I have very low hot water flow/pressure from either dock water connection or the pump. I get a burst of water when first opening a faucet, which almost immediately slows to a trickle. Happens on all faucets and shower. 2000 410 Sundancer.

[Chubby]

Wish I had the answer - I have a 2001 45 EB and just last week (April 15th 2018) I started to experance the same thing! Always had good water flow and then BAM! .... burst of water for 2-4 sec,. and the trickle ....... I see you asked this questing several months ago but no one answered ...... did you ever find the problem?
I will be looking to my problem over the next few weeks but IF you solved this problem it would save me many hours. 
Hope to hear from you soon. IF I find the problem I will post it ASAP. 
Dan