Just did my first oil change on my 2018 Yamaha F90XB. This is also my first 4-stroke outboard. The manual says it takes 3.17 US quarts without filter change and 3.38 US quarts with filter change. After draining (and playing with trim to make sure everything was out). I put approximately 3.17 quarts in (didn't change filter). I checked to make sure motor was level (put a level on the cavitation plate) and found I was at the bottom of the dipstick crosshatching. I decided to let it sit all night and re-check the next day. Same spot on dipstick. Added about a 1/4 quart. This brought it up a little (closer to the middle of the dipstick). Added touch more and now I'm about 3/4 the way up the crosshatch. I'm closer to 3.7 quarts added now (considerably more then what the manual states it takes). I decided to check what I removed. Dumped my drain pan into an empty 5 quart oil jug. Looks like about 3.5 quarts. This oil would have been added by the dealer since new motors are shipped dry (according to the manual).
While doing some searching I found this article from Yamaha: http://maintenance.yamahaoutboards.com/engine-oil-lube/
It states:
At the proper oil level, the oil should be halfway up crosshatch pattern on the dipstick.
Tip: The top and bottom of the crosshatch pattern on the dipstick do not represent “high” and “low.” The correct oil level indication is at the mid-point of the pattern. Use caution when filling or adding oil. Yamaha four-stroke outboards have a tapered oil sump design (smaller at the top than the bottom), so the closer the oil level is to full, the faster it fills. Therefore, add oil slowly and in small amounts, and do not attempt to “top off.” Do not allow the oil level to surpass the upper portion of the crosshatch pattern. Doing so may result in aeration of the oil, reducing lubricity and oil pressure, and may cause eventual engine damage.
It have attached a pic from manual on checking the engine oil level. It says "Check that the oil level on the oil dipstick is between the upper and lower marks".
The manual makes it sound like should be anywhere between the upper and lower marks (crosshatch area). The Yamaha website makes it sound like it should be be right in the middle. I think I might remove a little to be safe but was curious if anyone else has ran into this.
Thanks
While doing some searching I found this article from Yamaha: http://maintenance.yamahaoutboards.com/engine-oil-lube/
It states:
At the proper oil level, the oil should be halfway up crosshatch pattern on the dipstick.
Tip: The top and bottom of the crosshatch pattern on the dipstick do not represent “high” and “low.” The correct oil level indication is at the mid-point of the pattern. Use caution when filling or adding oil. Yamaha four-stroke outboards have a tapered oil sump design (smaller at the top than the bottom), so the closer the oil level is to full, the faster it fills. Therefore, add oil slowly and in small amounts, and do not attempt to “top off.” Do not allow the oil level to surpass the upper portion of the crosshatch pattern. Doing so may result in aeration of the oil, reducing lubricity and oil pressure, and may cause eventual engine damage.
It have attached a pic from manual on checking the engine oil level. It says "Check that the oil level on the oil dipstick is between the upper and lower marks".
The manual makes it sound like should be anywhere between the upper and lower marks (crosshatch area). The Yamaha website makes it sound like it should be be right in the middle. I think I might remove a little to be safe but was curious if anyone else has ran into this.
Thanks
