Home › Forum › Ask A Member › 1962 Johnson 5.5 HP (Model CD-19)
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JACQUES.
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October 11, 2026 at 10:09 pm #329920
Darn thing is perfect but does not run right. Looking for people smarter than me and ideas. Fully rebuilt it, but can’t get it to run without missing, which is what prompted the rebuild. Runs better cold then seems constipated. Pretty much new everything. Thinking something odd/unusual. I don’t have a way to check the rebuilt carb, but did two and they run the same. Even changed the reed valves, puddle valve. All the normal stuff like rebuilt mag. Verified the new mag components. Good compression. Ideas please …
October 11, 2026 at 11:30 pm #329921Did you actually test the condensers using a proper condenser tester? Even new caps can be bad
Joe B
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October 12, 2026 at 8:16 am #329929Anyway you can post a video of the engine running/misbehaving? I know it is tough to do here, but you can post a link to youtube or something like that.
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October 12, 2026 at 8:30 am #329930warm constipation points to coil or condenser reaction to heat more than phyical problems…. but ….any improvements if you pump the primer bulb when it falters..
is it pumping water ok ? does the PH get to hot ? check with a IR gun thermostat test ok ??? salty crudded engine or freshwater
can you run it in the dark… look for arcing
got the free service manual…? to help out
https://www.socalaomci.com/library/johnson_service_manual_10th_edition.pdf
Joining AOMCI has priviledges 🙂
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October 12, 2026 at 10:37 am #329935I assume that since this motor requires powerhead removal to service the impeller…..that you have had the PH off. Sometimes when all else fails you can look for obstruction (carbon, rodent debris etc.) in the exhaust housing. Restricts breathing.
Like I say; I assume that has been checked during impeller service but I mention it here for others’ benefit.
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October 12, 2026 at 11:17 am #329936fyi…if not done yet
http://www.youtube.com/watch?v=EY2HrEdp5vg
http://www.youtube.com/watch?v=ga1Cjymj6ms&feature=youtu.be
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