1981 ocean alexander 43

[rteichelII]

Brand new to this site. Also new to trawlers. Have been a power boater for over 50 years. Currently own a 1973 Post 40 convertible as well as the new purchase of the Ocean Alexander. Need to find original specs on prop size, etc. She is a 43' aft cabin with a single Lehman 120 hp. Current prop(when purchased) is a 28x20 three blade. I have not launched yet so I have no idea of the cruise speed, etc. Any and all info regarding the right propeller would would be appreciated. : Thanks.

 

[LaBomba]

No information on your Ocean but welcome to the forum

 

[Comodave]

Welcome also, someone will chime in with some info.

 

[SaltyDawg86]

... the new purchase of the Ocean Alexander. Need to find original specs on prop size, etc. She is a 43' aft cabin with a single Lehman 120 hp. Current prop(when purchased) is a 28x20 three blade. I have not launched yet so I have no idea of the cruise speed, etc. Any and all info regarding the right propeller would would be appreciated. : Thanks.

Said boat would not be in Chesapeake, Va. would it?

 

[sunchaser]

For prop size, go to the calculator at boatdiesel.com - weight is important to know. Can your yard weigh the vessel on the slings? With a single Lehman on your (how) heavy vessel you don't want it over propped.

Does previous owner have any speed vs RPM data? During sea trial was a max RPM test done, both in neutral and while underway? Any over heating show up? Last but not least, verify RPM accuracy with a photo tach.

 

[RT Firefly]

Greetings,
Welcome abaad.