pitch.
I don't have enough time yet for data on fuel burn at cruise. The boat has logged about 64-miles.
The route was depart Homer, pass Seldovia, on to Tutka Bay, and back to Homer.
ASIDE: I had a problem with one vapor separating tank at the fitting where the cooling [water] tube enters the [VST] housing. The O-ring seals are important to maintain. If they leak the VST will pull [in] air and water [to mix with the fuel]. [If that occurs after] the engine stalls under load, to restart will be hard.