I have an 88 Invader 181. Has been a great boat It is powered with a Merc 3.0 and an Alpha 1 drive I want to say it is somewhere in the 24 gallon range. Has been a long time since I filled her ALL the way up as I usually get gas on the way to the lake and whenever I stop at the marina.
I have run her 50 miles in a day before with great results and had plenty of gas to run back to the marina several miles away the next day. I have run her on long weekends without fueling up however we were not running her long distances. I believe the most I ever put in her after first purchasing her was about 13 gallons in one single run.
Sadly she is in need of being rebuilt as she has a rotten transom and the floor has collapsed over the fuel tank. She has been a great boat we do love her. She is one of those fiberglass over plywood boats that you can never seem to keep the water out of after they get to a certain point. The hull however is solid as a rock.
I bought her used over 10 years ago for a song. Had her maintained regularly doing a lot of the regular stuff myself. Never had a serious issue with her. She never left me stranded and never needed a tow. She tows a skier and a tube just fine and tops out at about 37 mph..
I am going to look at an used 2002 chaparral 220 SSI tomorrow. She looks rough but the price is right, she runs and is solid. A buddy of mine gave me a free SeaRay Seville 210 that is in need of a complete rebuild.
