Both the Mainship 34 Trawler 2008 and the Mainship 40 Trawler 2008 are semi-displacement designs, both built in fibreglass, so the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

Size is the most obvious dividing line here. The Mainship 40 Trawler 2008 measures 41,0 feet overall (2008), giving it roughly 5,0 additional feet of deck space compared to the Mainship 34 Trawler 2008 at 36,0 feet (2008). Weight tells a clearer story for trailering families: the Mainship 40 Trawler 2008 tips the scales at 24 000 lbs - 4 000 lbs less than the Mainship 34 Trawler 2008 at 20 000 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.

The power gap is worth calling out. Rated to 370 hp, the Mainship 34 Trawler 2008 has a 130-hp advantage over the Mainship 40 Trawler 2008's 240-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Mainship 40 Trawler 2008 carries 300 gallons versus 250 gallons in the Mainship 34 Trawler 2008. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Mainship 40 Trawler 2008 is rated for 12 passengers, while the Mainship 34 Trawler 2008 caps at 11. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Mainship 40 Trawler 2008 could be the deciding factor.