New to me 50, Steel full displacement, engine questions

[Obie]

I will check it out, thanks.

[FF]

"It has a clutch so it can be disconnected."

Disconnect the mechanical steering and mount the emergency tiller.

If the steering load is low an electric ram style autopilot will be fast to install, and have a great response time using the jog lever while docking.

About 1/10 the cost and complexity and maint of the hyd stuff.

[Wxx3]

Originally Posted by Obie

So the Florence A is coming along nicely. I am in the final stages of putting in a hydronic heat system. And have almost finished the installation of a JD 4300 motor.
I am just beginning to look into Autopilot’s. I want to h@ve joystick steaming, with autopilot. Right now the boat is Machanicly steered, with a few large gear boxes, and a shaft. It has a clutch so it can be disconnected.
I am looking for a hydraulic reversing pump large enough to do the job, and heavy enough to last for years. I plan on building a bracket on the rudder shaft and use 2 standers hydraulic cylinders. I want to use mostly parts I can pick up at a local store anywhere.
Any ideas would be greatly participated. I was considering using a clutch pump off the motor, with a directional valve. But would prefer a system that can have small inputs, not just on or off.
Obie

Look at ComNav a Vancouver BC company that does a lot of commercial APs, as well as the one on Dauntless. With an Octopus reversing pump. I LOVE them both.
In fact, i should ask for a sponsorship.

[Mule]

Originally Posted by FF

"It has a clutch so it can be disconnected."

Disconnect the mechanical steering and mount the emergency tiller.

If the steering load is low an electric ram style autopilot will be fast to install, and have a great response time using the jog lever while docking.

About 1/10 the cost and complexity and maint of the hyd stuff.

Do you have any additional info on this. Mfgrs, website what ever. Thanks

[Xsbank]

I also have a ComNav and it works great.

Did you ever sort the hydraulics? Those piston pumps are complex and apparently they are tested by measuring the flow from the bypass. I am getting a lot of heat while my engine is running and think that my pump is past its sell-by. It is a Cessna pump and I'm currently looking for a replacement.

[Mule]

Originally Posted by Mule

Do you have any additional info on this. Mfgrs, website what ever. Thanks

I found it anyway. Thanks

[Obie]

I believe my pump is a rotary. And yes I got my hydrolics sorted out. It was just a valve issue. I believe my bow thruster dose not get enough oil from the clutch pump to be very effective. But it is better than nothing, it dose help.
I just purchased a
ACCU-STEER-HPU-150-12-AUTOPILOT-STEERING-PUMP I am planing on adding a hydraulic ram, actually 2 to my rudder post and using this to and a jog toggle to do power steering. I am hoping to be around 18 months from leaving to do some cruising🤗 but we will see.
Obie

[Obie]

I am hoping to put together a list of everyone on this site. Then when I get under way, pull into your marine drink all your RUM, swap stories then off the the next!!

[TowLou]

Rum? When do you hit NYC? Hope she is doing you well Obi. I just seen this thread.

[Xsbank]

I've got rum by gar! Pop by anytime, as long as we can drink it on your boat!

Did you also sort the compressor?

[MOJO]

This may help you with your decision: MOJO is a 50' (49'-10") all steel trawler, Beebe Design #112. She displaces about 75,000 lbs and carries 1,500 gal of fuel. She is powered with a 1989 Cummins 5.9BTA-M1 engine coupled to a ZF BW-61 transmission with a 4.67:1 ratio. She swings a 40x34 4-blade prop on a 3" ss shaft. The Cummins engine does a fine job of moving her along. At 1,600 rpm she makes 7.5 kts and burns 2.7 gph. Max speed is ~9.3 kts at about 2,100 or so. She's probably a little over-propped since the Cummins is a 2,500 rpm max engine, but I don't run her wide open so it's not an issue. I've owned her since 2000 and put about 1,000 nm per year on her.

[FF]

"This may help you with your decision: MOJO is a 50' (49'-10") all steel trawler, Beebe Design #112. She displaces about 75,000 lbs and carries 1,500 gal of fuel. She is powered with a 1989 Cummins 5.9BTA-M1 engine coupled to a ZF BW-61 transmission with a 4.67:1 ratio. She swings a 40x34 4-blade prop on a 3" ss shaft. The Cummins engine does a fine job of moving her along. At 1,600 rpm she makes 7.5 kts and burns 2.7 gph. Max speed is ~9.3 kts at about 2,100 or so. She's probably a little over-propped since the Cummins is a 2,500 rpm max engine, but I don't run her wide open so it's not an issue. I've owned her since 2000 and put about 1,000 nm per year on her."

This is an excellent match up of engine/trannt and vessel.

Only in a custom build will a right sized engineered power train be found.

Happily the designer and owner selected the package , not an advertising dept!

[MOJO]

Actually it was a custom build, designed and supervised by Robert Beebe. However, the original engine was a massive (in size) Cat D-13000. 150 hp at 1,200 rpm max. Was coupled to a 3:1 Twin Disc gear, same shaft & prop. But, it was an air start engine and the previous owner said it was a royal pain to get started. So, he removed it and put in the Cummins with the ZF tranny. He and his wife did all the work themselves... During the pre-purchase sea trial I hired a Cummins factory service rep come along. He hooked up a bunch of instruments/gauges to the engine before we got underway. All his measurements were spot on, he couldn't find any fault with the installation or operation of the engine. I have to say, the Cummins has been essentially flawless (knock wood) over the 17 years we've cruised the boat!