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    Johnson 150 Rebuild/Remanufacture Guidance

    I plan on mounting my powerhead this weekend and am very close to initial startup. Please review my start up plan below and provide guidance. I realize, it is what I don’t know that will kill me! So what am I missing? Check spark on all cylinders using a 3/8” gap (in driveway). Check linkage...
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    Johnson 150 Rebuild/Remanufacture Guidance

    I have an old prop (14 1/2 x 19 pitch) I can sacrifice. A Google search shows a guy maintaining the blade end shape, but removing 1/3 of the blade length on all three blades. Is this what you suggest? Should I target a specific end diameter?
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    Johnson 150 Rebuild/Remanufacture Guidance

    I was planning on going to 50:1 in the gas tank for the first 25 gallons. Especially since I also rebuilt my VRO. Is this a good ratio and plan?
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    Johnson 150 Rebuild/Remanufacture Guidance

    OK, I'll switch out the XD100 and fill my VRO tank with XD50. Is it ok to switch back to XD100 after one VRO tank full (2-3 Gal.) for less smoke and less ash/carbon?
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    Johnson 150 Rebuild/Remanufacture Guidance

    Oil for Engine Break In: Over the past few years I have been running XD100 (100% synthetic) in my VRO tank. Is it OK to use the XD100 for the engine break in period?
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    Johnson 150 Rebuild/Remanufacture Guidance

    Thanks for the clarification. I wasn't aware of this tool. In fact, I'm surprised I didn't come across it when I was fighting with flywheel removal. This appears to be the Lisle version I found via a Google search (should have searched before asking for clarification). I will also look at...
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    Johnson 150 Rebuild/Remanufacture Guidance

    Havoc, thanks for your suggested tip. I am getting close to powerhead installation. It's been a long drawn out rebuild, but free time to focus on it is a bit tough right now. By "flywheel turner" I have a strap wrench to hold the flywheel. Is that what you are referencing? If so, I will...
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    Johnson 150 Rebuild/Remanufacture Guidance

    OK, I think I've got it. The timer base groove gets cleaned and new outboard lubricant applied. The clean retainer ring is snapped in the groove. The outboard lubricant ensures free rotation of timer base on retainer ring. The outside diameter of the bushing and the recessed lip in the...
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    Johnson 150 Rebuild/Remanufacture Guidance

    But it seems they refer to what you call the split plastic ring on the bottom of the timer base as the "retainer ring". The step after the Moly Lube step says: "Lubricate the timer base retainer ring (C) with Evinrude or Johnson Outboard Lubricant." then "Lightly compress the retainer ring (C)...
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    Johnson 150 Rebuild/Remanufacture Guidance

    Timer Base: I am reinstalling the timer base and my service manual tells me to: "Apply a light coating of OMC Moly Lube to the crankcase head bearing surface and the timer base bushing." Is the crankcase head bearing surface the machined outside diameter of the crankcase head that the timer base...
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    Johnson 150 Rebuild/Remanufacture Guidance

    The No. 33 Orifice Idle Air Bleed? Smaller or larger? No. 32 or 34 ?
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    Johnson 150 Rebuild/Remanufacture Guidance

    Just to clarify, my engine is stock (except for the .020" oversize bores) and I just purchased the Chris Carson Sport Reeds, no "stuffer" gaskets. Per the parts break down, I should have: High Speed Orifice No. 56C Orifice No. 29 Orifice Idle Air Bleed No. 33 Which ones do you recommend I...
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    Johnson 150 Rebuild/Remanufacture Guidance

    Carburetor Questions: Although this engine was running well even with a few scored cylinders, it has been 9 years since I rebuilt my carbs so I purchased three rebuild kits. In addition, although the original OEM reeds do not appear to be chipped, I can see light around a few of the reeds. I...
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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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