Wow. I would expect you would have had substantially reduced flow out of the tail pipe. Did you notice any reduction?View attachment 154980 For what is worth, here are a few pictures of our exhaust elbow...
So any thoughts on why the elbow clogged in just 7 years? From the anecdotes I've seen that wouldn't be too bad for a Yanmar, but the Universal design seems to be more resilient. Much time idling?The elbow was new in July 2011.
About 350 engine hours ago.
Still looks new outside (pic taken just now), but I had opened up the side cap and hello it's stuffed with salt and junk.
I'll have it off shortly and scrape out, or replace. $180 at Toad.
2 hoses and the input pipe. Shouldn't kill me. Uh huh.
View attachment 154982
Nope. But generally run at 2200 rpm which is on the low end of rec cruise range. I like getting .3 gph. And that's 5.5 knots.So any thoughts on why the elbow clogged in just 7 years? From the anecdotes I've seen that wouldn't be too bad for a Yanmar, but the Universal design seems to be more resilient. Much time idling?
Racor clear. Just light Chablis in there. Filter recent. Took hose off just before secondary spin on, hose shot fuel into the coffee can when lift pump on. Secondary has always been new-clean when I changed it.Your problem is fuel. Your engine isn't getting it but you want to think it has something to do with the cooling system.
Thanks but I just explained that the filters are recent, and tested fuel flow is good. Fuel flow from that lift pump, which is behind the Racor in line so the fuel is filtered, is drastically more than this little 577cc motor could ever consume.You need to change the filter element. Looking at the fuel water separator bowl means nada.
You also need to check the lift pump filter and check for a pickup screen on the fuel intake in the tank as well as replacing the secondary filter.
Which I've done, apparently.You could check the most likely causes first or you could start tearing the engine apart replacing injectors and the fuel pump. Your boat, your rules. Keep us updated.
Les, please explain. How do the batteries come into play? Assuming a diesel with a mechanical lift pump. Doesn't need any electrical to run at all, so I'm not following how batteries would be a factor one way or the other.Prop + batteries = low rpm in gear
Batteries = not quite as low out of gear
Fresh water pump is 3 years old.How about the fresh water pump? At over 30 years old maybe that is losing efficiency?
It's not the batteries.Les, please explain. How do the batteries come into play? Assuming a diesel with a mechanical lift pump. Doesn't need any electrical to run at all, so I'm not following how batteries would be a factor one way or the other.
Brian
Load on the alternator to recharge them. At 90A it’s typically 2hp loss. If batteries are way down you’ll be in bulk with a full field from the regulator, and full load from alternatorLes, please explain. How do the batteries come into play? Assuming a diesel with a mechanical lift pump. Doesn't need any electrical to run at all, so I'm not following how batteries would be a factor one way or the other.
Brian