Hi all! This is my first post and first rib! Sorry to say but i am getting myself extremely frusterated over this project.
A few months back i purchased an 89 HBI 14.7 ft RIB that looked to be in decent condition... for approx 2500 dollars. Seemed cheap enough. Boat was rated for 1400lbs motor gear and passengers. My goal was to make it a dive platform for 2-4 people. Manufacturer told me it was basically the same exact hull as they make today. My first mistake was it had PVC tubes under a canvas cover (the owner said he wasn't sure but he thought they must be hypalon). They dont stay hard and there are a few leaks but at this point it is moot because i dont think i would dump 6 grand into getting new tubes.
Over the months i have added a CNC trim tilt bracket ($500) to the 50 horse motor and a t-top ($1300). Along with a new gas tank ($400) that i didn't know was rotted out! I have redone all electrical and fuel systems as well as having the motor gone over and seals replaced.
Weight wise the boat is well within specs and is right at its upper limits for the motor rating however i am very disapointed with how low the stern sits in the water. The water level sits right at the scupper letting water into the boat if i dont plug it... Also in rougher sees water can makes it inbetween the tubes and the transom or sometimes even over the transom when sitting still and rocking. The self bailing capability is shot because of how low the scupper sits. I have considered some ways to fix this problem instead of selling the boat as i will take a bath if i do because i have way more $$$ into it than it is probably worth. The best solution i have come up with is the addition of something like an armstrong positive buoyancy bracket.
My next biggest problem is power/speed... stripped the boat did 30 knots (was expecting more like 40). With the t top, furniture, and two people i am lucky to get 20 knots. This is hugely disapointing. I do not think the boat is propped wrong. But cant figure why such a small boat is having this kind of issue with 50 HP. Engine runs fine and has been gone over by a marine mechanic and has 130-140 compression.
So how am i suposed to dive off a boat that cant handle hardly any weight?!
Okay guys let me have it... what would you do? Would brand new tubes make it sit higher in the water/ less drag more speed? Pertinent suggestions would be great.