Replacing VRO pump with NON VRO fuel Pump

[tashasdaddy]

Re: Replacing VRO pump with NON VRO fuel Pump

sounds like it was disconnected before. as long as the oil line is plugged.

 

[Reggie08]

Re: Replacing VRO pump with NON VRO fuel Pump

I'll check into it. Which line is the oil line? Is there any sort of test I can do to see if it's working properly?

 

[wellcraft26]

Re: Replacing VRO pump with NON VRO fuel Pump

I also have a VRO problem. I have a mid 80's Johnson I think, and is 70hp and mine was disconnected many years ago and now the fuel pump is leaking due to a crack in the housing. I spoke to a mechanic and he gave me the part number 438556 (sierra part # 18-7352) I ordered but this pump is for smaller engines, between 25 to 55hp and it only has an inlet and outlet (two hose nipples), there's no way to connect the valve from the block of the engine.
I need a replacement part # (prefer not to be OEM, is too expensive) with something I can be able to connect the valve too like three hose nipples.

I just want to use a regular fuel pump not a $250 + pump.

Thanks in advance for any help.

 

[wellcraft26]

Re: Replacing VRO pump with NON VRO fuel Pump

ezeke, you mentioned that the pump 18-7353 is a replacement pump for a 1977 140hp even that is rated for a motor up to 55hp. My question is do you think the fuel pump by sierra part# 18-7353 will work on my mid 80's 70hp even is rated for an engine up to 30hp?

Thanks for any info.

There is considerable foolishness in the way these pumps are listed.

In the 1973-1976 motors 135HP, a single lift pump was used to supply the fuel for the 135HP engines; the part number was 385784. 385784 has now superseded to part # 438559. That's the pump used by Rickdb1boat.

In 1977 the 140HP used one lift pump, part #388268. That pump now supersedes to 438556. That's the pump that smkonwatr used.

The difference is that the 438559 has three hose nipples, and 438556 has only two. So it is dependent on the engine mounting and where the pulse comes from as to which one will work for you.

Sierra 18-7352 lists as the aftermarket replacement pump for the OEM 438556, which as stated is the listed pump for a 1977 140HP engine.

 

[ezeke]

Re: Replacing VRO pump with NON VRO fuel Pump

In the last sentence quoted above I believe that I said that 19-7352 is the aftermarket equivalent of the 1977 140 pump # 438556. This is because the 18-7352 has only two hose nipple; one for incoming fuel and one for outgoing fuel. It gets its pulse from the back of the pump directly from the cylinder.

!8-7353 has three hose nipples, one incoming fuel, one outgoing fuel and one for the hose for the pulse.

So it just depends on what you need.

I try to avoid the recommendation for the reason that the VRO pumps were more powerful and if converted to premix are a very good pump, often at no cost to the owner. While the electronics and oil sides of the VRO pumps are not repairable, the mechanical, gasoline side is.

 

[wellcraft26]

Re: Replacing VRO pump with NON VRO fuel Pump

Thanks for the quick reply ezeke, I wanted to use the pump from the VRO but the plastic housing is broken and is leaking.

I just want something that works on my 70hp and have to have 3 hose nipples. Do you know the part number for what I need? Do you think the 18-7353 will work even is rated up to 30 hp?

Thanks again

In the last sentence quoted above I believe that I said that 19-7352 is the aftermarket equivalent of the 1977 140 pump # 438556. This is because the 18-7352 has only two hose nipple; one for incoming fuel and one for outgoing fuel. It gets its pulse from the back of the pump directly from the cylinder.

!8-7353 has three hose nipples, one incoming fuel, one outgoing fuel and one for the hose for the pulse.

So it just depends on what you need.

I try to avoid the recommendation for the reason that the VRO pumps were more powerful and if converted to premix are a very good pump, often at no cost to the owner. While the electronics and oil sides of the VRO pumps are not repairable, the mechanical, gasoline side is.

 

[wellcraft26]

Re: Replacing VRO pump with NON VRO fuel Pump

Btt

 

[wellcraft26]

Re: Replacing VRO pump with NON VRO fuel Pump

Need help by monday.

Does someone know what is the part number for a fuel pump for a 1984 johnson 70hp. Not OEM, I need to replace the whole thing. Looking for a sierra part #.

Thanks in advance.

 

[wellcraft26]

Re: Replacing VRO pump with NON VRO fuel Pump

Can someone please give me the part number for a fuel pump of a mid 80's johnson 70hp , if possible sierra part#.

Any help will be greatly appreciate.

 

[wellcraft26]

Re: Replacing VRO pump with NON VRO fuel Pump

Hi guys, I haven't been able to find the part number for a fuel pump for a johnson 70 hp, giving another try in here. I will be very appreciated if some can help me, is frustrating because her in the area were I live no one knows anything about this pump.

thanks in advance

 

[christopher orlando]

Re: Replacing VRO pump with NON VRO fuel Pump

I have a 1997 Johnson 150 ,could someone please explain to me how to make a "T" fitting for the hoses splitting off the three carbs on one right side and the three on the left,coming from the pump, will a t fitting restrict fuel flow awesome thread help me out so much thank you all

 

[mapuariki]

Re: Replacing VRO pump with NON VRO fuel Pump

Just read this post because I am doing the same project. I read all the threads and there is nothing about the old wiring from the vro. Once I unplug it from the harness, what do I connect back to the harness(coming from the engine)?

