bertram31.com

gcreas1

No thankfully it has been back in the water for a while. Just doing a few odds and ends and hoping fishing breaks out...

gcreas1

Thanks much for the info.

gcreas1

Have a B31 with stock 454's was wondering what the manufacturer and model number is for the transmission? Have been told they are Borg Warner?

Thanks

gcreas1

Much thanks for all the info, will check with an IR temp meter, but checking ground on gauge might be a good place to start.

gcreas1

Thanks, since the meter is bouncing all the way up as soon as it starts I'm thinking maybe something is wired incorrectly on the meter side. There appears to be plenty of raw water being pumped through and the exhaust feels cool to the touch at the risers. Pulled the thermostat out just to make sure...

gcreas1

Have a new engine in my B31, cooling system plumbed with FWC cooled manifolds and raw water cooled risers. What should be the expected normal operating temperature? At idle after warm up the meter is sitting at a little over 220 degrees. My old raw water cooled engine would run around 160 degrees, p...

gcreas1

Thanks much, your experience echoes my concern about the difference in operating temperature. Since the engine was already plumbed for FWC manifolds I have decided to at least set it up initially that way and run it for a while to see how it performs. Easy enough to convert it back to raw water if I...

gcreas1

Thank you!

gcreas1

Thanks to all I am convinced that FWC the manifolds is the way to go. One more plumbing issue, the boat I believe has the original Y where the two exhaust lines come together. It looks really rusty and corroded from the outside but seems solid all the way around. Since that Y sits below the water li...

gcreas1

Much Thanks

gcreas1

I have completed my engine swap on my B31. Thanks to all who responded, Information was quite helpful. Now I'm trying to decide how I want to plumb the exhaust and coolant ines on my replacement engine. Original engine was raw water cooled all the way, never had an issue just flushed when I came bac...

gcreas1

Just went through this issue and it was the port side counter rotation.

gcreas1

Great another west coast B31, I'm on mooring H62 right off the Legion. You still on gas or running diesels ?

gcreas1

Thanks will do.

gcreas1

Thanks much for the info, haven't seen many west coast guys on this site.

gcreas1

Do the actual model number for these BW transmissions?

Thanks

gcreas1

thanks, you probably had the deck plates lifted? Engine and trans out together?

gcreas1

That is a big help, Thanks much

gcreas1

Thanks much enjoyed the video, wish I was dropping in a pair of diesels.........

gcreas1

Thank you!!

gcreas1

Thanks

I have the engine part of the project sorted out, my problem is I don't know which transmission came off which engine. Does anyone know if they are interchangeable? This the original,
I believe Borg Warner is the manufacturer.

Thanks

gcreas1

Thanks Patrick I know you know Bertram better than anybody but I'm pretty sure one engine does counter rotate. I have a 78 with the original Merc big blocks, I know there is a different firing order on each engine and just to make sure I went to the garage and hand spun both transmissions clockwise ...

gcreas1

Thanks I was debating to pull both engine and trans at the same time, sounds like that might be best.

gcreas1

Thanks, my problem is finding a lift apparatus that would work like a fork lift while boat is sitting in the water, area options are more like a chain pulley from above. Looks like I can gain a few inches if we release the trans mounts and slide it back towards the stern, not sure if that will buy m...

gcreas1

I'm in the process of swapping out a Mecruiser 454 in my B31 and would like some advice on best method of doing this while the boat is sitting in the water. Looks like we can, block the back of the engine, unbolt the bell housing and slide the engine forward while it is lifted, problem looks like th...

gcreas1

I have a 78 B31 with Mercruiser 454's, I have a spare set of engines and transmissions that came with the boat. I know the port engine is counter rotation, what I'm not sure of is, are the transmissions specific to the rotation of the engine, or do they not care which side they run on? I want to use...

gcreas1

Thanks to all for the information, the more I read, the better my current rub rail looks. It might be on my to do list for a while.

gcreas1

Anyone out there have experience replacing the original rub rail on a B31? I have seen some units available on line, look like PVC replacements for the original aluminum unit. Have looked up in the bow and the fasteners are not screws but bolts with nuts on the interior. Can imagine if same entire l...

gcreas1

Thanks much

gcreas1

Coming out of my exhaust manifolds I have hose going to two fiberglass elbows that then run to a combining pipe that ties both exhaust lines together before it hits the muffler. That combining piece appears to be constructed out of iron. Question, does anyone know if they make a fiberglass replaceme...

gcreas1

Thanks for confirming my worst fears, at least I have enough time to get it pulled up before my tank is cut out.

Gary

gcreas1

I hope someone has experience pulling up the center panel from a B31 cockpit floor. I am hoping there is some way to get access to the fuel tank without completely dismantling the entire cockpit. It looks like the center panel has a lip that rests under the starboard and port panels. Is there some w...

gcreas1

Hey Guys

Has anyone done a tank replacement for a B31 on the left coast, preferably in So Cal? All of the resources I have come across are on the East Coast and I would like to deal with someone local to get the job done.

Thanks Much

gcreas1

The Boat is in Newport Beach, it is a 78 31 FBC with a Tuna tower. It has been under used for several years but seems to be in good shape. I'm used to doing most of my own work on 350 Crusaders so 454 Mercs are somewhat foreign but things are coming around. Dealing with old gas and a cranky Onan gen...

gcreas1

Thanks much for the input, I don't have the resources to repower
Right now so will go with the new tank.

Thanks

gcreas1

Hello New to the forum, new proud owner of a 78' B31 with gas engines. The boat has been sitting for a while, 3-4 years. Has never had ethanol laced gas in the tanks or run through the engines. The boat still has the original fiber glass tanks which look visual pretty clean internally with no exteri...

bertram31.com

Search found 36 matches

Re: B-31 Transmission

Re: B-31 Transmission

B-31 Transmission

Re: Normal temperature on a 454 mercruiser

Re: Normal temperature on a 454 mercruiser

Normal temperature on a 454 mercruiser

Re: Engine plumbing

Re: Engine plumbing

Re: Engine plumbing

Re: Engine plumbing

Engine plumbing

Re: What side is counter rotating engine usually on

Re: Engine swap on B31

Re: Engine swap on B31

Re: Engine swap on B31

Re: B31 transmission

Re: Engine swap on B31

Re: B31 transmission

Re: Engine swap on B31

Re: B31 transmission

Re: B31 transmission

Re: B31 transmission

Re: Engine swap on B31

Re: Engine swap on B31

Engine swap on B31

B31 transmission

B31 rub rail

B31 rub rail

exhaust for a B31 with gas 454's

Fiber glass decks

Cockpit flooring

West coast tank resource

1978 B31