Hi Tan, I replaced the impeller and it's pumping water much better (impeller was definitely due) in a trash can, but still not pumping through the flush fitting. I've looked through the exploded diagrams and still can't see how the water is supposed to flow from the flush fitting to the water pump. It looks like it's just an open chamber in the extension housing, or should there be a connection straight into the water pump?
Hi my name isXXXXX will assist you.
No all they want is water flow to the engine some water works it's way down to the water pump through the water tube. They don't you to run the engine on the flush. This is strictly for no running flush. The water will still flush the engine without running the engine.
On the Honda, according to the user manual you can run the motor on the flush connector. It's the only way to run de-salinator through the coolant system. It used to run through there fine, and I'd get lots of water flowing out through the prop outflow and the normally underwater intakes, but it would also 'pee' from up near the power head. In a trash can, it 'pees' great from the outflow up near the power-head. The flush fitting is down at the top end of the gear case housing. There's no water any more through the flush fitting.
I was thinking of a different flush. Do you have the fitting that screws in close to the water pump? If yes what you have is a clogged flush attachment. Clear the flush passage you most likely have debris and corrosion clogging the passage. The slotted screw on the side is this where your fluish screws in.
35 yrs. experience. I/O, Outboard & Inboard, Complete engine repairs.Certified Technician
I think I figured it out. My original flush attachment got damaged, I had the broken area aluminum welded then had a new hole tapped in the housing next to
it. the old location. The old location was actually a channel into the water pump area. I just drilled the weld (really soft) and then tapped it the size of the flush fitting. Will reconnect the lower unit tomorrow night and let ou know. Won't solve my bi-metallic corrosion problem unless you know of a way to coat or treat brass so it won't rot aluminum.
If you can find some aluminum tubing or pipe make a flush attachment out of the aluminum. Change the threads to 3/8 16 this is the same thread they use for the drain plugs and being a coarser thread it won't tend to gall.