Uploaded June 2024 | Updated September 2026, 2 weeks ago
This is not a boat maintenance how to video. Rather, it is my first attempt at performing a 100 hour (yearly) service on my Mercury 90hp outboard engine. The marina where I store my boat quoted me $500 to replace the engine oil, and that felt extreme. I ultimately swapped out the fuel filter once the video concluded (will try and record that next time).
For the marine experts in the audience, how did I do? What can I do better next time? Thank you for your feedback.
Products Used
SeaSense Outboard Muffs: heyderfolks.com/myvp
Lisle Oil Dispenser: heyderfolks.com/mw2q
1/2" ID Tubing: heyderfolks.com/3l0x
Tekton 1/2" Torque Wrench: heyderfolks.com/lnfc
Oil Filter Pliers: heyderfolks.com/l9hh
00:00 Yearly Service Mercury Outboard
03:20 Battery Cleaning
04:53 Coolant Flush
06:10 Task List & Tools
06:45 Visual Inspection
07:15 Taking the Prop Off
08:07 Bore Sleeve or "Cavitation Ring"
09:00 Draining Gear Case Oil
09:26 Draining Engine Oil
10:06 Replacing Oil Filter
12:16 Preparing New Oil
12:37 Filling Oil Reservoir
12:55 Filling Gear Case w/ Oil
13:35 Lubing & Reinstalling Prop
14:14 Test Run
Some of My Favorite Tools
Scraper: heyderfolks.com/nt27
1/4” Drive Long Handle: heyderfolks.com/ooeh
Safety Glasses: heyderfolks.com/6mb3
Spark Plug Socket Set: heyderfolks.com/9d2d
Scissors: heyderfolks.com/gb0o
Air Chuck: heyderfolks.com/f4gx
Metal Polish: heyderfolks.com/pbn3
Thin Wrenches: heyderfolks.com/c06v
Push Pin Pliers: heyderfolks.com/95i0
AA Battery Container: heyderfolks.com/o3ci
AAA Battery Container: heyderfolks.com/rmf1
Sliver Removal: heyderfolks.com/l1dr
Transfer Pump: heyderfolks.com/ya04
Laser Distance Finder: heyderfolks.com/axtd
Stud Finder: heyderfolks.com/i9d2
Circuit Breaker Finder: heyderfolks.com/5c9v
Ultrasonic Cleaner: heyderfolks.com/ty23
This is not a boat maintenance how to video. Rather, it is my first attempt at performing a 100 hour (yearly) service on my Mercury 90hp outboard engine. The marina where I store my boat quoted me $500 to replace the engine oil, and that felt extreme. I ultimately swapped out the fuel filter once the video concluded (will try and record that next time).
For the marine experts in the audience, how did I do? What can I do better next time? Thank you for your feedback.
Products Used
SeaSense Outboard Muffs: heyderfolks.com/myvp
Lisle Oil Dispenser: heyderfolks.com/mw2q
1/2" ID Tubing: heyderfolks.com/3l0x
Tekton 1/2" Torque Wrench: heyderfolks.com/lnfc
Oil Filter Pliers: heyderfolks.com/l9hh
00:00 Yearly Service Mercury Outboard
03:20 Battery Cleaning
04:53 Coolant Flush
06:10 Task List & Tools
06:45 Visual Inspection
07:15 Taking the Prop Off
08:07 Bore Sleeve or "Cavitation Ring"
09:00 Draining Gear Case Oil
09:26 Draining Engine Oil
10:06 Replacing Oil Filter
12:16 Preparing New Oil
12:37 Filling Oil Reservoir
12:55 Filling Gear Case w/ Oil
13:35 Lubing & Reinstalling Prop
14:14 Test Run
Some of My Favorite Tools
Scraper: heyderfolks.com/nt27
1/4” Drive Long Handle: heyderfolks.com/ooeh
Safety Glasses: heyderfolks.com/6mb3
Spark Plug Socket Set: heyderfolks.com/9d2d
Scissors: heyderfolks.com/gb0o
Air Chuck: heyderfolks.com/f4gx
Metal Polish: heyderfolks.com/pbn3
Thin Wrenches: heyderfolks.com/c06v
Push Pin Pliers: heyderfolks.com/95i0
AA Battery Container: heyderfolks.com/o3ci
AAA Battery Container: heyderfolks.com/rmf1
Sliver Removal: heyderfolks.com/l1dr
Transfer Pump: heyderfolks.com/ya04
Laser Distance Finder: heyderfolks.com/axtd
Stud Finder: heyderfolks.com/i9d2
Circuit Breaker Finder: heyderfolks.com/5c9v
Ultrasonic Cleaner: heyderfolks.com/ty23
