I installed my fwf system right into the pressure side of my seawater pump. This allows engine off Flushing, mounted the manifold in my transom locker with a garden hose quick connect in there. Itās SO easy to flush. But then again, thatās why I made it that way so I would t have to go in the engine room at all. Iām quite happy with the setup.
Thanks Tony,
New coolers already on the way. How does one test for a restriction?
Thatās a close call, you might want to consider a set of Double Doubles!
The Racors will collapse when fully loaded with water.
Edit: disregard
Backflushed my system. Went very smoothly using my freshwater flush setup. HXs all cleaned out now, with shortened zincs in place. Note to self: check pencil zincs more frequently, lol.
Thanks for the help all.
I also notice the zincs hit that bolt housing. Good call on trimming it.
Tony, I bench serviced all seawater components summer of ā19 per your protocols. I installed the fwf setup a few months after that service. I did pull the hx endcaps off to remove the broken zinc remnants…..thatās when I saw the zinc āresidueā
or whatever it is, sitting in the bottom of the hx. I vacuumed out most of it but saw some of it blocking the lower tubes of the HX.
Just not sure if I should leave it? Or do a flush to get rid of it.
Thatās kind of what Iām thinking, as my 391 was available with either gas or diesel. Where I was going was this is whether or not I need to install continuous duty blowers. But itās sounding like I donāt. I do have a long no-wake zone to get back to my house……so Iām able to cool things down. So I guess my procedure now will be to run the blowers on the way home and for a bit after I shut down.
I dunno if Iām the Rob (I think you mean Schepis, which is where I got the idea too, lol) whoās rig you copied, but I used a much thinner piece of rubber from Home Depot and it sealed up great.
Thoughts on this, Tony?
Got to run the boat today a bit. Due to tropical storm residual high water I was unable to get out of our no-wake zone creek and run WOT. So at the dock I started the motors first, then plugged one of the ports. I was not expecting the massive bubbling from underneath that then occurred, lol. It did, however, really quiet the noise down.
I then ran in the creek at about 1000-1200 rpm, which I usually hear an annoying drone from the exhaust while standing in the cockpit. The sound was muffled when I plugged the holes, but I also felt the rumbling from the exhaust now going mostly underwater…..so I’m not really sure what to think of that. I did still hear exhaust coming from behind the boat.
Then one of my plugs fell out and I was unable to retrieve as it went under someones dock with the wind…..so we called it a day.
Not very conclusive evidence.
Thanks Tony, I will try a bit harder to get that plugged. So I can do that at idle/slow speeds before I get on plane?
Soundown designed my muffler and supported me the entire step of the way ā highly recommend. And the exhaust is super quiet now.
Do you have any pictures or details on what Soundown built you? Talked again to them at the boat show and they claim they can make a much better muffler for my bypass tube than the Centek I have in there.
Iām still between putting a long Centek in my 6ā hose, or spending the $ for the Soundown bypass replacements. Soundown inlines for the 6ā hose are kinda out of the question…….gonna cost over $6k.
Thoughts anyone?
Thanks, good to hear. Do you have a picture or details on what they built you?
The guy at Soundown recommended replacing my bypass muffler with one of his. Iām not totally convinced though that all the noise is coming from the bypass. He told me to plug the bypass while on plane to narrow that down as the source of the noise. I tried to do that with a piece of pool noodle, but thereās a stream of water going right over that bypass port while on plane and I could barely get my hand over it, let alone shove something in there.
Hereās some pics. Lots of room for an in-line muffler
Thanks. It is not a lift muffler in the bypass. I actually have access to a suitable Centek muffler locally for $50. I kind of want to throw that in the line and test it before I spend the $800-ish for a new Centek. The guy only has 1 for sale….so its perfect for a test. The crummy part is cutting into the exhaust hose, and then having to spend a few hundred on a new 6ft run of hose if the muffler doesn’t satisfy. I’ll get some pics up.
I got ya. I looked at those and saw the rated power number and went off that. I guess I didnāt realize the high idle # was the one to look at for neutral rpms. Thanks!
So at wot he should reach 2800, correct? We got about 2500 today, but we know the bottom wasnāt clean.
I guess I ācouldā double clamp everything. I didnāt because none of it is below the waterline, and thereās not really any risk of flooding if a hose popped while the boat is unattended. I figured the only weak spot would be a hose bursting while running.
Which begs the questions, how much PSI is a seawater pump putting out? I figured the pumps are more for volume and not pressure? I donāt have a seawater pressure reading on my Vesselview.
Hey Kevin,
While the boat does reside behind my house, I do not run the AC when we are not onboard. I have a Home Depot dehumidifier that we pop in the sink and it does great. However, even running the AC fulltime does not prevent growth…..it actually accelerates it as the water flow is now providing fulltime food flowing by for the critters to live on. I put copper pieces from the hardware store in my strainer to combat growth, and they do a great job. Having said that, I do have to backflush one of my AC units semi-frequently as I get muck in the lines that degrade performance. I built another manifold downstream of my seawater pump that facilitates this a bit easier, and I actually plan on tying in my newly routed flush line into this plumbing to make it even easier.
I have used the AC line though to keep the system running on dockwater when we lost our seawater pump on a trip we took (shh….don’t tell the marina,lol)……had we not done that the weekend would have been ruined with no AC!
Finally got around to finishing my FWF setup and it works great!!! Got the manifold mounted in my transom locker, and put a QD on the hose end so itās super easy to just throw my hose on there and let āer rip. I also have it running to my existing FW setup that was OEM for the air conditioning and the genny.
