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    18HP NSF-18b Wont Start

    Engine is a 2002, Does not start without starting fluid. Bought from my father in law and it seems it was like this since new. Its been used a few times and stored in my shed for many years with the carb drained. Last night tried to work on it. Seems to be a fuel problem, even after it starts...
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    1959 RD-21 35HP Johnson

    I rebuilt the engine last year and it runs great, however today on the water it felt like the prop was slipping under high load and when the boat planes out. It was almost as if the engine would go into neutral but this was not the case. You could reduce the throttle and find a spot all was...
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    Thunderbolt IV coil wire arc - What parts?

    I am looking for plug wires and a cap and rotor because the coil wire on one engine is arcing at teh coil. Even when i put a new wire on so i believe the cap/rotor may be worn. There seems to be many diff part numbers for them and its confusing. I have a 1989 carver with twin 350 5.7 small...
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    RD-21 piston size?

    What is the stock bore and piston size of a 1959 35hp RD-21
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    1959 RD-21 35HP Johnson PARTS? Hard to find

    You guys have been a big help so far. My findings show the top cyl needs a rebuild. 30PSI, compression ring is stuck in the piston, bottom rings are broken in 2. Some scores in the cylinder walls. I am looking to bore it .020 or .040 over, install new pistons and rings...however, I cannot find...
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    1959 RD-21 35HP Johnson Power Head Removal

    Compression test shows 30 in one hole and 90 in the other. Add oil and they both are at 120. It seems i need to remove the powerhead to see whats going on in the top piston. Is their an easy way to do this? I rather remove the piston without doing this but it doesnt look possible. Anyone have...
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    1959 35HP Johnson won't start

    The engine died a few years ago. Was running then would not restart after I turned it off. I put new points, plugs, condenser, coils and wires. Set the gap and it has a really nice spark. It wants to start but it just fires and dies after a few puffs. I cleaned the carb but that looked fine...
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