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Flappers ... Keep water out the engine from storms.
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marinettejoe
#1 Posted : Saturday, March 22, 2008 2:09:02 PM(UTC)
marinettejoe

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Flappers ... Keep water out the engine from storms.

If you've read Sorrydogs's sad tale, he lost a good 671 because of the lack of flappers. Storms and high waves push water into the exhaust and can back up into the engine. Who knew? Not me.... Will be buying them next week.

WD40 is a OK fix for water ... iff'n you know before you start.

Unzinced ships sink at slips. yep
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fastjeff
#2 Posted : Saturday, March 22, 2008 11:41:29 PM(UTC)
fastjeff

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I wouldn't rely on flappers alone. If your exhaust pipe is that low, you need to shift weight forward or add spacers to the risers to get them higher.

I recall that John Hall's old 32 footer--rafted right beside mine--had its exhaust openings virtully underwater where mine were way above. Not sure why.

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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Docsnow
#4 Posted : Sunday, March 23, 2008 12:58:01 AM(UTC)
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Client number eight, (alias Jeff) Angel

Seeing John Hall had problems with a low exhaust tube. Why did he take the flaps off his boat &
sell them to me they where damn near new looking & still working fine. I was wondering if we
could still get the exhaust dumps we use to use a million years ago when we teens to fool the
cops & run straight pipes on our 40 & 50 hot rods Whistle but in a 4" size & installed them just forward
of the thru hull tube when one left the boat for any extended time they could shut the flap then
open when the returned . One draw back would be U would surely have to remember to open
them before U started the engines. Just a thought Think

Norm,

BIGBigMs & DUX Live On Applause
http://www.picturetrail.com/gid23690601 Try it now there's music to listen to while U view the Big M's

http://www.PictureTrail..../index.php?clubID=20726 this one for the Pix club


 You'll have bad times, but they'll just wake you up to the good times you weren't paying attention to

Some people try to turn back their odometers.Not me, I want people to know "why" I look this way.I've traveled a long way and some of the roads weren't paved.
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MHYZHEN
#5 Posted : Sunday, March 23, 2008 2:23:47 AM(UTC)
MHYZHEN

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on my '64 the exhaust tubes exit the boat under the waterline also, i always wondered if that was a "muffling" technique used by marinette....

i was thinking of making a set of "caps" to use over the outlets for when im not around, or even something like a big rubber corks to plug the outlets, with "remove before flight" stringers attached and ran up over the transom to remind to remove......that would be a pain in the butt though, and a serious pain with a swim platform......
i like norms idea of the exhaust dumps.....hey, ya dont need to be an oldtimer to know about, or have used those !!

what about something like a vernalift muffler ??
http://theboaters.com/bo...te/express/1964/MHYZHEN

One more busted knuckle and i'll have a complete set !
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jralbert
#6 Posted : Sunday, April 20, 2008 5:45:48 AM(UTC)
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Vernalift:
We had a discussion on these a few years ago and I recall that they weren't made any more and when they were, were quite costly
Joel Albert, Potomac MD
"Charlie B" - 1988 32' FBS
Twin 318's/FWC/16x15 nibral props
docked Deale, MD
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DiverDennis
#7 Posted : Thursday, July 24, 2008 5:48:07 PM(UTC)
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Put them on last year. Thanks.

Surface Interval
1975 28' Express, Single M360
Specs: http://www.boatm8.com/my...amp;page=boats&arr=0
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fastjeff
#8 Posted : Thursday, July 24, 2008 10:56:56 PM(UTC)
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The important thing here is to LISTEN to the engine as you attempt to start it after letting it sit overnight (or longer). If it sounds like (this on the starter), RRRRRRRRR, you're okay; light her up. But if it does this, RRRR-hesitate-RRRR--hesitate, then do NOT try to start it! There's water in a cylinder and, since water doesn't like to compress, you can blow a head gasket, bend a rod, blow a piston or even blow the head off the motor!

Two full revolutions of the motor is all you need.

Note: If your motor is one that fires instantly you'll need to install a "bump" circuit to wheel it over without allowing it to start. I shudder to think of those new EFI motors that fire at the turn of the key!

Jeff

PS: You folks that only run your boat from the flybridge need to be especially careful on first start up since you can't hear as well as us "lower helm runners."
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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dougrose
#9 Posted : Friday, July 25, 2008 12:56:06 AM(UTC)
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I always start and shut down from the lower helm, I can hear the engines better. Boy can I hear them.

Since Sorrydog's sad tale, I hold down the "stop" button which turns of the fuel and then crank as recommended. Then I can let up on the button to start.

You could do this with a gas engine if you wired the start switch correctly, to allow starter with no ignition. Don't know how to wire this, but a pushbutton that kills the spark would work.


1975 32' Flybridge Sedan, twin Perkins 6-354 diesels, 1:1.53 velvetdrives, 16 X 19 props. Merritt Island, Florida
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jhall767
#3 Posted : Friday, July 25, 2008 1:28:29 AM(UTC)
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Fastjeff wrote:
I wouldn't rely on flappers alone. If your exhaust pipe is that low, you need to shift weight forward or add spacers to the risers to get them higher.

I recall that John Hall's old 32 footer--rafted right beside mine--had its exhaust openings virtully underwater where mine were way above. Not sure why.

Jeff


Never had any problem with my exhaust, hydro-lock or anything like that (unlike some people :) . Only had flappers on there because it was required for the warranty on the repower. As I recall the exhaust was just above the waterline at rest. No water stayed in the tube. However I had a good 20" of drop from the elbow to the waterline. Plus 8' of run. Jeff maybe you were thinking of the underwater exhaust system I put on?
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fastjeff
#10 Posted : Friday, July 25, 2008 1:37:38 AM(UTC)
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I seem to recall being in the water behind your boat (at the Port Deposit races, remember?) and noting that your exhausts were several inches lower than mine. I guess they were not actually IN the water, though (unless I was, ah, sitting on your cockpit!)

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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jhall767
#11 Posted : Friday, July 25, 2008 4:03:01 AM(UTC)
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Fastjeff wrote:
(unless I was, ah, sitting on your cockpit!)

Jeff


That's scary. I was going to say exactly the same thing ....

John
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SORRYDOG2
#12 Posted : Friday, July 25, 2008 4:06:09 AM(UTC)
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Fastjeff is dead on it AGAIN!! Dont reley on FLAPPERS ONLY!! Raise your exhaust RISORS!! its okay for exhaust to be in water if has to be, like mine. Install $300 camera with micophone in engine room to HEAR ENGINES TURNING OVER!! You see them also, if you blow a oilcooler line as I did and shut them down before it registers on the gauge!! Some sarters I have found out, my 671 detroits included have enough torgue to turn over the engine, even if you have water in the cylinder!! Check your starters on Lehmans Doug. Recentley had 12 volt bilge pump fail on good side of my boat. 120 volt kicked in,but stll had boat heeled over.as it did on the bad engine side. No storm this time to rock boat. Instead of trying to start good engine, hired mechanic to come down and turn crank by hand!! No water!! Started rite up. SCAREDDOG
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