Well, my “new” Commander 26 is still on the trailer, after I’ve worked on it much less than anticipated this summer. Sticking with the plan to to get the essential seaworthiness things done and use it for a season, but it will be next season.
At this point, both engines start easily and sound pretty good to my inexperienced ear.
Question. Port engine on muffs and garden hose. Does this look like reasonable flow? (1982 Merc 470)
On stbd engine, raw water pump isn’t putting out a drop, and I’m stymied. I’ve changed the impeller and pump housing and upper seals. When the leg was off I flushed all passages in the leg and engine, in both directions (no debris came out). The impeller must be turning because the prop was and the impeller/shaft key is in place. When checking leg was removed for the second time, I could see that the outlet side of the pump housing was still bone dry. The one remaining thing I can think of is to change the pump base and lower seals/gaskets. I left it in because it looked fine, and also thought that even if the the seals were leaking on the inlet (suction) side, I ran it in a barrel withe water level just above the pump, so I figured no air could be getting in — the pump would remain “primed”.
I just occurred to me while writing this that the exhaust pressure in the lower drive might be greater than the water pressure, so the pump might be sucking exhaust through leaky seals. So my next move would be to replace the pump base and seals after all. Any other ideas please?
Here’s a vid of port engine running. Any comments on engine sound/condition?
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And vid of water flow;
share.icloud.com
No vid of stbd engine because I shut it down as soon as observing no water flow.
Thank you everyone in advance!
At this point, both engines start easily and sound pretty good to my inexperienced ear.
Question. Port engine on muffs and garden hose. Does this look like reasonable flow? (1982 Merc 470)
On stbd engine, raw water pump isn’t putting out a drop, and I’m stymied. I’ve changed the impeller and pump housing and upper seals. When the leg was off I flushed all passages in the leg and engine, in both directions (no debris came out). The impeller must be turning because the prop was and the impeller/shaft key is in place. When checking leg was removed for the second time, I could see that the outlet side of the pump housing was still bone dry. The one remaining thing I can think of is to change the pump base and lower seals/gaskets. I left it in because it looked fine, and also thought that even if the the seals were leaking on the inlet (suction) side, I ran it in a barrel withe water level just above the pump, so I figured no air could be getting in — the pump would remain “primed”.
I just occurred to me while writing this that the exhaust pressure in the lower drive might be greater than the water pressure, so the pump might be sucking exhaust through leaky seals. So my next move would be to replace the pump base and seals after all. Any other ideas please?
Here’s a vid of port engine running. Any comments on engine sound/condition?
iCloud Photos - Apple iCloud
View, organize, and share photos and videos with iCloud Photos on the web. Changes will sync across your devices with iCloud.
share.icloud.com
And vid of water flow;
iCloud Photos - Apple iCloud
View, organize, and share photos and videos with iCloud Photos on the web. Changes will sync across your devices with iCloud.
share.icloud.com
No vid of stbd engine because I shut it down as soon as observing no water flow.
Thank you everyone in advance!
