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    Head Covers, Gasket Sealent or Not?

    Ready to install head covers on '78 Johnson, 150 hp rebuild. Should I use gasket sealent or not? The gaskets are as wide as the cover but actually contact the two surfaces very little. I just dont see what good it would do to spread the sealent all over the gasket. Maybe just on the edges? Let...
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    Stripped Cylinder Head Bolt Hole, Helicoil or Larger Bolt

    Rebuilding '78 Johnson, 150 hp, cylinder head bolt hole is stripped. I've read through several threads most recommend a Helicoil. What I don't understand is if I have to retap for Helicoil why not just retap for a larger bolt and thread? I'd rather trust a machine shop to do it but I have it...
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    Johnson Carb Rebuild. Is this Right?

    Does this look right? '78, Johnson, 150 hp. When I took off my carbs to rebuild they did'nt have this little clip or spring on the needle valve. This is my best guess to where it goes. You are looking at the carb upside down, the seat is on the bottom and the float is on the left. Can someone...
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    Gasket Sealent?

    I'm rebuilding '78, Johnson, 150 hp. Is it necessary to use Gasket Sealant, any where? Like Bypass Covers, Head Gaskets, Head Gasket Covers, Intake Manifold, Exhaust Cover. Thanks.
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    Rebuild questions, '78, Johnson, 150 hp

    Hello, I have several questions about re-assembling my '78, Johnson, 150 hp, I had all six cylinders rebored and I have six new Wiseco pistons. First, is there somewhere I can find the ring gap for the pistons and motor? I tried the Wiseco website and it wasn't to specific. Second, is the rubber...
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    Cracked Cylinder Block? Pictures, What do you think?

    Hello, I am planning on rebuilding '78,150 hp, Johnson. #3 piston and cylinder are scored, I have opened up the crank case and found what might be a crack in the cylinder head for #3, see pics. I also included a picture of the cylinder block for #5 to compare. I'm not sure if this is a crack or...
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    Power Head Removal, '78, 150 hp, Johnson

    Does anyone have any ideas for separating and removing the powerhead from exhaust housing on '78, 150 hp, Johnson? It seems to be stuck on there and I'm afraid to wedge anything between the two. Do I absolutely need an engine hoist? I'm sure I have removed all the bolts. Thanks.
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    Pulling Flywheel, threads maybe stripped,1978 Johnson 150 hp

    Hello, I am getting ready to pull the flywheel on 1978, 150 hp, Johnson. I need to get a puller, so I was taking a look to see what size I might need then go to Harbor Freight or Auto Parts Store and see what I could find. As I understand I will need to mount the puller in the three holes in...
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    Can A Cylinder Be Scored So Deep That It Cant Be Rebored?

    Have a 1978, 150 hp, Johnson, pulled the heads and found #3 cylinder is deeply scored, looks like a ring came apart. I decided to tear it down and completely rebuild (never did this before but I'm looking forward to it).Then I thought, what if I go to all this trouble and find out that it's...
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    '78 johnson 150 hp, low compression on one cylinder

    Hello, if anyone could help or clarify. I bought a '78, 150 hp Johnson. Hasn't ran for at least 4 years. I did a compression check and found #1 100psi, #2 90 psi, #3 60si, and the rest right at 100psi. I understand from reading a bit that the next move would be to remove at least the one...
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    Weak or intermittent spark on one bank, Power Pack Test '74, 115 hp Evinrude

    This concerns a post I had started previously, my 74, 115 hp, Evinrude barely runs after idling for about 15 minutes. Put inductive timing light on wire for each cylinder, 1 & 3 seem fine, steady strobing light. 2 & 4, the other bank, the light seems intermittent and weak. Could someone please...
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    1974 Larson Shark w/ '74 115 HP Evinrude Restoration

    Just wanted to share some pics of my Shark, replaced transom, stringers, floor, carpet, seats, control cables, water pump, instruments. She looks like brand new and ran that way too for the last three years, however, we are currently having some ignition trouble. I've posted another thread about...
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    '74 115 hp Evinrude Idled fine for almost 15 minutes then barely runs

    Last year my '74 115 hp Evinrude ran great 99.5% of the time, however it would occasionally run as if it were cold or wasn't getting fuel, it was getting more frequent then my last outing on the water it ran super for about 20 minutes then started to stammer as if it was not getting fuel. I...
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