I almost sank plenty at boat launch forgetting drainplug! To check compression without a guage you can crank motor and put your finger over hole to get a rough guess 120 psi will at least cause your finger to push up using some pressure. I’ll get back on trim after i can remember precheck. That is a shallow hull design and max. Rider weight is 400lbs they say 2 passenger but be prepared for tippyness. It will be tricky to get on plane also especially with more weight in back.