bertram31.com

I believe they are the shark's fin style. They are curved at the top near the post.

Still have them. Will scrap out if no one wants them.

Have two original rudders for sale from a 1970 Sportfisherman

I am upgrading the electrical system on a 1970 Bertram 31 Sportfisherman. It has 502 gas big block engines with 100 amp alternators. I moved the starting batteries to center bilge area which are Optima 34M 800 cold cranking amps AGM batteries. The starting batteries have a 10 amp 3 stage charger for...

Chuck, Do you have more information on your setup? trans ratio, prop pitch x diameter, measured fuel burn? My goal is a reliable, 24-knot cruise, at 1mpg. My goal this winter is to get the old 454s back into shape with fuel monitors, and see how attainable that may be. I miss stated the WOT speed -...

I just purchased a 1970 Bertram 31 Sportfish this spring that had new old stock Mercruiser carbureted 502 Magnum engines (black motors) installed in 2016. Supposedly rated at 400-420 HP. It is currently over propped as I only get 4250 rpm at WOT at 47 mph. Buying new props this winter to bring the W...

Received quotes from Haggerty, American Modern, Progressive and Geico(Boat US). Went with Geico, agreed value policy under $900 - covers US waters and Great Lakes. (Bahamas is extra)
Thanks for all the input.

I have Allstate for everything else but they wont insure a boat over 35 years old.

Home port is Anchor Bay - Lake St. Clair Michigan

New owner of a 1970 Bertram 31 Sport Fish and am looking for insurance company options. What do others use? I have quotes from Boat US and Haggerty.
I will have a lot of questions in the near future once I get the boat shipped home.

Thanks,

Charlie