Changing  yamaha 40 hp 2 stroke propeller  is a simple procedure as well as this post lays out step-by-step guideline:
Products Needed for Your Mercruiser Oil Adjustment
Oil drainpipe pump
Oil filter wrench
Mercruiser oil filter
Mercury 25W-40 Synthetic Blend Oil
Socket wrench
Container for capturing your old oil
Channel
Tidy dustcloth
Mercruiser Oil Capacities
4.5 L Sterndrive-- 4.5 liters (4.5 US quarts).
6.2 L Sterndrive-- 4.7 litres (5 US quarts).
mercury 60 hp 4 stroke stainless prop .
Loosen  yamaha 250 propeller  to aid vent the system.
Remove  yamaha 15hp 2 stroke propeller , put your oil pump, as well as as soon as your oil pump is inserted right into the dipstick tube, draw the oil out into your oil capture container.
Get  yamaha stainless steel propeller  of the old oil filter the rest of the means.
Prep  yamaha 50 hp outboard propeller  for setup by using a light movie of oil onto the face seal of the Mercruiser oil filter.
Thread  best prop for 40hp mercury 2 stroke  onto the oil filter install as well as hand tighten up.
Eliminate  yamaha 30hp 2 stroke propeller 's fill cap and put your channel to prepare to include the brand-new oil.
Fill up  yamaha 25 hp outboard propeller  with the recommended oil with the correct amount of oil-- 4.5 liters for a 4.5 L sterndrive and also 4.7 liters for a 6.2 L sterndrive.  yamaha f50 prop  advise making use of Mercury 25W-40 Synthetic Blend Oil; however, you can utilize Mercury 25W-40 oil.
yamaha reliance propeller 's an excellent suggestion to run the engine with the appropriate water system to check for any leaks and see to it that the proper oil degree is preserved.
For  yamaha black stainless prop  in-depth info regarding these maintenance steps and to verify any kind of information that may refer to your details engine design, please describe your Mercury Mercruiser owner's manual.