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Fuel recycle 28 May 2021 12:49 #111916

I skipped ahead and read only the conclusion starting on page 14.  They really call out OMC.  The worse example they state is an OMC at idle dumping 42% of fuel. I guess we just need to go WOT all the time.





With studies like that done so long ago, it is a wonder two stroke outboards stayed in production as long as they did. The Etec was a very fuel and oil efficient engine, too bad the legacy of the earlier motors was what is was, now we have four stroke outboards, while being great motors in many ways, the 30 HP motors weight the same as my 50 HP two stroke. Not a step forward in my book ;-)
Never doubt the wisdom of dumb question’s.
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Fuel recycle 28 May 2021 12:38 #111915

I skipped ahead and read only the conclusion starting on page 14.  They really call out OMC.  The worse example they state is an OMC at idle dumping 42% of fuel. I guess we just need to go WOT all the time.
1952 Deluxe Runabout 1963 Gale 40hp
1959 Deluxe Clipper 1973 Merc 500 50hp
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Fuel recycle 28 May 2021 02:19 #111913

I did some research on this topic a while back and found this EPA Study of Crankcase fuel drainage.  I got a kick of it as it is a real study on the topic. Makes for some light reading.

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EPA Crankcase Drainage Study
50 Something Vagabond (54)
1960 Lone Star Eldorado
2001 25hp Yamaha
1961 40hp Evinrude
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Fuel recycle 27 May 2021 12:13 #111909

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If you live north of the border, I hear that there was a factory option available for this... ;)

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Fuel recycle 26 May 2021 21:25 #111896

Ormand, Ray just reposted an older thread on the process of collecting waste fuel/oil, have a look through its not all that difficult to do, I only made one modification to this and I ran a second line from the collection tank to redirect the gas fumes back up into my air silencer intake, mainly because I run 56' motors that are pressure systems and are not single line fuel pump, so the option of running it back into my fuel tank is not an option

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Fuel recycle 26 May 2021 20:50 #111892

Now none of that, I like them old motors.  You just need to spend time on them to keep them in good nick as the Brits say.  

Makes you a smarter person too.
 
Vintage Mercury Restorations

Lake life is the best life,
Jump in a boat and go


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Fuel recycle 26 May 2021 12:50 #111886

Now none of that, I like them old motors.  You just need to spend time on them to keep them in good nick as the Brits say.  
1952 Deluxe Runabout 1963 Gale 40hp
1959 Deluxe Clipper 1973 Merc 500 50hp
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Fuel recycle 26 May 2021 02:53 #111883

I think give the old Johnson  a good send off after you get the new tohatsu it would make a really cool mailbox
Charlie 

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Fuel recycle 26 May 2021 00:07 #111874

Here is the previous thread on your subject.

www.feathercraft.net/forum/29-outboard-m...modification?start=0

And I know Jabe did the mod on his '56 30 HP Johnson


hey Ormand, I have done 3 30hp, 1 35hp, and a 15hp that is said can't be done, I don't know what motor you have to help you, it's pretty easy if your mechanically inclined, I have posted in some of my threads of what to do, I will have to hunt them down for you as to where,  cheers my friend will try and help the best I can
 

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Fuel recycle 25 May 2021 22:39 #111871

Ormand before you do a crankcase drain recovery modification you need to make sure that you've got the motor running good and in tip top shape.

Should you decide to sell your motor the modification most likely will be alien territory for the buyer and may chase them away. 

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