I have a 1989 70 HP Johnson 2 stroke- Where can I get a premixer for it?

Question

I have a Johnson 70 HP 1989 2 stroke that I use premixed fuel in at 50:1. Instead of pre-mixing my fuel all the time I would like to know if this model engine has a premixer available for them. I know its a bit older then modern 2-strokes where premixers are built in, but would just like to know where I can get one (Australia) & if its not too much trouble to set up adjacent to the motor. Thanks.

Answer 1

I took my pre mixer out!

When you mix your own then you know it's right!

Nothing can go wrong.

Please keep mixing it yourself!

Answer 2

You should be able to ring your local outboard wreckers or even a dealer to find a secondhand system as everyone round here takes them off , sometimes from new. I know the dealer removed the mixing system from my 115 so i never got a chance to try it. If you're on the Gold Coast , try QLD outboard wreckers or Southside Marine if you're on the south side of Brisbane.

Answer 3

You want to ADD a VRO? Whoa, nelly. Bad idea. The best thing you can do to an older VRO motor is disconnect it and premix the oil and gas. If you're already doing that, you're a step ahead.

Answer 4

that engine should have come from the factory with VRO variable ratio oiling system it consisted of a fuel/oil pump and a remote oil resivoir. contrary to what some MISINFORMED NO IT ALLS say this system works very well. the main cause of problems with the system was operator failure and failing to follow instructions and or procedures. In fact many dealers did not UNDERSTAND the system to properly set them up and educate the customer. your engine probably has the fuel oil pump, but someone disconected the oil and sensor line and started running pre mix. Both the pump and oil tank are available from bombardier. I would strongly reccomend a new pump as the one that has run without oil for a while may be weak from debris or water ingestion. contact me if you cant find parts. I have operated and maintained a fleet operation with many omc engines(particulary the 70 hp) and have hundreds of thousands of hrs of proper operation. I have also personally used large v4's and v6's with thousands of hours with vro use in a comercial setting. the system works great. People will try to tell you that the pump fails and doesnt pump oil and blew their engine up. That is FALSE the pump has a double sided diaphram and if it would quit pumping oil it would also not pump gas.(designed that way to shut of engine if pump not pumping oil). I have never seen a engine blow up(omc) due to the vro pump itself failing.again thousands of engine hrs plus thousands of hrs on customers engines. Usually when people had lubrication problems with this system they were self inflicted. the oil resivoir has a vent in the top and many people(dealers too!) would place the tank where it wuold get h2o in it. (some boats just got swamped. the pump would pump whats in the tank and if not oil THAT would cause engine failure. people (dealers also) would remember to drain gas tank after a boat sinking or filling up with water but forget the oil tank and have problems. Another failure factor was the INABILITY of dealers and home mechanics not following instalation guidelines and either pinching the oil hose or kinking during routing(or fastening to boat) causing oil flow problems. I have seen many rigged boats come in with improper clamps (or worse no clamps at all) on oil lines. and people wonder why the system failed!. the other thing I saw frequently was not primeinig and purgeing the air correctly during start up(premix required during initial operation). another problem (again not the systems fault) was people used POOR QUALITY oil. I had one case were a person used the cheapest oil he could find and it was very thick and gell like(not approved for oil inj.) this partially plugged the screen in the oil tank. he blew up the engine and I asked him why did you keep running the motor after the alarm went off(oh yea the system also has audible warnings for no oil, low oil situations). he told me that since he saw smoke coming from the engine, that he did not believe the horn and wrapped duct tape around it to quiet the NOISE as he said. HE ACTUALLY ASKED FOR WARRANTY!! I have seen motors experience oil related problems with VRO but never as a direct failure of the system. I have had pumps go bad and shut down as supposed to and when ther pump was replaced the engine ran fine. As I have stated people dont understand the system therefore it is bad. they also listen to people(dealers too) who DO NOT KNOW WHAT THEY ARE SAYING. this system works very well it save money(oil consumption) save on plugs/maintainence costs, pollution(burns calibrated amounts of oil) and vastly improves engine performance. this system sends mixed fuel to each carburetor preventing one cyl from oil starving. There is actually twice as many or more cylinder failures from the mix in the intake systems. on those systems if one oil line comes off or is plugged that cyl starve for oil and there is now way to tell until engine damage results(fuel is pumped independentaly from oil). This type system keeps pumping fuel no mater if a oil line or other failure exists.

PLEASE do some research and understand the pro's and con's before some one blindly tells you vro sux. p.s I run VRO on all my personal engines!!