Hello, everyone.
1979 Newport MKII, 30 ft with A4. Immaculately maintained by the previous owner. I, sadly, only had about half the responsible ability as he did and let the poor girl sit for about a year and a half while deployed. Now bringing back to life starting from a no start condition with a good starting motor.
Cooling line blockage in exhaust manifold cleared and fully operational.
Spark plugs and wires replaced.
Thermostat housing gasket, exhaust manifold gasket, valve galley gasket replaced.
Carburetor removed and cleaned pretty thoroughly, but not quite 100% of Moyer recommendations (where do I get one of those dowels?).
Failed thumb compression test on ALL FOUR CYLINDERS. Uncovered valve galley plate and behold multiple stuck valves (see photo). Much penetrating oil and the allen wrench trick and I successfully tapped them down.
Hooked up a fresh can of gas to rule out bad gas.
Changed the water fuel separator.
And finally, she runs.
However! I have zero compression in number 1 cylinder, and believe I didn't unstick the valve there so I'll be going back now that it's soaking in oil.
Also, she stalls out when I try to go into forward gear and I have a lag when throttling up. Reverse also not a happy engine.
My questions:
1 - Would a single cylinder not firing account for the stalling when going into gear and the lag when throttling up?
2 - While obviously not GOOD for it, would 1.5 year old gas be this much of an issue? Worried about sediment, I suppose? Also, no discernable change when I used the new gas from the can.
3 - Just how finicky is the carburetor? Because while I feel I did a thorough job cleaning it, there seems to be a lot of finger pointing at the carb for this kind of thing.
Heading back this weekend to get back to work, just trying to do my homework. I have the overhaul manual and extensive records on the maintenance I can reference while I'm there that go back to the original purchase. Going to unstick the valve and see what happens. There is also a LOT of soot in that cylinder, presumably from burning gas with no compression while I was troubleshooting.
- Jo
1979 Newport MKII, 30 ft with A4. Immaculately maintained by the previous owner. I, sadly, only had about half the responsible ability as he did and let the poor girl sit for about a year and a half while deployed. Now bringing back to life starting from a no start condition with a good starting motor.
Cooling line blockage in exhaust manifold cleared and fully operational.
Spark plugs and wires replaced.
Thermostat housing gasket, exhaust manifold gasket, valve galley gasket replaced.
Carburetor removed and cleaned pretty thoroughly, but not quite 100% of Moyer recommendations (where do I get one of those dowels?).
Failed thumb compression test on ALL FOUR CYLINDERS. Uncovered valve galley plate and behold multiple stuck valves (see photo). Much penetrating oil and the allen wrench trick and I successfully tapped them down.
Hooked up a fresh can of gas to rule out bad gas.
Changed the water fuel separator.
And finally, she runs.
However! I have zero compression in number 1 cylinder, and believe I didn't unstick the valve there so I'll be going back now that it's soaking in oil.
Also, she stalls out when I try to go into forward gear and I have a lag when throttling up. Reverse also not a happy engine.
My questions:
1 - Would a single cylinder not firing account for the stalling when going into gear and the lag when throttling up?
2 - While obviously not GOOD for it, would 1.5 year old gas be this much of an issue? Worried about sediment, I suppose? Also, no discernable change when I used the new gas from the can.
3 - Just how finicky is the carburetor? Because while I feel I did a thorough job cleaning it, there seems to be a lot of finger pointing at the carb for this kind of thing.
Heading back this weekend to get back to work, just trying to do my homework. I have the overhaul manual and extensive records on the maintenance I can reference while I'm there that go back to the original purchase. Going to unstick the valve and see what happens. There is also a LOT of soot in that cylinder, presumably from burning gas with no compression while I was troubleshooting.
- Jo
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