bertram31.com

Thanks John, I saw that blue 31 at a boat show a few years ago. My family has a house in Rockport. I appreciate the information. Did you go with 315 yanmars on your bahia mar?

Sam

A 330B with a 1.5 gear propped to 2,900 will turn a 20x24x4 with a med cup. A 370B with a 1.5 gear propped to 3,100 will turn a 20x23x4 with a med cup. Some people like the 370 vs. the 330 because you develop the hp a little higher up the rpm curve. More oil and coolant flow, raw water flow, and pis...

In looking through some past topics I have seen where it is not recommended to exceed 320 HP because at 29 knots the run angle becomes to flat without prop pockets, and the nose will dive. I think most 31's with 315 yanmars hit 32 knots WOT. If you install a 370B (355 bhp) in a bahia mar with a marl...

I do not have one picked out yet. I would like a late 80's Mark III. Part of what I want to do involves adding fuel. I need to increase the 720 to 1,000 gal. I know the spot where the aft water tank is has been used by some for extra fuel or a fish box. I just need some diagrams to see if what I wan...

I don't know if this is the right place or not, but I am looking for some information on 46 Bertram Convertibles. Does anyone know of a site or location where I can get diagrams of fuel and water tanks, layouts, dimensions, etc. I would like to re build a 46, but I need some more technical informati...