Seeker Knowledge
Project
Drive Train
The complete propulsion journey from the Cummins diesel and Allison transmission through transfer cases, the Hundested variable-pitch system, shaft, and propeller.
Featured video
Building an Engine Room
Published 2017-10-03
Start here for the Drive Train story.
Starts at 07:41
Videos
Videos follow the project timeline. When Part 1 of a series is reached, the complete series stays together before the timeline resumes.
Cummins Diesel from School Bus to Sailboat
Hundested Controllable Pitch Prop and Other Things
DIY Boat Propeller - Part 3
DIY Boat Propeller - Part 4 - The Failure
DIY Boat Propeller - Part 5 - The Success
DIY Boat Propeller - Part 6 - Casting Lessons Learned
DIY Boat Propeller - Part 7 - Welding Repair
DIY Boat Propeller - Part 8 - Machining the Groove
DIY Boat Propeller - Part 9 - Machining and Balancing
DIY Boat Propeller Part 1
DIY Boat Propeller Part 2
Hundested V-3 FR-H Teardown
Hundested V-3 FR-H Teardown Part 2
Hundested Rebuild - Part 1 - Casting the Distributor Ring
Hundested Rebuild - Part 2 - Machining the Distributor Ring
Hundested Rebuild - Part 3 - Pitch Controller Assembly
Skeg and Rudder - Part 3 - Propeller Shroud
Skeg and Rudder - Part 7 - Propeller Fit Up
ROV Thrusters - Part 1
Boat Building Tour and Invitation
Engine Room - Part 1
SV Seeker Tour and Invitation
The Mind of a Boat Builder - Zora
Hydraulics - Part 3 - More that One Way to Skin a Cat
Engine Room - Paint,Pumps,Coolant,Fuel,Mounts
Cutlass Bearing Removal and Painting the Shaft Log
DIY Boat Propeller - Part 10 - Tested at 600 rpm
Propeller Drive Train
Hundested Variable Pitch Propeller Controller Rebuild and Installation
School Bus Transmission in a Boat - Part 1 - Torque Converter Removal
Volvo Power Steering Pump for Boat Propeller Hydraulics
Problems Pitching the Prop and Learing to Steer
Propellers - Stainless Aluminum Composite - Diameter and Pitch
Upgrading a Cummins 5.9 from 12 to 24v and Charging Lithium Batteries
Divorced Transfer Case Wanted
Divorced Transfer Case - Part 2 - NP200 - Patrons Only
Found the Problem When I Dove the Propeller - Patrons Only
Divorced Transfer Case - Part 2 - NP200
Found the problem when I dove the propeller
Ballancing the Propeller by Finding Center of Gravity
Divorced Transfer Case - Part 3 - NP205 First Test
Balancing the Propeller by Finding Center of Gravity
Divorced Transfer Case - Part 4 - Test Run
Transfer Case Mods and Getting Ready to Change the Cutlass Bearing While in the Water - Patrons Only
Pulling the Prop Shaft and Cutless Bearing in the Water
Transfer Case Short
Transfer Case Mods and Getting Ready to Change the Cutlass Bearing While in the Water
Enjoying the Little Things
Oil Circulation Question
SV Seeker Training Video - Part 1 -Tour
Hurricane Two Step
Shakedown to Tampa - Transfer Case Dies- Watch Alarm is Born
Port Saint Joe and Making Repairs
Another Transfer Case BOOM
Around the Straits of Florida - Key West to Ft Pierce
Into the Atlantic
Fort Pierce Repairs - Part 1
Fort Pierce Repairs - Part 2
Transfer Case Mount Improvement
Worst Possible Time
Torque Convertor Eliminator Upgrade
Broken Drive Shaft - Saildrive
Propeller Drive Line Upgrade - Dealing with Stress
Hundested Variable Pitch Propeller Pitch Lock
Death of an NP205 T-Case
Work to be done in Charleston
TCase2
Cutting and Balancing Propellers - DIY Marine Engineering
Propeller and Dragon Work
Hundested Bites the Dust
Variable Propeller Pitch Locked Up on Us
Prop and Sail Repairs
Not Quitting on the NP205 Transfer Case
If it's not one thing, it's your Mother
T-Case Again - Failing My Way Forward
Transfer Case - BIG Bearing
Allison 545 Throttle Valve Modification
NP205 Transfer Case Going On The Shelf
Key West Nanoplastics Expedition 2026
Hundested Variable Pitch Controller Diagnosis
Hundested - Like the Sands of the Hourglass
Hundested - So That's Not the Problem
Hundested Variable Pitch Prop Pushing to Puerto Rico
Propeller and Whaly
Transfer Case Propeller Drive System - I think it's done!
Components & concepts
- Members not assigned yet.
Principles demonstrated
- No approved lessons assigned yet.
Evidence sources
Sources are ordered by their role and reliability, not by volume.
Journey
- Journey links will be added as the history is reviewed.
Sources and discussion
Primary evidence appears first. Community discussion follows. Outside forums are commentary and may include speculation or inaccuracies.
Primary evidence
Videos
Videos, transcripts, website material, and Doug-authored project posts.
Transfer Case Mods and Getting Ready to Change the Cutlass Bearing While in the Water - Patrons Only
67 additional references are indexed for search.