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04 Johnson 115 replaced vro with standard pump

E

Evilrude

Member
Does anyone know how exactly the standard fuel pump connects to the exhisting hoses. I have the main inline fuel still connected to the filter. And the pulse to the brass bib coming from the bottom left of the pump. Do I need the vapor hooked somewhere. The pump came with no direction or diagram. And I can't find anything onbyhe web. Thanks
 
Are there three ports? blow on all three until you can blow through the pump. That port goes to the fuel filter, the one air came out goes to the carbs and the one you can not blow through or suck through is the pulse port. If you still have the pulse limiter on the block get a brass nipple with the right thread size to match the pulse nipple on the pump and try and keep the pulse hose as short as possible for better fuel flow.
 
http://www.marineengine.com/newparts/part_details.php?pnum=OMC0435009
This is the pulse limiter for the VRO are you removing the vapor separator as well? On the older models they use a dual pulse pump system for proper fuel flow to meet the demand on the V-6 engines. Not sure on your engine how you would go about it but sure it can be done if you use the dual pump system you will have plenty of lift for when your tank gets low.
http://www.marineengine.com/parts/j...RLCNB&manufacturer=Evinrude&section=Fuel+Pump
You should have two pulse ports one for the vro and the other for the vapor pump.
 
When you slide the photo you'll see my fuel intake from the tank. Next to the fuel intake filter is the vapor seperator that went into the bottom of the vro. Just confused on wether the fuel line still flows through this filter or connects to the new pulse pump. It is a three port pump. Probably gonna call the guys at maxrules tomorrow.
 
If the vapor separator is still working just connect the fuel line from the bottom of the separator to the cap on the new fuel pump. and the out goes to the carbs. then connect the pulse port to the pulse limiter in the block. The pulse port is the smaller of the barbed fittings on the pump.
 
This is correct way to do it...
Just unbolt the old VRO, plug in the plastic 90 degree fitting on new pump into vapor separator, mount pump to hold it in place, install pulse line on brass nipple, install line from bottom of vapor separator to cap nipple on new fuel pump. 60 degree motor fuel pump pull fuel thru separator not push..the cover on fuel pump is out to carbs.
 
Ok that's pretty much what I did. I just need to cut a piece of gas line for the vapor line. And the fuel line from the gas tank is still going into its original spot correct? Ill be getting to it after work and report back thanks.
 
That is correct you may need to prime the carbs first prior to starting as your primer bulb will prime the vapor separator only. You will know quickly if the fuel pump is working properly.
 
Ok well I hooked up the vapor to the cap pumped the bulb took a couple try's but it fired off. And basically is doing the same thing it was before. It runs really rough for about 15 seconds then dies. Won't even try at a higher rpm. So I'm going to take the newly rebuilt carbs off again clean them again put them back on again and see if it was just clogged high speed jets. If not it's going to the doctor.
 
Removed the carbs and again the float bowls are so warped they looked like they were smiling at me . I had this issue 5 years ago when I bought the motor. They didn't look that bad when I rebuilt the carb two months ago but there pretty bad now. I'm sure they were sucking air. So I'm ordering new ones and will clean they carbs until they get here. Still glad I changed out the vro cause between the 1/4 inch hole in the pump diaphragm and the warped bowls I'm sure something was gonna give. hopefully I'll nip it in the bud. I'll update the status asap. Thanks for all the help
 
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