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    Johnson 90hp v4 cylinder wear

    Thought I show u guys cylinder 3 is 6 thou bigger than 4. The factory ring end gap is over the top end specs by 10 thou. I got oversized rings that seats perfect in the cylinder & can gap to book specs. My only concern is am I going to get blow by since their would be more of a space between the...
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    90hp v4 starboard cylinder overheat

    thought i showed u guys what I've discovered in the block. It appears that the cylinders worn out over the years & cylinder 1 was the first to start loosing compression not burning right causing the mixture to leak pass the rings & overheat that entire side of the block. I am left to...
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    Johnson 90hp v4 blown lower crank seal.

    Hey guys thought I share a pic on what the exhaust adapter looks like after the seal started to leak & the oil that was left over from poor combustion & pushed out the exhaust ports. Also the ripple effect in the pan from the pressure spewing out.
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    90hp v4 Johnson barb ports on intake manifold

    Hey guys I was just wondering if someone can tell me what’s the purpous of these ports. It only lets air out & not in. Two of them under the top carb connects to a tee that goes to a port on the side of crankcase that feeds cylinder 3. One goes higher up to cylinder 1 closer to where the 3...
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    The cycle of 93 Johnson 90hp piston

    Hey guys I was just wondering if anyone knew the firing order of the piston for a 93 johnson 90hp. Its an VRO engine with 4 cylinders 2 on each side. I know that the crankcase is split in two half & just wanted to understand how the vacuum to the fuel pump is drawn. thanks
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    outboard nipple question.

    Hello guys can someone tell me what's this nipple for? it seems to have a rubber boot wire tie around it. I thought it was a grease point @ first but then thought this part of the lower unit is submerge in the water or could it be a grease point & i have to cut the wire tie to get to it?
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    help removing propshaft.

    Hey guys I am trying to remove my prop shaft to check the clutch dog for wear on the lobes but it seems to be stuck. Any idea what could be holding it inside? the engine is a 2013 merc 40hp 4 stroke .
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