robin1731 wrote:I've been saying that for years.
JamesPal wrote:I'm on my third restoration. Never had a carb blockage or leaky petcock. I always line my tanks with Caswel, rebuild my petcocks with Randak seals.
Sidecar Bob wrote:Fuel hydrolock is caused by a leaking float valve, not a leaking petcock. A leaking petcock can't contribute to hydrolock unless the petcock was turned OFF when it happened and (on a 'Wing at least) the tank was at least half full (below that fuel can't flow into the carbs by gravity) and even then if the float valves are all doing their jobs nothing will get past them.
Shutting off the petcock will prevent fuel from flowing into the system and past a leaking float valve, though.
And Hydrolock isn't necessarily caused by fuel, either. A few years ago I tried starting my 'Wing the first time in the spring to find that it wouldn't turn over and when I removed the plugs I found one cylinder full of coolant. (Since "hydro" means water this is true hydrolock).
I've been thinking about this since I found the bent rod in the 1100 engine I started working on last year: My old (1000) engine was hydrolocked at least twice (if you find fuel in the plenum check the carb to plenum seals!!!) and, while it is still smoother than the CX's v-twin, I don't think it is as smooth as it was 20 years ago. And its mileage fell off noticeably about when the carb to plenum seals failed, which could be consistent with poorer compression resulting from the piston not reaching TDC.
I'm thinking it might be interesting to check the compression before I swap in the new engine unless there any other way to determine if a rod is bent without removing the heads.....
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