VRO Pump Question

pittpete · Aug 30, 2025

I have a VRO pump off a 2002 Johnson 90hp and one from a 2001 50hp.
Is the only difference, is that the fuel/oil mix outlet is smaller on the VRO from the 50hp?
Thanks

flyingscott · Aug 30, 2025

Are you sure its smaller?

pittpete · Aug 31, 2025

flyingscott said:
Are you sure its smaller?

airshot · Aug 31, 2025

Housing is smaller but not sure hole is smaller based on the pucture..

pittpete · Aug 31, 2025

airshot said:
Housing is smaller but not sure hole is smaller based on the pucture..

Housing is exactly the same size on both.
Every part is identical except fuel out.
Had a small air leak in my original so I took the fuel out fitting and put it on the 50hp one.
Going to fire it up tomorrow

flyingscott · Monday at 12:33 AM

Just put the smaller fitting on the new pump. The pump #s are the same but come with different elbows.

saltchuckmatt · Monday at 1:50 AM

pittpete said:
Housing is exactly the same size on both.
Every part is identical except fuel out.
Had a small air leak in my original so I took the fuel out fitting and put it on the 50hp one.
Going to fire it up tomorrow

I don't think it matters, the fuel line to the carbs steps down to a smaller fuel line right away

airshot · Monday at 10:02 AM

I should have stated the OD of the part where the hole is. Did not mean housing of unit. Sorry for any confusion. From the pics, the holes looked the same ID but the outside of that part where a hose would fit over is bigger on one over the other.

Open Water · Tuesday at 6:07 AM

Have you considered mixing 50:1 in the tank. Did that with a 1990 Johnson 140 VRO and it idled perfectly. Wish I had done it much sooner.

pittpete · Friday at 9:09 PM

Open Water said:
Have you considered mixing 50:1 in the tank. Did that with a 1990 Johnson 140 VRO and it idled perfectly. Wish I had done it much sooner.

Id really like to keep the VRO.
I dont mind fixing and learning about this engine.

saltchuckmatt · Friday at 11:17 PM

pittpete said:
Id really like to keep the VRO.
I dont mind fixing and learning about this engine.

Perfect answer. Many videos on it and always buy the best quality parts that are out there....usually OEM.

dingbat · 2025-09-06T06:09:52-0600

pittpete said:
I have a VRO pump off a 2002 Johnson 90hp and one from a 2001 50hp.
Is the only difference, is that the fuel/oil mix outlet is smaller on the VRO from the 50hp?
Thanks

OMC recommends 5/16” fuel lines up to 115 HP and 3/8” for 115 HO and above.

If I remember correctly from when I put a new pump on my motor, the kits came with adaptors to accommodate both 3/8” and 5/16” fuel lines.

Still have the 5/16” adaptor rolling around in the bottom of my tool box

VRO Pump Question

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