If there are no problems with that Crestliner, IMHO it is a great buy. You are correct about it being underpowered, top speed probably 35 mph in the interest of disclosure I own a Crestliner 1850 Sportfish.
Bought new in 1997 with 150 hp Johnson, 8 hp 4 stroke Johnson with MG Trolling motor and Electronics just under 26k for point of reference. With an hour meter that is accurate for the big motor, it is sad to see how few hours you run the big engine. The kicker engine gets probably 5 times as many hours as the main engine, possibly 7-10 times as many if I was forced to guess.
Last edited by ColoGregS; 09-16-2019 at 03:14 PM.