The john d. bosler devlin boat is for sale. this pre-owned 42 foot trawler, built by samual devlin designing boat builders in olympia wa, is moored at anacortes. 2 introduction the following information is a collection of articles written by the glen-l staff. our hope is that you find this information invaluable as you seek to. Small 25 foot diesel trawler gulf mariner built by independent shipwrights with yanmar 4jhe engine – duration: 21:42. top fun guy 30,694 views.