Outboard Propulsion Units TRIZ Cases

An adaptive wireless lanyard shrinks the helm safety zone with speed, then idles or stops propulsion to avoid dangerous shutdowns.

A hydrogen fuel cell, ECU, and motor share one outboard housing, using water cooling to prevent overheating without heavy battery packs.

A wireless helm-fob lanyard checks whether the operator stays in a permitted zone, then idles and neutralizes propulsion before shutdown.

An integrated radial and thrust bearing layout simplifies propeller shaft support and enables inspection or replacement without drydocking.

A helical magnetic rod inside the piston enables accurate stroke sensing with one protected sensor, reducing analog sensor count and maintenance.

A stepped piston structure repositions inner and outer portions to extend piston rod stroke in watercraft propulsion cylinder devices.

A case-integrated attachment hole secures a circulator between bevel gears, reducing oil-flow collision and rotational resistance.

Steam exhaust drives forced seawater convection in a conformal hull heat exchanger, improving cooler placement flexibility and resistance to blockage.

A pivoting hydrofoil mount lets boats gain drag reduction while folding clear for shallow water, transport, and lower fouling exposure.

Linked vertebrae and tension elements let a marine shaft collapse for storage, then stiffen to hold a motor or anchor in shallow water.

Placing the generator, actuator, driven unit, and power line in the lower case removes upper-case wiring and helps avoid propulsion device upsizing.

Two hydraulic clutch areas with proportional and on/off valves improve low-speed torque transfer, reduce slippage, and cut fuel use.

Dual input shafts and mixed-flow impeller geometry increase power delivery while maintaining pump efficiency in larger craft.

When primary propulsion tilts beyond a threshold, the vessel retracts or blocks auxiliary propulsion to prevent grounding damage.

A single tool clears foreign objects from a jet-drive inlet while its engaging formations rotate fasteners, reducing specialized tool requirements.

A larger intake resonator reduces watercraft noise while preserving compact propulsion packaging.

A rigging hose housing uses a gutter system to expel collected fluid through a dedicated drain hole.

Lateral offset between the helm platform and lower units prevents interference during retraction, while an elevated reservoir ensures self-priming.

A ship propulsion machine integrates inner and outer propeller shafts within a single bearing structure to reduce overall device length.

Nesting a silencer inside the V-shaped engine's concave intake space suppresses air noise while maintaining compact outboard motor dimensions.

A flexible fluke propulsion device eliminates impeller debris blockage by switching between manual and motor modes.

Relocating the outboard engine forward of the stern end clears the driver's rearward line of sight and improves maintenance access.

Repositioning fuel injection devices and high-pressure pumps inward reduces motor width while preserving direct injection output.

Mid bearings along propeller shafts prevent gear mesh misalignment and deflections under load.

A pontoon boat water mat features an inflatable design with a motor cut-out, resolving stowage difficulties by deflating into a compact form.

A controller adjusts trim tab lowering timing based on throttle angle to manage hull posture.

Segmented panels create a three-dimensional seat structure that improves access to storage compartments while maintaining a secure seal.

Elastic straps secure the flexible collection bag to the motor, resolving trade-offs between structural stability and ease of operation.

A compact outboard motor shift device repositions the slider offset to reduce size.

Segmented parallel driveshafts and integrated clutching systems enable dual propeller operation while minimizing transmission package size.

Wearable operator and passenger transmitters send radio signals to a boat receiver for immediate emergency detection.

Actuators move pontoons to counteract uneven loading, maintaining deck levelness and passenger comfort.

A battery management device connects multiple marine propulsion engines to shared power sources.

Valve stem width exceeds aperture size to retain broken parts in the marine propulsion unit, preventing engine flooding and damage.

Mismatched pole counts in the external rotor motor eliminate mechanical gears, reducing weight while delivering high torque for electric boat propulsion.

Vertical shaft adjustment improves watercraft stability and handling by resolving fixed propeller location constraints.

Merges relief path into vapor separator body to eliminate separate piping and reduce system complexity.

A hydraulic lubricating apparatus uses independent piston groups to actuate a distributor plate for precise cylinder oil dosing.

A marine outdrive system moves its propeller shaft vertically to optimize thrust point positioning.

Telescopic drive shaft sections accommodate hull space constraints by allowing the propeller unit to deploy while keeping the motor stationary.

Regenerative braking reduces engine rotation speed at shift-in, minimizing shift shocks and preventing engine stall.

Relocating the brake mechanism into the upper unit eliminates external protrusions that cause hydrodynamic drag and disrupt water flow.

A dual-pump system supplies lubricating oil to a hydraulic wet multiplate clutch, eliminating impact noise during forward and reverse switching.

An adjustable outdrive shifts the propeller shaft position vertically to optimize thrust and reduce drag during operation.

A marine drive system uses a complementary flange and edge to secure the propulsion unit in an extended position.

Segmented mounting decouples transducer orientation from motor rotation to preserve live sonar image clarity during automated steering.

Friction pads engage the crankshaft during assist mode to prevent unwanted rotation, resolving one-way clutch reliability issues.

Segmented shield design reduces installation time from hours to minutes while preventing hull leakage through an integrated waterproof gasket seal.

A boat maneuvering control system adjusts engine rotational speed based on target and actual speed differences to reach desired velocity.

A marine drive cathodic protection circuit interrupts anode current to sense reference potential accurately.