Simple answer is it sucked up some weeds and the transmission oil cooler is clogged. Easy fix, and something a person should do as preventive maintenance a couple times a season.
And yes, you can start a boat out of water and not see any immediate issues, but this will catch up with you with shortened impeller life and potentially an overheated boat on the water.
Full Trailer LED Light Package
2 6" Flush mount Stop/Turn/Tail Lights w/Grommets, 4 clearance lights
and Stainless Over 80" Light bar. Delivered for $70
ALUMINUM WHEEL AND TIRE PACKAGES
SINGLE AXLE 14" PACKAGE STARTING AT $369
SINGLE AXLE 15" PACKAGE STARTING AT $439
TANDEM AXLE 14" PACKAGE STARTING AT $649
GOLF CART TIRE & WHEEL PACKAGE STARTING AT $589
PM me or email firstname.lastname@example.org