Since 1991, the OMC factory service manuals include a troubleshooting chart and a section on how to test, take apart, and service the VRO pumps. But I just dropped a cylinder and now am trying to find a good used 150 or 175 for the boat before I sell it. Since 1986 (and on updated 1984's and 1985's), the pumps have an alarm system that operates off the alternator or tachometer circuits. Vro pump conversion to straight fuel pump 12v. Senior Refuge Member. Actually, he only needs a refresher in the correct starting procedure.
As the back and forth motion is generated in the air motor, the double-action fuel pump's piston (orange) and diaphragm is pushed and pulled by the rod cycling fuel to the carburetors. The air motor, - a fuel pump, - an oil pump, and. Also, the ratio could be made variable to allow for different lubricating needs based on engine throttle setting. When working on a fuel system, check for any restrictions or air leaks which would affect the engine. VRO to Pulse Pump on Johnson 115. Earlier versions of this article have appeared in BASS & WALLEYE and TRAILER BOATS magazines, the AM-Tech newsletter, and other online resouces. In working with Sam with his older 210 equipped with a older VRO "Neverrude" that for the most part they were as strong as death... If it has a black face on it, replace it with a blue style (OMC P/N 435009). It consists of four basic sections: Cutaway View of VRO Pump Showing Major Components.
By the way, the SystemCheck® can be adapted (with accessory kit P/N 176709) to any engine with a four-wire VRO pump. This is why YAMAHA had to run so many fuel pumps on there engines as they kept pulse type pumps. But this is one comment I received about the negatives of doing this: Brian, after what I have been told you will get diaphragm failure after a short time, as the oil side of the pump is not loaded by oil. One beep every 20 to 40 seconds is a low oil level in the remote tank. I have been running premixed gas with the original VRO pump successfully. It also dispells some of the myths that have arisen in "dock-talk" about the VRO system. The fuel side of the pump recently went out. I found an article on those older engines (see below) that really goes into detail on the VRO pump operation that I thought might come in handy for others. As the oil flows into the fuel area, the pressure moves a small piston that actuates a steel pin in the alarm module. Vro pump conversion to straight fuel pump systems. Since the VRO depends on crankcase pulses to operate, it is susceptible to backfires from a lean running cylinder or an out of tune engine. A "NO OIL FLOW" alarm system. PREVENTIVE MAINTENANCE. Here is the instructions I've found to disable it: ********************.
The correct way to do it is to discard the complete VRO-unit and install a standard fuel pump on the crankhouse. I have a 1995 Johnson 115hp Fast Strike (60* V-4). If an oil tank is exposed to the elements such as in an open boat, installing the tank inside a covered battery box will protect it from spray. Vro conversion how to convert your vro fuel pump to a standard fuel pump. The information, software, products, and services published on this web site may include inaccuracies or typographical errors. There is no mechanical maintenance that has to be performed on the pump itself, but the VRO system should be inspected occasionally for cracked lines, leaks, and broken clamps. I just bought a new boat a month ago. Should I disable my VRO. Replace the VRO fuel pump with a simple fuel only pump. OMC took care of the blown powerheads and improved the pumps considerably.
A fuel restriction such as from a bad anti-siphon valve, kinked line, or a partially plugged filter does not allow a full charge of gas to be drawn into the fuel pump cavity. The mechanic told him the VRO went bad. Pump the fuel primer bulb until fuel exits that hose with the tint of whatever oil you used. A vapor lock situation does the same thing).
I had it disconnected on my motor and never had any problem with the motor!!! OMC introduced the VRO on the V-4 and V-6 engines in 1984. I'm not the least bit mechanicaly inclined, but I'm learning, and several of of my more mechanicaly inclined friends and I have come to the conculsion that it must be the fuel pump. Vro pump conversion to straight fuel pump relay. 115hp Johnson VRO Fuel Pump Modification. The original VRO from 1984 and 1985 had a black fuel outlet fitting and no wiring. Why I Delete the VRO & Run My Engines Out of Gas.
The oil line should be OMC's 1/4-inch I. D. inner "rubber" hose (OMC P/N 333485) without any splices. Video time control bar. Please review our Warranty, Returns & Refunds policies before you place an order. If you see any signs of contamination, the tank should be flushed clean, the filter (OMC P/N 174377) changed, and the oil line purged. VRO Oil Pump information. What's left of Pine Island. Is this some great secret being held on to by Johnson Evinrude mechanics. You can also replace the clear plastic cap with the later model's solid black filler cap (OMC P/N 176217) that provides much better water intrusion resistance. One of the most common causes of engine failure is water in the remote oil tank. How to Remove and Replace a Johnson or Evinrude VRO oil Pump with a Direct Fuel Pump. They are calibrated for each model of pump. A typical conversation that we've all heard at one time or another might go something like this: For instance, the first boat owner's problem (1) is an air leak somewhere in the boat's fuel system causing "foamy" fuel instead of a solid column of liquid. How To Remove Evinrude VRO & install Pre-mix Fuel Pump Conversion MasterTech Marine. Also, pre-mixing set the gasoline-oil mix to a fixed ratio, typically 50:1.
In 1996, the SystemCheck® warning gauges were introduced. 3 - Mix the 50/1 oil in the proper amount with whatever quanity fuel you have. FIO Fuel Pump Conversion to Standard Fuel Pump. One of the bones OMC owners like to pick concerns the oiling system. As for the constant sounding horn at high speed that stops when slowing down, that's a fuel restriction warning, not a VRO malfunction. The operator just had to keep the oil reservoir full and oiling would be done automatically.