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    CDI Electronics and AGM Battery Compatibility

    Can I utilize a sealed 12-volt NorthStar AGM battery with the CDI Electronics system I have in my 1986 Johnson 150 HP outboard (J150TXCDC)? I believe this engine has a 9 AMP charging system. I vaguely recall seeing a post somewhere that this is not recommended by CDI Electronics. Is this true...
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    Starting Delay 1986 Johnson 150 HP Crossflow V6

    Recently, when initially cold starting my Johnson (J150TXCDC), The starter doesn’t engage/"turn over" when the key is first turned. On second try the starter engages immediately and starts the engine. The starter engages immediately on all subsequent starts for the day. I replaced the starter...
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    Kill Switch Problem 1986 Johnson 150 J150TXCDC

    I realized my engine was not stopping when the safety lanyard is removed from the Kill Switch. Points of interest: The Kill Switch was working last summer Upon identifying the problem, I thought for sure the Kill Switch failed, given this is a 1986 Johnson 150, and I replaced the Kill Switch...
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    VRO Failure & Life Expectancy

    The VRO pump, on my 1986 Johnson 150 (J150TXCDC), failed after only three summers (15 months) of use. While trolling, the engine stalled and I had to use the primer bulb to fill the float bowls. The engine would not continue running unless I actuated the primer bulb. Experiencing this years ago...
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    1986 Johnson 150 HP Crossflow V6 Rebuild - Now What?

    I completed the below work on this 1986 Johnson 150 HP crossflow V6 engine (J150TXCDC) in the off seasons over the past two to three years. It has been running very well for me since the engine was fired up after the rebuild in the summer of 2021. The question I have, after investing all this...
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    OMC Electric Primer Lever & Service Valve Replacement - then Issues

    This spring I noticed the red lever on my electric primer was cracked and leaking fuel when the primer was activated. I replaced the lever and primer cap with a Sierra Service Valve Kit p/n 18-7044. Problem solved until I went to use the Schrader Valve for fogging the engine this past weekend...
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    Continental Trailer Leaf Spring to Torsion Axle Conversion

    I am interested in converting my Continental Trailer (C9-72B-2800) from leaf spring to torsion axle. My trailer information is as follows: GAWR = 3,400 lb. C channel trailer frame dimensions: 1 1/2" x 4” External width = 72” Dimension from bottom of bottom of C-channel to centerline of...
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    OMC Remote Control Lubricant Help

    I am disassembling, cleaning, and re-assembling a 1986 OMC Remote Control (P/N 173646) I am looking for guidance on what lubricant I should use for the various mating interfaces: Metal on Metal Contact (cams etc.) and Nylon Washers: Would OMC Triple Guard Grease be acceptable? Spring Loaded...
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    1986 OMC Remote Shift and Throttle Binnacle Control

    I currently have an old 1986 OMC binnacle control. Given the age, I am cleaning up and lubricating the binnacle control. I plan on purchasing new control cables to replace the original OMC OEM 18' cables (OMC part number 173118). Is there any functional advantage to the Teleflex TFExtreme...
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    1986 Johnson 150 J150TXCDC Gearcase Seal Replacement

    I do not currently have any water leaking into my gearcase and my gearcase is functioning fine. I have not found any metal filings on the drain seal magnet during the annual fluid change over the 20 years I have owned this engine. However, as a preventive maintenance item, I am considering...
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    New VRO Fails No Oil Alarm Test

    I replaced the VRO on my 1986 Johnson 150 (J150TXCDC) with new OEM P/N 5007423. This is a 4 wire VRO. However, when performing the VRO alarm test by disconnecting the oil inlet hose, I do not obtain a No Oil Alarm. Note: I have 75:1 premix in my tank and ran the boat in neutral at idle for at...
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    Recirculator Hose Failures OMC

    I have experienced four recirculator hose (1/16”) failures on my 1986 Johnson 150 over the past 18 years. All four occur in various locations where the hose attaches to one of the barb fittings on the intake manifold check valves. The failure is always a slit along the hose from the hose end...
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    No Oil Alarm Occurrences on Rebuilt 1986 Johnson 150 J150TXCDC

    VRO No Oil Alarm Occurrences after VRO preventive maintenance rebuild with OMC/BRP Air Motor and Gas Diaphragm rebuild kits. No previous problems with VRO (4 wire) since it was installed in 2008. The No Oil Alarm occurred randomly four times over 60 gallons of fuel burn. Occurs shortly after...
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    Johnson 150 Rebuild/Remanufacture Guidance

    I need some rebuild/remanufacture guidance for a 1986 Johnson 150 HP crossflow engine I own. The model number is J150TXCDC. I have owned this boat (1986 Boston Whaler Outrage) and motor set up since 2003. The engine has over 1,200 known hours on it. It has one slightly scored cylinder...
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    1986 Johnson 150 HP, Model J150TXCDC Spark Plugs

    My OMC Service Manual recommends Champion Spark Plug QUL77V with the alternate being UL77V. What is the correct plug for this engine? I have been running the Champion UL77V surface gap plugs over the years. My use varies between trolling and running around at 3,000 to 3500 RPMs, not at high...
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    Fuel Leak around Carburetor Bank on 1986 Johnson 150 HP Outboard with VRO

    I have a fuel leak that seems to be at it's worse after I turn off the engine. I am having a difficult time identifying the source of the leak. It seems to be coming from the carburetor bank and related fuel and recirc hoses. I rebuilt the carbs approximately 4 years ago and the engine runs...
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    1986 Johnson 150 (J150TXCDC) Fuel & Oil Recirculation Line Clamps

    I am experiencing a “slow drip” gas & oil leak in front of the carburetor bank on this engine. I can’t easily detect the source, but want to improve the hose clamp situation. Currently, the clamp usage adheres to the OEM Diagrams. It is a mix of BRP Snap Clamps and BRP Cable Tie Clamps...
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    OMC Temperature Switch Removal 1986 Johnson 150HP

    Johnson 150 HP, 1986, Model: J150TXCDC 1. How do I remove the Cylinder Head Temperature Switches from each head? They are functional, but I want to remover them to have my head milled flat. I removed the head cover, and loosened broke the rubber grommet free with PB Blaster, but I am unable...
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    Removing Cylinder Head Bolts and Cover Bolts on a 1986 Johnson 150 HP (J150TXCDC)

    After additional research on this site I believe my cooling system deflectors may be causing an overheating condition. I am now getting an overheat warning only when I run over 4,000 RPM. I replaced the water pump, thermostats, pressure release valve, and springs, two years ago, and believe...
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    1986 Johnson 150 V6 Cooling & Cylinder Head Temperature Model #J150TXCDC

    I installed a new water pump kit, new thermostats, new pressure relief valves, and related seals. I did not replace the pressure release valve seat. I fired the motor up on the trailer at a local ramp, but I can?t run in the shallow water at this location. I now have a strong telltale and 6...
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