Old Tacoma Marine, Inc.

Atlas-Imperial Engine Co

Known remaining Atlas-Imperial diesel engines


Atlas-Imperial model numbers are a combination of four different designations: cylinder number, block type, application, and cylinder volume. Block types were either "H" heavy-duty engines with individual cylinders and heads; or "E" en-block engines with a solid block and individual heads. Application could be "M" (marine), "S" (stationary), or "N" (industrial). Cylinder volume is the cubic volume in inches of a single cylinder. For example, a 4HM763 Atlas-Imperial is a marine heavy-duty diesel with four cylinders and a volume of 763 cubic inches per cylinder.

Click on the grey headings to sort table by column. Names struck out designate an engine's original provenance prior to removal for display.
 
Model Serial Engine Bore Stroke Cyl HP RPM Owner Originally Currently State
6EH253 12743 Vagabundo 6.25 8.25 6 135 900 Jerry & Tanya motor-sailer yacht Washington
2HM282 Dave's 2HM282 6.5 8.5 2 30 600 Dave Milholland marine display Washington
3HM282 Dave's 3HM282 6.5 8.5 3 45 600 Dave Milholland marine display Washington
3HM282 Dunlin 6.5 8.5 3 45 600 Chug Leede tugboat yacht Washington
3HS282 Duryea Ice Company 1 6.5 8.5 3 50 650 Long Island Antique Power Association compressor display New York
3HS282 Duryea Ice Company 2 6.5 8.5 3 50 650 Rough & Tumble Engineers Historical Association compressor display New York
3HM282 NWMPM's 3HM282 6.5 8.5 3 45 600 Northwest Marine Propulsion Museum marine display Washington
4HM282 BC 4HM282 6.5 8.5 3 45 600 unknown marine unknown British Columbia
4HM282 Arro 6.5 8.5 4 60 600 Keith Benson yacht yacht Washington
4HM282 Buster 6.5 8.5 4 60 600 Stuart Marshall tugboat yacht Washington
4HM282 Dave's 4HM282 6.5 8.5 4 60 600 Dave Milholland marine display Washington
4HM282 Mark's 4HM282 6.5 8.5 4 60 600 Mark Utlaut marine display Oregon
4HM282 Spike's 4HM282 6.5 8.5 4 60 600 Spike Blaine unknown display Hawaii
4HM282 Tuckahoe 6.5 8.5 4 70 650 Tuckahoe Steam & Gas Association unknown display Maryland
3HM464 Bob's 3HM464 7.5 10.5 3 50 400 Bob Helm marine display California
4HM464 Ilwaco Fishboat 7.5 10.5 4 70 400 Wayne Thackery fishboat display Oregon
6HM464SC Bee 7.5 10.5 6 120 400 unknown tugboat yacht Alaska
6HM464SC Lorna Foss 7.5 10.5 6 120 400 Dan Grinstead tugboat tugboat Washington
6HM464 Sobre Las Olas (port) 7.5 10.5 6 120 400 Sean Connolly yacht yacht California
6HM464 Sobre Las Olas (starboard) 7.5 10.5 6 120 400 Sean Connolly yacht yacht California
6EM327 Tuhoe #1 7 8.5 6 120 600 MV Tuhoe Preservation Society auxiliary schooner museum vessel New Zealand
6EM327 Tuhoe #2 7 8.5 6 120 600 MV Tuhoe Preservation Society auxiliary schooner museum vessel New Zealand
6EM327 Furnace Creek 7 8.5 6 120 650 The Borax Museum unknown display California
4HM528 Vigorous II 8 10.5 4 85 450 Ron Brazell yacht display California
4HM528 Delta Ferryboat 8 10.5 4 85 450 Ron Brazell ferryboat display California
6EN668 NASA genset 9 10.5 6 200 514 unknown generator in storage Florida
6EN668 Redding genset 9 10.5 6 200 514 Rocky generator generator California
6EN668 junkyard crane 9 10.5 6 240 600 Hendrik Ido Ambacht Junkyard crane crane Netherlands
6EN668 Vietnam cranebarge 1 9 10.5 6 240 600 unknown crane crane Vietnam
6EN668 Vietnam cranebarge 2 9 10.5 6 240 600 unknown crane crane Vietnam
6EN668 shipyard crane 9 10.5 6 240 600 Fairhaven Shipyard crane crane Washington
6EN668 navy cranebarge 9 10.5 6 240 600 US Navy crane crane Hawaii
6EN668 Fred's 6EN668 9 10.5 6 240 600 Fred Dorfeld crane unknown Washington
6EN668 Pago Pago crane 9 10.5 6 240 600 Pago Pago Shipyard crane crane Samoa
45M5X8 ST-2130 9 10.5 8 600 720 Bruce Morelan tugboat yacht Washington
45M5X8 WLV 604 Columbia 9 10.5 8 600 720 Columbia River Maritime Museum lightship museum vessel Oregon
45M5X8 WLV 605 Relief 9 10.5 8 600 720 US Lighthouse Society lightship museum vessel California
45M5X8 Gowanus Bay 9 10.5 8 600 720 Jessica Dulong tugboat tugboat New York
45M5X8 Hoga (YT-146) 9 10.5 8 600 720 Arkansas Inland Maritime Museum tugboat museum vessel California
45M5X8 Hudson 9 10.5 8 600 720 unknown tugboat unknown St. Croix
Smithsonian 3 9 10.5 8 600 720 National Museum of American History unknown display District of Columbia
3HM681 trade school engine 8.5 12 3 65 325 Harbor History Museum marine museum display Washington
