In this video, I go over how to service a 40 and 50hp Tohatsu. This includes changing the oil, oil filter, lower unit gear oil, fuel filter, spark plugs, removing the prop, and replacing the impeller.

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Note: Many of these parts/service items are offsets to genuine Tohatsu parts. Use them at your own discretion!!

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Engine oil (Tohatsu pt no. 332823080M) https://amzn.to/3DYjNKR

Oil filter wrench (Tohatsu pt no. 3AC990900) https://amzn.to/3DX5Z3e

Oil filter (Tohatsu pt no. 3R0076150M) https://amzn.to/3UMLD2P

Gear lube (oil) for the lower unit (Tohatsu pt no. 332823100M) https://amzn.to/3riaXzS

Additional (Gear lube pump) https://amzn.to/3BQ9sOz

Spark plug (Tohatsu part no. 970111121) https://www.ngk.com/ngk95064ikr6g8...

Power trim/tilt fluid (Dexron III) https://amzn.to/3StGj2i

Fuel filter (Tohatsu part no. 3B7022340) https://amzn.to/3ChDGeN

Water pump impeller (Tohatsu part no. 3C8650212) https://amzn.to/3rdv9Dm

24C Marine grease https://amzn.to/3B7iBCL

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Additional tools for service

Digital torque adapter 3/8” https://amzn.to/3Y3SiXN

Oil drain pan https://amzn.to/3HdIxjL

Rubber mallet https://amzn.to/3F51FOq

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Torque specs and additional info

Engine oil with oil filter change (without oil filter change) 2400ml roughly 2.5 quarts (2200mL roughly 2.3 quarts)

Engine oil drain plug 17 ftlb

Oil filter 13 ftlb

Gear oil roughly 500ml or roughly 1/2 a quart

Spark plug 13.3 ftlb

Bolts holding lower unit to upper limit 3845 ftlb (not given in the manual this is rather a general spec for the industry)