1984 Johnson 115 VRO questions

[ScottGW]

Fist off, thanks to all who have contributed to this forum, I have read tons of info that has been invaluable. I have searched for the anwers to these following questions:

I am going to put a water temp, and pressure guage, I need to know if I can just tap into the two sensors on the heads, or are they not setup for gauges? I know that they get hot the buzzer goes off, but will they read out to a gauge? (yes I know I will need to toggle from one sensor to another)

I know I have to te into the telltale for the pressure, but I heard of a different place that is more accurate on new engines, it that spot avaialbe on mine? Also, what shold the pressure read?

When I am trolling, somtimes a buzzer goes off, but as soon as I sqeeze the oil ball on the VRO tank it shuts off, could the VRO be going bad, or is the sensor suspect?

The carbs are perfectly clean, but when I am trolling, she is slightly rough, but, if I disconnect the lower carb linkage, she purrs like a kitten. my plugs are gapped @ .030 and are new, but not champion, should I change over?


I seem to be getting strong spark on all cylinders anf my compression 120 on all. I have a brand new racor on it and the gass it new.

This motor is on a 78 grady white 180 sportsman dual console and she screws like no other boat I have owned. I had her up to 32mph @ 4600RPM, I dtill haven't opens her up all the way in fear of blowing her up as she sat for 6 years. the water pump is new, the VRO is supposed to be new and everything esle seems great.

Sorry fro the long post, in anyone can help me with any of the questions, it would be great.

 

[ezeke]

Re: 1984 Johnson 115 VRO questions

The existing temp sensors are only off/on and should be left connected as they are. You will need to run new wires for your temp gauge and install the sensors that match it. They guages are sold as kits with all of the instructions that you will need.

 

[ScottGW]

Re: 1984 Johnson 115 VRO questions

The existing temp sensors are only off/on and should be left connected as they are. You will need to run new wires for your temp gauge and install the sensors that match it. They guages are sold as kits with all of the instructions that you will need.

So instead of removing the on/of sensors and replacing them with graduating sensors, I should do what, dril and tap my head for a new sensor? or is there a plug somwhere I am not seeing? If I have to drill, I will just replace the old sensors and still keep the buzzer by installing a temp activated switch from the new sensors to the buzzer. I don;t see the upside of machining the heads unless there is somthing I am missing?

 

[Captain Jeff]

Re: 1984 Johnson 115 VRO questions

As for the VRO the "no oil" sensor should be an internal part of the VRO that I dont think is serviceable. I would disconnect the oil line from the VRO and squeeze the oil bulb a couple times to make sure you're getting good oil flow and the line or filter isn't clogged. Also make sure your connections are good and you aren't sucking air into the oil line somewhere.

Next I'd say maybe your pulse limiting valve that powers the VRO could be gummed up and not giving enough pulse to pump oil and fuel. The diaphram in the VRO could be defective too but your main suspect is getting oil to the VRO in the first place and making sure there are no air bubbles coming through the line which would set the sensor off.

Yes, use the Champion plugs.

 

[ezeke]

Re: 1984 Johnson 115 VRO questions

The BRp and Teleflex temp guages tell you the temperature of the cylinder head.

Some of the heads like the V4 loopers have blind threaded receptacles for the sensors, and some, like most of the cross-flow V4 models do not.

If there is no receptacle then a Z bar is bolted using one of the cylinder head bolts, which then holds the sensor against the cylinder head. See fig 7 in the teleflex instruction here:

http://ww2.tflx.com/PDF/99625.pdf

 

[ScottGW]

Re: 1984 Johnson 115 VRO questions

The BRp and Teleflex temp guages tell you the temperature of the cylinder head.

Some of the heads like the V4 loopers have blind threaded receptacles for the sensors, and some, like most of the cross-flow V4 models do not.

If there is no receptacle then a Z bar is bolted using one of the cylinder head bolts, which then holds the sensor against the cylinder head. See fig 7 in the teleflex instruction here:

http://ww2.tflx.com/PDF/99625.pdf

exactly the answer I was looking for!

 

[ScottGW]

Re: 1984 Johnson 115 VRO questions

Just bought the sensor form ebay, I looked for it here but had no luck, The local thiefs wanted 32 dollars for it, I got it from an ebay store for 12 8)