 

[karlow1]

Re: Replacing VRO pump with NON VRO fuel Pump

Such fun, I'm working on this conversion on my 1990 40HP.
I have won two pumps on Ebay. These are three hose pumps.
I'm sure they will work fine. But wait, there is more!
Pull the VRO pump. Pull the oil line, drain it. and plug it at the pump. Reinstall the pump.
Disconnect the harness from the pump. Pull the oil tank, and disconnect/ cut the two lead connector from the tank. Purge the line form the filter. Mix the oil. Purge the system. Reconnect the the gas line and fire it up. I may install one of the the oil pumps someday. Breath the clean air. No more big cloud of oil smoke!
Safe and secure. It idles much better on the moffs, I hope runs better on the water!

KP

 

[ezeke]

Re: Replacing VRO pump with NON VRO fuel Pump

To mapuariki: Unless your engine is a V6 or larger, none of the OMS/VRO wiring is reconnected when using premix. Just be sure that the temperature switches in the cylinder heads are still functioning.

The larger engines have a vacuum switch near the fuel pump that should remain connected. It is a fuel obstruction warning device.

 

[TJSPAPPA]

Re: Replacing VRO pump with NON VRO fuel Pump

Good Evening -

I am considering relacing/bypassing the VRO pump. My brother has an Envirunde 70hp VRO and had to replace a cylinder due to compression loss - low oil intake. My Johnson 70hp is identical to his setup and he accomplished the conversion in similar fashion as mentioned in previous posts.

I have a question I'm hoping I can get assistance with. I am able to turn the motor over and keep it running only when I push the tumbler assembly in at the ignition which acts as the choke on my assembly. I replaced all of the fuel components up to the motor cover / fuel inlet assembly at the motor itself thinking I may have bad hoses from the tank and the pump ball had slight sights of dry rot.

After getting the motor to turn I noticed I was getting no water squirt out of the impeller at the right rear underside of the motor cover. When I checked the impeller hose that showed signs of aging but I replaced to be on the safe side. I get a couple of drips out of the motor but not a steady stream which led me to believe I may have a bad impeller. Since I replaced the hose assembly with clear tubing I found small "rubber like" bits and pieces in the hose pushing toward the impellar outlet. Is this common? What would it take to check/replace the impellar assembly??

I'm new to this forum and would greatly appreciate any recommendations as I have a little boy (6) who is anxious to get back out on the water

Many thanks!!

Jason

 

[ezeke]

Re: Replacing VRO pump with NON VRO fuel Pump

Changing the water pump impeller requires removing the lower unit, unbolting the water pump housing and replacing the impeller.

Most larger models require seven bolts to be removed from the lower unit and the shift rod to be disconnected at the top under the carburetors to drop the gearcase. Four additional screws hold the waterpump in place. The impeller is probably disintegrating and may be the source of your rubber bits.

The source of your running problem may be the ignition switch.

Any maintenance will be safer and easier with a factory service manual. The parts manuals are on line and free, thanks to BRP: http://epc.brp.com/default.aspx?brands=ej&lang=e

This thread is getting a little long in the tooth; maybe starting a new one would get you better help.

 

[ssmac]

Re: Replacing VRO pump with NON VRO fuel Pump

hey guys i have purchased the 438556 replacement as recommended by my supplier. I have not taken off the old VRO yet. The old pump looks as if it has 3 hose connections but my new pump has only two and an opening on the back that looks as if it should be bolted to a gasket on the engine block. My engine is a 1991 90hp evinrude ve90tleie. Do I have the wrong pump or is there a place to bolt to the engine. I assume this opening on the back is for the pulse generator and the two hose connections are fuel in and out. I would appreciate any help as I would like to tackle this job befor the weekend

 

[fan4NCSU]

Re: Replacing VRO pump with NON VRO fuel Pump

Great Forum!

Thanks Ezeke. I did the conversion on a 2000 130hp using the model number you provided for the three port connection (438559). I found the pump at a dealer local to me for $65 (he also sells the gas only VRO pump for $186). I took the boat to the lake today and it ran great except at WOT. At WOT the motor started to surge and die (fuel starved), but I can still make about 38 mph with no problems, so I'm not real concerned.

 

[ezeke]

Re: Replacing VRO pump with NON VRO fuel Pump

To fan4NCSU: You really should have two lift pumps working together for that large an engine, set up as the older V6 motors were. You are very likely to run lean and harm your engine running at WOT.

 

[fan4NCSU]

Re: Replacing VRO pump with NON VRO fuel Pump

Ezeke, I agree. I'm trying to find a rebuild kit for the VRO, but if i can't I won't be running at WOT until I add a second pump or go to a gas only VRO.

Again, thanks for the all the good information. I'd never have attempted this without the insight by so many knowledgeable folks in this forum.