when flushing the engine with the transom flush on a2020 22lsv does there need to be pressure? or will there be suction.

[EricLsv]

also am i supposed to be climbing under the boat and blocking the raw water intake?

[wdr]

There should be a provision in the transom flush assembly to prevent water from going that direction and out the raw water pick up  grate. At least on all of the boats factory equipped that I have dealt with.

[spikew919]

4 minutes ago, EricLsv said:

also am i supposed to be climbing under the boat and blocking the raw water intake?

There should be a valve to close right over raw water intake inside engine bay. 

[ahopkins22LSV]

There is a shutoff valve in the bilge of the boat. No need to block it off from the underside of the hull.

[wdr]

You will want good water pressure to flush any air out of the system to prevent over heating. I did my friends FI 25 and had to rev it to get it to prime with his transom flush.

Edited May 25, 2021 by wdr

[EricLsv]

awesome info thank you all!

[oldjeep]

Isn't there a check valve in the flushpro - or do you really have to shut the valve on the intake? 

[wdr]

Never seen any of them w/o check valve. BICBW