3HM681 9598 Argo 8.5 12 3 65 325 Columbia River Maritime Museum fishboat display Oregon
9 8003 Smithsonian 1 8 12 3 55 320 National Museum of American History marine display District of Columbia
6HM681 Arcturus 8.5 12 6 140 325 Keith Tollett survey yacht California
3HM763 Brady's 3HM763 9 12 3 75 325 Brady Ferguson unknown display Washington
3HM763 Telegraph 9 12 3 75 325 Telegraph Cove Lodge generator display British Columbia
3HM763 Clyde's 3HM763 9 12 3 75 325 Mark Utlaut unknown unknown Oregon
3HM763 Mike's 3HM763 9 12 3 75 325 Mike Perry unknown display Oregon
4HM763 Brady's 4HM763 9 12 4 110 325 Brady Ferguson unknown display Washington
4HM763 Elmore 9 12 4 110 325 Dee Meeks tugboat yacht Washington
4HM763 8390 Newt 9 12 4 110 325 Erik Rasmussen & Laura Phillips tugboat liveaboard Washington
4HS763 Waterfall #1 9 12 4 120 400 Waterfall Cannery Resort generator generator British Columbia
4HM763 Westward 9 12 4 110 325 Hugh Reilley yacht yacht Washington
4HM763 Wakefield Cannery 9 12 4 110 325 unknown unknown derelict Alaska
4HS763 Jeremy's 4HS763 9 12 4 110 325 Jeremy Weiks generator display Washington
6HM763 Sultana 9 12 6 160 325 LaVern Beier cannery tender charter Alaska
3HM1021 Kittie B 10 13 3 100 325 David Baxter tugboat yacht Washington
3HM1021 Clyde's 3HM1021 10 13 3 100 325 Mark Utlaut unknown unknown Oregon
4HM1021 Jim's 4HM1021 10 13 4 135 325 Jim Walsh unknown display Nevada
4HM1021 Raven 10 13 4 135 325 cannery tender tugboat yacht California
6HM1021 Inverness 10 13 6 200 325 Dick Lavers tugboat yacht Washington
6HM1021 PSATMA's 6HM1021 10 13 6 200 325 Puget Sound Antique Tractor & Machinery Association marine museum display Washington
6HM1021 Quail 10 13 6 200 325 Rollie Culbertson cannery tender yacht Washington
6HM1021 Taconite (port) 10 13 6 250 360 Taconite Classic Yacht Charters yacht charter British Columbia
6HM1021 Taconite (starboard) 10 13 6 250 360 Taconite Classic Yacht Charters yacht charter British Columbia
4HM1125 Irene 10.5 13 4 155 350 Marshall Hibnes tugboat yacht Washington
4HM1125 Voyager 10.5 13 4 155 350 South Seattle Community College marine display Washington
4HM1125 Vivian 10.5 13 4 155 350 Douglas Peckman fishboat yacht Washington
4HS1125 Waterfall #2 10.5 13 4 155 350 Waterfall Cannery Resort generator generator British Columbia
4HS1125 Waterfall #3 10.5 13 4 155 350 Waterfall Cannery Resort generator generator British Columbia
6HM1125 Pacific Sunrise 10.5 13 6 250 360 Mark McCaffrey fishboat yacht Washington
6HM1558 Elise Ann Conners 11.5 15 6 300 300 Gary Matthews tugboat liveaboard New York
6HM1558 Palomar 11.5 15 6 320 325 Dave Haizlip tugboat yacht Washington
6HM1558 Thea Foss (starboard) 11.5 15 6 275 275 Foss Maritime Company yacht yacht Washington
6HM1558 Thea Foss (port) 11.5 15 6 275 275 Foss Maritime Company yacht yacht Washington
6HM1558 Urger 11.5 15 6 300 300 New York Canal Corporation tugboat museum vessel New York
6HM1558 Rival 11.5 15 6 300 300 Everingham Bros. Bait Co. garbage scow baitboat California
6HM1558 Yellowfin (starboard) 11.5 15 6 320 325 Pacific Yellowfin Charters freighter yacht British Columbia
6HM1558 Yellowfin (port) 11.5 15 6 320 325 Pacific Yellowfin Charters freighter yacht British Columbia
6HM2124 Alpo 13 16 6 400 300 Sami tugboat tugboat Finland
6HS2124 Big Swan Pump 13 16 6 400 300 Big Swan Drainage and Levee District marine drainage pump Illinois
6HM2124 11811 John Arthur 13 16 6 400 300 George Coates tugboat yacht Maryland
6HM2124 Merikarhu 13 16 6 400 300 unknown tugboat unknown Finland
6HM2124 Normandea 13 16 6 400 300 unknown tugboat unknown Finland
6HM2124 Poitsila 13 16 6 300 300 unknown tugboat unknown Finland
6HM2124 11814 Ready 13 16 6 400 300 Tim Tawny tugboat yacht California
6HM2124 Ever 13 16 6 400 300 National Museum of American History tugboat display District of Columbia
6HM2124 Songhee 13 16 6 400 300 M/V Songhee tugboat charter British Columbia
6HM2124 Tolvan 13 16 6 400 300 unknown tugboat unknown Finland
6HM3358 Flywheelers' 6HM3358 15 19 6 600 300 Florida Flywheelers Antique Engine Club unknown display Florida
6HM3358 Velero IV 15 19 6 600 300 Velero IV Charters LLC research research Washington
9 Intrepid 90 90 9 900 900 James Waltz tugboat yacht Washington
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