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    Johnson 150 Rebuild/Remanufacture Guidance

    Alan, I bought the WSM gasket set from Jason. The cylinder head gasket has "Motor Gasket Molls" printed on it. It's definitely blackish with a smooth semi shiny surface. The surface feels a bit waxy, but I'm not seeing the green color. Do you think these are the silicon impregnated ones?
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    Johnson 150 Rebuild/Remanufacture Guidance

    In regard to the cylinder head gaskets, my service manual specifically states no sealant. By "lower edge" are suggesting gasket sealant on the outer edge of the gasket (not metal cylinder sealing ring) ? Is this an agreed upon workmanship change for these old crossflows? I'm curious . . .
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    Johnson 150 Rebuild/Remanufacture Guidance

    Thanks for the quick reply. Yes, this helps in understanding the interface and purpose of the Loctite 518 to account for very minor irregularities. I just now used a 24" precision machinist straight edge on both halves. I checked along the bolt length on each piece and diagonally across...
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    Johnson 150 Rebuild/Remanufacture Guidance

    Crankcase Sealing: Do I use a 1/8" bead or even coat of Loctite 518 on crankcase mating flange? The OEM Service Manual states: "Apply OMC Gel Seal II to the crankcase mating flange of the cylinder block. The application must cover the flange evenly and consistently without being excessive...
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    Johnson 150 Rebuild/Remanufacture Guidance

    OK, help me out, by peanut butter do you mean OMC Gasket Sealant or equivalent on bolts that torque under 180 in lbs?
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    Johnson 150 Rebuild/Remanufacture Guidance

    I'm looking for some guidance on the use of a sealant on bolt threads and shanks for my rebuild. The last time I had my cylinder heads off, I believe my investigation led me to no sealant use on the cylinder head bolts to ensure accurate torque values. Do I use the Loctite Aviation Gasket...
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    Johnson 150 Rebuild/Remanufacture Guidance

    Alan, your process worked amazingly well! After approximately 10 minutes in a preheated oven the bearing dropped out. The frozen new bearing dropped right into the bottom of the head. It was somewhat painful to remove the Torrington AJ47495 OEM bearing and replace it with this Pro Marine USA...
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    Johnson 150 Rebuild/Remanufacture Guidance

    OK, I received my used temperature sensor and understand what you mean by just stuffing it in. It has a rubber plug/seal that holds the sensor against the bottom of the counterbore once you put the cylinder head cover in place. Thanks!
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    Johnson 150 Rebuild/Remanufacture Guidance

    The old one had a broken wire and it was difficult to remove. I ended up braking the center stem off of the sensor disk and found an EZ Out that was a force fit in the shallow hole. It then twisted out with a T Handle. I believe corrosion held it in place. It isn't a force fit when you press...
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    Johnson 150 Rebuild/Remanufacture Guidance

    I was not aware of this evinrudeparts.ca site, but was pleasantly surprised that although they did not have a new temp switch they provided me a few dealer names and phone numbers that showed availability. Albeit, a used option. I picked up a used bench tested temp sensor. The manual advises...
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    Johnson 150 Rebuild/Remanufacture Guidance

    James R, Thanks for reaching out. I already had my cylinders bored .020" oversized and am starting to put the engine back together. However, I am trying to buy a few parts I need. I may give Pro Outboard a call to see if they have a temperature switch for the cylinder head. Thanks
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    Johnson 150 Rebuild/Remanufacture Guidance

    Yes, I was trying to understand whether there were other replacement/compatible part numbers. I can't seem to find the two above p/n's as new items. evinrudeparts.ca does say "Price: Call Us". I will try that.
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    Johnson 150 Rebuild/Remanufacture Guidance

    I am in need of a temperature switch for one of my cylinder heads. I broke the wire off the original one. The original OMC p/n was 378176. I understand that p/n was replaced by p/n 0386686. Is there a source for these or a suitable replacement? Thanks for all of the guidance!
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    Johnson 150 Rebuild/Remanufacture Guidance

    I just found the seal in my WSM gasket kit. It is metal, but has a green finish on the outside diameter. So are you saying no gasket sealant? I wish I would have found the WSM bearing number first. I already ordered from outboardmotorparts. Hopefully they are the same quality.
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    Johnson 150 Rebuild/Remanufacture Guidance

    Thanks for the quick response Faztbullet. I will return the new one with the cage corrosion and buy the bearing from outboardparts.com (the only source I identified for the bearing). I'll also replace the seal. Do I use gasket sealer on the new seal and install similar to the method used on...
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    Johnson 150 Rebuild/Remanufacture Guidance

    My OEM Service Manual states, "If the upper crankcase head bearing is damaged, crankcase head and bearing assembly must be replaced". Given this guidance, I ordered a new head assembly, since I am replacing all crank bearings, but it came to me with corrosion on the bearing cage. Investigation...
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    Intermittent Alarm

    You can test the fuel restriction alarm by simply putting a kink in your fuel line. This will give you a continuous alarm until you release the kink.
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    Johnson 150 Rebuild/Remanufacture Guidance

    Question, my wrist pin replacement bearings are caged, not the original individual needle bearings. Do I use the thrust washers with the caged wrist pin bearings?
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    Johnson 150 Rebuild/Remanufacture Guidance

    I ordered OMC Gasket Sealant online, but received Loctite Aviation Gasket Sealant p/n 1525607. Is this an acceptable/recommended equivalent?
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    Johnson 150 Rebuild/Remanufacture Guidance

    OK, I'll break the outside edges with a medium India stone. Is that acceptable, or do you have a better process?
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