Re: 90hp sport jet trouble...
Get a fuel pump diaphragm , you will need the following to repair it :
Diaphragm .. F438747
Block gasket ...F658803
Pump housing gasket .. 820490
Bowl Gasket ... 823606
These are all mercury part numbers, Should end his problems .
As far as the flush thing goes , You can just get a brass fitting at Lowes that will adapt the hose on the boat to the garden hose but be sure just to use flow , no pressure and yes have it on before starting ! This is what I posted in response to a flush question :
There are 2 flush kits available , A "consumer" kit that is used for only flushing , it is not suitable to run the boat out of water . this kit attaches to the top of the head just behind the thermostat housing . Hook a hose up to it and using water flow only , no pressure (do not open the hose up all the way ) I test my flow by holding the hose end straight up and open the valve until I have full flow but no "fountain" coming out the water is just running down the sides of the fitting , run it for 5 min. Wash the jet drive area and a quick rinse of the engine compartment and you are set .
The "dealer" kit is an adapter that goes on the single black hose coming from the lower engine mounting plate , You can run the boat out of water with this hooked up ( up to1800 rpm , Never with the drive engaged ) but the same flow/pressure rules apply . Also if you use the dealer type you need to take the hose and get it around the fitting on the engine plate to finish flushing the jet drive . A little extra time but it needs to be done. Then same thing wash jet drive area and light wash inside the engine compartment .
