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Gray Marine 2 stroke U type 6 horse

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Uploaded by on Aug 9, 2007

ca 1908-1910 (?) U type twin cylinder marine 2 stroke from Gray Motor Co in Detroit. Uses plunger type "mississippi mudsucker" water pump, Schebler D type carburetor, and Ford model T buzz coils....propeller reversing via timing advance change to run engine backwards.....found this during a fishing trip, cleaned it up, custom made some parts, and here it is....now I need to build a little boat!

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Uploader Comments (glowingdial)

  • how would one valve work for a 4 stroke engine

  • @123rcflyer

    ... the 1929/1930 Packard diesel radial aircraft engine did this (and you thought diesel airplanes were new) ...they did it by having the valve in the top of the head and a draft tube over it, fresh air would be inducted from the front then the valve would close, the compression stroke would take place, fuel would be injected, igniting and causing the power stroke to occur, then the valve would open again for the exhaust stroke and the exhaust would flow out the rear of the tube.

  • Very nice and I think very rare engine, looks also very reliable if cooled well and not overstressed.

    If you say 2 stroke "U" type, do you mean two cylinders, two pistons but one common combustion chamber?

    Very nice "lucky" sound too.

  • @XELA2T

    No, "U type" is just a model designation....it is a twin cylinder, two stroke in the usual sense.

  • thats the coolest thing ive ever seen and it sounded awsome!!! now only if u could put it on a go cart?? lol

  • I have given a little bit of thought to doing just that...could use a cvt as in a snowmachine...but this is only 6-8 hp at 500-1000 rpm so it would mostly just put around. ...but it does have a great sound though.

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All Comments (24)

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  • can i have that?

  • water pump ?

  • wat is that thing bbouncing around at the crank shaft ??

  • Was this was built just after George Washing took office? LOL

    What are you going to use it for?

  • @EddieRenanzinhu type r eh? those r nice

  • @sonnyman2000 hahaha it was a joke.. everythingg.. they suck. ahah lOl im just joking man.. i have a hondaa integraa. lOl

  • @EddieRenanzinhu whats wrong with hondas?

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