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fuel delivery issues 1997 outrage 20
grahamg	#1  Posted on 04/05/16 - 7:28 PM
Member Posts: 13 Comments: 0 Joined: 04/03/16	my 1997 outrage 20 has a fuel delivery issue, will start and run but goes lean and then dies due to no fuel delivery from internal tank. if I run an external tank 10gal from deck of boat it is not a problem. Hoses look OK can't tell if it is a vent problem not getting enough air in tank to prevent a vacuum forming, fuel line from tank to engine sucking air in from crack some where or fuel line to engine blockage. am running a 175 carbureted Evenrude loop charged ocean pro. thought about the fuel pump but doesn't seem to affect the smaller tank so I don't think that is the problem any suggestions on process to figure this out would be appreciated . thanks (changed abbreviated year to full 4 digit year per guideline #1 at the top of this page) Edited by Joe Kriz on 04/06/16 - 9:54 AM
Hoosier Gal	#2  Posted on 04/05/16 - 7:34 PM
Member Personal Page Posts: 7 Comments: 0 Joined: 02/13/15	First thing I'd check would be the anti-siphon valve at the fuel tank pick-up.
tmann45	#3  Posted on 04/06/16 - 4:29 AM
Member Posts: 196 Comments: 0 Joined: 02/18/07	grahamg wrote: snip... Hoses look OK can't tell if it is a vent problem not getting enough air in tank to prevent a vacuum forming, fuel line from tank to engine sucking air in from crack some where or fuel line to engine blockage. Some hoses are known to delaminate internally and block flow even though an external inspection they look perfect. To check the vent, just loosen the filler cap when running.
Phil T	#4  Posted on 04/06/16 - 10:49 AM
Administrator Personal Page Personal Album Project Albums Posts: 6986 Comments: 6 Joined: 03/26/05	Agree with Tmann. Does the fuel line to the motor have a primer bulb? When the engine stalls, is the bulb flat (collapsed?) Check the vent first. Look at the vent opening from outside. Next, access the vent fitting and remove the hose clamps. Blow into the tank. If cause not found, I would replace vent hose, fuel fill to tank as well as fuel line to motor to the alcohol resistant type.