bertram31.com

No, she is the Gypsy Dorothy, sea foam green sides, berthed by peanut island

update: solved the mismatched engine speed problem. bought a handheld laser tach. it shows that the port tach is quite accurate but the starboard was off by almost 10%. so when stbd said 4200 rpms, its was actually 3780. So, now that i was unafraid to run the stbd at WOT, i got 3780 on port and 3960...

Took her out today for just an hour. The problem of Port engine overheating has been solved (new raw water hoses from hull strainers to raw water pumps and strainers sandblasted and painted). 27 kts at WOT with stbd tach reading 4200 and port reading 3600 (rated max is 3800, I think). Clean bottom, ...

Another update: I’ve got her in the yard at Seminole Marine in Palm Beach Gardens; FL. Bigger rudders and new port shaft by Bobby Soles (shaft damaged from mis-alignment, Yacht Tech says), all seacocks serviced or replaced, bottom soda blasted, chips and blisters filled and hard painted, raw water h...

Thanks guys. This is great news because Bobby Soles’ place is in W. Palm Beach and I’m in Florida. I really appreciate the help.

Update: Sea trial last Friday. The former owner didn’t actually know the boat’s performance numbers too well. It turns out that she does 17 kts at 3200 rpm and 25 kts at WOT. Bottom was clean and fuel tank full. These are far better numbers and I was very pleased and bought the boat. Sailed her abou...

Don’t know if this old post is still active but I’m looking for replacement rudders for a’72 B31 I just bought. I called the number Capt. Patrick has on the this site, but it doesn’t ring. Disconnected? does anyone know if they are still available?

very helpful. WOT is 3800-3900, correct? If she won’t spin that high then she’s over propped (if bottom is clean and 2/3 full of fuel, and not overloaded with people and gear)?

Thanks Bruce Yes, you’re right, they are rated at 197 hp. The seller said 16 mph, which would be only 13.9 kts. Maybe he meant to say kts, but if the boat is doing only 16 kts, then 15 gph seems even more out of line. Doesn’t anyone out there have 41’s or know someone with 41’s and could tell me the...

I’m looking at a 1972 Bertram 31 Sport Fisherman that was re-powered with 1989 Volvo Penta TAMDA41A engines. They now have 1800 hours. I’m concerned that something is wrong performance-wise. The seller reports that with a clean bottom it cruises at 3200 rpm running at 16 mph (his term, not mine) and...