The cartridges in the water pump are specified a tough chrome plating to guard against internal abrasion even when used in muddy water.
The customer is usually to indication and return the paperwork inside the envelope https://nevemhou945775.blogolenta.com/26831327/how-much-you-need-to-expect-you-ll-pay-for-a-good-yamaha-outboard-head-torque-specs