'86 40hp fuel issue

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Stevewr54

Cadet
Joined
Sep 22, 2008
Messages
13
E40ELCD has a problem with the lower cyl. washing down from excessive fuel.
I have rebuilt both carbs, switched carbs top to bottom, replaced reeds, plugs,
coil all to no avail. When cruising at 3 to 4K RPM you can see a LOT more
fuel being pulled thru the lower carb. throat. It also seems to want to push
fuel out the front of the carb also. This thing has me stumped! What am I missing here? Thanks in advance, Steve
 
B

Blade_Link

Seaman
Joined
Aug 4, 2009
Messages
60
Re: '86 40hp fuel issue

you might have your feul mix to high id check the pump and your lets might be too loose you might need to tighten them up
 
tashasdaddy

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: '86 40hp fuel issue

fixed jets, reeds, causing blow back.
 
B

bagnallt

Seaman
Joined
Jan 27, 2008
Messages
63
Re: '86 40hp fuel issue

Hi...
I had exactly the same thing happen on my 50 hp...... bottom carb lots and lots of fuel even though I had rebuilt them both.. I got a second carb kit and rebuilt the bottom one again. What I found was that the float was sticking down and flooding out the bottom cylinder..... I fixed with the new parts and it has been great ever since.
 
B

bagnallt

Seaman
Joined
Jan 27, 2008
Messages
63
Re: '86 40hp fuel issue

Hi...
I had exactly the same thing happen on my 50 hp...... bottom carb lots and lots of fuel even though I had rebuilt them both.. I got a second carb kit and rebuilt the bottom one again. What I found was that the float was sticking down and flooding out the bottom cylinder..... I fixed with the new parts and it has been great ever since.
 
D

Daviet

Fleet Admiral
Joined
Sep 24, 2008
Messages
8,958
Re: '86 40hp fuel issue

Fuel flow into carb controlled by needle and seat. Reed plates prevent crankcase pressure from coming out of carb.
 
S

Stevewr54

Cadet
Joined
Sep 22, 2008
Messages
13
Re: '86 40hp fuel issue

tashasdaddy said:
it is a relatively easy process, you can see diagrams here, (intake manifold) http://shop2.evinrude.com/ext/index.aspx?s1=bf6ad09c53cead335fcfd8a6471c0f7f
i would order 2 of these (should be a pair, one pair for each carb)

Part Number: 0317739
Description: LEAF VALVE

one of these

Part Number: 0317504
Description: GASKET, REED BOX
Click to expand...

Replaced them early on in the struggle. Also has new fuel pump(non-VRO) and
a new sensor coil. Could this be a ring issue? Thanks, Steve
 
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