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    System Check Conversion - Oil Tank Sender Question

    I am converting my 1990 Johnson 150 to system check a piece at a time. I've got everything except a new oil tank sender. My question is, why do I need to replace it? What's different between the old float switch and the system check version?
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    Sea Drive - System Check Conversion Harness

    I have a 91 Johnson/OMC 150HP 90Deg Cross V Sea Drive Engine and am considering doing the System Check Conversion. I've been told that putting in a new harness should not be attempted because of the Sea Drive unit. The question is why is a new harness required for System Check? My current...
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    91 Johnson 150 wiring questions

    Here is a picture of the wiring diagram from my 91 Cross V engine. What is the bullet connector for at 1? What is the part shown at 2? Why is a four wire VRO shown? I thought that in 91 they all had a 3 wire?
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    System Check Conversion

    I have a 91 Johnson 150 90 Cross V that I would like to convert to System Check. I need to replace my VRO, tach and oil tank pickup/sender unit anyway so I might as well make the conversion. I will replace my 3 wire VRO with a 4 wire VRO. The question is these all these parts have probably...
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    Beep-Beep-Beep

    The alarm is beep-beep-beep with the engine off and stone cold. If I disconnect the oil tank or VRO sender it stops. The local shop said I need to replace both of them to the tune of $550. Are they both bad or is just one of them bad? How can I test these senders to tell which one is bad...
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    What Year Is My Johnson 150

    I have a Johnson 150 with a Sea Drive and there is no model code anywhere on the engine. I was told by the previous owner that it is a 92. I ordered a 92 manual and it does not match. If anyone can tell me what year it is from these pictures, I sure would appreciate it so I could order the...
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