Identify the Carrier Before You Put Any Force on the Gearcase

There is no evidence-supported removal sequence that applies to every Honda outboard. To remove the internal propeller shaft safely, first record the exact engine identity, match it to the correct Honda parts diagram and factory shop manual, and determine how that particular bearing carrier or holder is retained. Do not apply extraction force until every retainer and the required shift arrangement have been confirmed.

This is a model-identification and damage-prevention guide—not a substitute for the factory disassembly procedure. The available evidence does not establish universal extraction forces, heat limits, torque values, special-tool numbers, or a complete removal sequence.

The short answer: do not start pulling until you identify the gearcase

“Prop-shaft removal” here means extracting the internal propeller shaft and its bearing carrier or holder from the lower unit. It is not the simpler job of sliding the external propeller off its splines.

Before choosing tools, record what you can verify directly:

• Complete Honda model designation
• Model year
• Serial number
• Standard or counter-rotation configuration
• Gearcase configuration
• Every visible bolt, ring, tab, clip, and locking device around the carrier

Check that the manual actually covers lower-unit disassembly for that configuration rather than only routine maintenance.

The available reports describe two materially different concepts: a BF150-style holder with two visible retaining bolts and a smaller-engine arrangement using a threaded retaining ring with locking tabs. Neither report supports transferring its procedure to another model. A generic set of Honda instructions could therefore tell you to pull while an unidentified retainer remains engaged.

Use this retention-design decision table

What the gearcase shows	What the reports indicate	What to do next
A BF150-style holder with two retaining bolts	In one BF150 thread, the owner had removed two bolts. Another contributor believed the shaft and holder should withdraw together, but acknowledged having no direct BF150 experience. See the BF150 discussion.	Confirm the remaining retainers, shift position, shift-shaft handling, approved tools, attachment points, and complete sequence in the manual for the exact serial range. Bolt removal alone does not establish readiness to pull.
A smaller BF30/BF40/BF50-family arrangement with a threaded retaining ring	A discussion involving a 1999 Honda 50 HP describes locking-washer tabs and a special tool that engages recessed dogs in the ring. See the retaining-ring discussion.	Verify the design in the matching Honda documentation, identify every locking tab, and follow the specified tool procedure. Do not apply this branch to a BF150 unless its documentation shows the same arrangement.
Any different arrangement—or uncertainty about what you see	A bolt, ring, tab, clip, or other component may still retain the assembly.	Stop and identify every component in the model-specific diagram before applying an extraction load.

What the BF150 report does—and does not—establish

In the BF150 thread, the owner had removed the holder’s two bolts and unsuccessfully tried a homemade slide hammer. Forum contributor “jgmo” said the propeller shaft and holder should come out together as an assembly, but also explicitly stated that he had not performed the procedure on a BF150. The contributor was extrapolating from work on smaller Hondas, and the owner later reported damage and ordered a replacement assembly. Read the complete BF150 forum exchange.

The thread also left a central question unresolved: whether the shift shaft must be removed, repositioned, or placed in a particular gear. It therefore cannot support a numbered BF150 extraction procedure.

For the applicable BF150 gearcase, the matching factory documentation must establish:

• Whether the propeller shaft and holder are removed together
• The specified gear or shift position
• Any preliminary shift-shaft handling
• Every retainer that must be removed or released
• The required tools and their correct attachment points
• The full removal and installation sequence

Model designation alone may not account for differences associated with serial range, rotation, or gearcase configuration. Do not interpret the two visible bolts as proof that the holder is free to move.

Why smaller Honda retaining-ring instructions are different

The separate 1999 Honda 50 HP discussion concerns access to prop-shaft seals and bearings through a threaded bearing-carrier retaining ring. The owner initially could not turn the ring and later discovered that more than one locking-washer tab remained engaged. Participants also described a Honda tool that engages recessed dogs in the ring, although the evidence does not provide a verified tool number. Review the smaller-Honda owner discussion.

If the model-specific diagram confirms this type of ring, every locking tab must be identified before the ring is treated as stuck.

The same discussion reports that an improvised hammer-and-screwdriver attempt cracked a lower-unit housing. That account supports a clear warning against improvisation; it does not establish a substitute removal method.

Removing the retaining ring is also not necessarily equivalent to extracting the complete propeller-shaft assembly. The factory procedure must still identify what remains connected behind the carrier, how the shift mechanism is handled, and which components are intended to come out together.

If the carrier is seized, protect the housing—not the puller

Only consider the carrier potentially corrosion-bound after the correct diagram and procedure confirm that all retainers are clear. Even then, resistance is not a reason to move from a slide hammer to a larger puller or from a ring tool to a hammer and screwdriver.

The forum discussions mention penetrating oil, cautious heat from a heat gun, light pressure, and patience. These are anecdotal descriptions of forum practice—not Honda-approved instructions or recommended remedies here. The evidence does not establish safe application points, temperatures, heating times, pulling-force limits, or tool arrangements. Without those specifications, heat and extraction pressure should not be improvised.

Stop work if:

• The gearcase housing flexes or begins carrying the extraction load
• The puller or other extraction tool slips
• The retaining-ring dogs begin to deform
• The carrier cracks, distorts, or shows fresh damage
• Severe corrosion is visible around the carrier bore
• Light, controlled pressure produces no movement
• Any retainer or shift requirement remains unaccounted for

At that point, take the complete lower unit to an experienced lower-unit technician. The smaller-engine discussion reports that a machine shop ultimately removed a seized ring, but that outcome does not establish a universal machining method or current price.

Plan the entire repair before the shaft comes out

Removal is only one part of the job. Before opening the gearcase, use the matching Honda procedure to determine which tools, replacement parts, measurements, and tests apply to the intended repair.

Confirm these categories rather than treating them as a universal shopping list:

• Factory shop manual covering the exact model and serial range
• Matching parts diagram for the correct rotation and gearcase
• Any carrier, retaining-ring, seal-removal, or installation tools specified by Honda
• Required shift position and shift-shaft instructions
• Replacement seals, O-rings, locking washers, tabs, clips, or other parts identified as replaceable or single-use
• Specified lubricants and gear oil
• Clean trays, labels, and a method for preserving component order
• A camera for documenting each layer before it is disturbed
• Any pressure- or vacuum-testing equipment required by the applicable procedure

Photograph and label shims, thrust washers, gears, bearings, spacers, and related components as they are exposed. Preserve their order and orientation without assuming that another Honda model uses the same arrangement.

Obtain torque values, seal installation details, shim or backlash requirements, gear-oil procedures, and leak-test specifications from the exact Honda manual. The BF150 owner reported that a Seloc manual omitted lower-unit disassembly, so verify the manual’s contents and coverage before beginning.

Proceed only when the retention design, every retainer, the required shift position, and the official sequence are known. If any of those remain uncertain—or if the carrier stays stationary and the housing begins taking the load—stop and take the lower unit to a qualified technician. Professional extraction is preferable to turning a seal or bearing repair into a damaged-gearcase replacement.