?

Nothing should be able to drip into the crankcase but if the head
gasket is blown or the heat exchanger has corroded through, water will
get in that way.

Okay, let's break this down.

Too much stuff in the crank case that can't get out and can't be
compressed (not air) will get forced into the cylinders. That also
makes the engine struggle.

White smoke is generally associated with water in the fuel or too much
diesel. If the exhaust smells like diesel, probably too much diesel.

If detaching the breather hose makes it run great (apparently, even
though there's still obviously a problem), then you're probably right,
it's probably clogged in the intake. Is there a check valve (small
plastic disc like thing) in-line somewhere?

Diesel in the oil is better than water in the oil, but diesel is far
too low of viscosity to lubricate worth a damn, so you really need new
oil before you run for more than a minute. Can you save the engine
for emergencies until you get this sorted out?

It's possible that if the breather has been clogged for a long time,
all of the fuel/air mixture that blew by the piston into the crankcase
(and normally would be vented back into the air intake) was trapped in
the crankcase long enough that the fuel got deposited there and air
eventually forced its way out (eg, through the dipstick opening).

At this point, these would be a really good idea:

New oil

Just remove the crankcase breather filter from the engine block
(should be one) until you have new oil and a replacement filter, to
make sure that that isn't helping clog things

Just run the breather hose to as close to the air intake as you can so
that blow-by diesel/air gets re-used as much as possible instead of
stinking up the boat

The post about the oil being milky is correct. If water is getting in
your oil, it will be milky. If water is getting in to the oil, you're
better off draining the cooling system and just not ever running the
engine long enough to get very warm.

-scott

On 10/29/17, chris blasucci tartan2767@... [T27Owners]
<T27Owners@...> wrote:
> Either it's water or fuel, I did just go through a problem a vapor lock in
> my heat exchanger and found two leaks in the hoses going in and out of heat
> exchanger which may have dripped down into crank case. After reading in the
> manual that breather hose will leak if oil is over filled I checked oil dip
> stick and fluid started pouring out. That's where I stopped working
> yesterday.. I'm at anchor in Stuart Florida in the Indian river off ICW..
> Thanks for the help.
>
> C
>
> Sent from my iPhone
>
>> On Oct 28, 2017, at 9:06 PM, calebjess@... [T27Owners]
>> <T27Owners@...> wrote:
>>
>> If the crankcase oil has water in it it should look "milky"/white,
>> especially after running the engine for a bit.
>> Water and oil don't mix, of course, but they do inside an engine and the
>> water gets dispersed in the oil as the engine runs, giving it a milky
>> color. If left alone they will separate into layers.
>>
>> Hope you don't have water in your oil.
>>
>> Caleb D
>> T27 #328
>>
>>
>> -----Original Message-----
>> From: chris blasucci tartan2767@... [T27Owners]
>> <T27Owners@...>
>> To: T27Owners <T27Owners@...>
>> Sent: Sat, Oct 28, 2017 3:33 pm
>> Subject: Re: [T27Owners] Yanmar 2GM 20 breather hose!
>>
>>
>>
>> Just pulled the oil dip stick and fuel or water started pouring out, it
>> looked like fuel. ??
>>
>> Sent from my iPhone
>>
>> On Oct 28, 2017, at 2:44 PM, chris blasucci tartan2767@...
>> [T27Owners] <T27Owners@...> wrote:
>>
>>
>> Just installed new hose and engine responded the same, started right up,
>> 10 seconds it's starts revving up and spouting white smoke and oil out of
>> exhaust. Could the be something clogging the intake, because I tried
>> runnning engine with breather valve draining into a diaper and engine ran
>> great
>>
>> Sent from my iPhone
>>
>> On Oct 28, 2017, at 2:05 PM, Scott Walters scott@... [T27Owners]
>> <T27Owners@...> wrote:
>>
>>
>> Oh, one more thought. Do you have a fuel filter with a water separator?
>> If not, definitely install one, and if so, check the water catcher
>> on the bottom to make sure you don't water in your fuel (should be a
>> regular check before starting the engine). Water can be drained off
>> and desposed of as hazardous waste.
>>
>> -s
>>
>> On 0, "chris blasucci tartan2767@... [T27Owners]"
>> <T27Owners@...> wrote:
>> >
>> >
>> > Thx Scott I just got some thicker fuel hose with 3/8 ID and some clamps.
>> > I
>> > just filled the 15 gallon tank a couple of days before this problem and
>> > am
>> > wondering how that might cause the breather hose to fail. Coincidence?
>> > I really appreciate your assistance, at least I feel I'm not alone
>> >
>> > Sent from my iPhone
>> > On Oct 28, 2017, at 12:22 PM, Scott Walters [1]scott@...
>> > [T27Owners] <[2]T27Owners@...> wrote:
>> >
>> >
>> >
>> > There should be some foam or something under where the breather
>> > attaches
>> > to
>> > the engine (see the service manual for the engine) that catches oil so
>> > it doesn't go out the breather, but the crankcase gases will still have
>> > cylinder blow-by (partially burnt diesel). White smoke is generally
>> > associated with partially burnt diesel, not oil (that's described as
>> > "blue"),
>> > so that doesn't sound exactly like oil from the breather getting burnt,
>> > or pressure forcing more oil into the cylinders. And yeah, that should
>> > be unkinked. Don't be shy about putting heavier, thicker hose on there
>> > with the same inner diameter.
>> >
>> > Running for a period of time at dock making smoke should be okay and if
>> > it's a temporary build-up of fuel in the exhaust manifold, it should
>> > clear.
>> > Too much too long and you're causing soot build-up.
>> >
>> > I have some diesel work to do too =|
>> >
>> > -scott
>> >
>> > On 0, "[3][email protected] [T27Owners]"
>> > <[4]T27Owners@...> wrote:
>> > >
>> > >
>> > > My Tartan 27 #332 from 1967 was re powered before I bought it last
>> > January
>> > > with a Yanmar which has been running great until a few days ago when
>> > > I
>> > > noticed some oil in the bilge and discovered the breather hose had
>> > worked
>> > > itself off the nipple of the valve cover. When I went to push it back
>> > on
>> > > the hose fell off in my hand and I struggled to discover where the
>> > other
>> > > nipple went but eventually reattached both ends again one on the
>> > > valve
>> > > cover the other to a nipple headed toward the air intake silencer.
>> > After
>> > > starting the engine in ran for 20 seconds then white smoke began
>> > exiting
>> > > the exhaust and I shut the engine off. The hose did have a bend in it
>> > the
>> > > may have restricted the flow. Any suggestions, I was going to replace
>> > the
>> > > hose and try again today
>> > >
>> > >
>> > >
>> > > References
>> > >
>> > > Visible links
>> > > 1.
>> > [5]
>> > > 2.
>> > [6]mailto:tartan2767@...?subject=Re%3A%20Yanmar%202GM%2020%20breather%20hose%21
>> > > 3.
>> > [7]mailto:T27Owners@...?subject=Re%3A%20Yanmar%202GM%2020%20breather%20hose%21
>> > > 4.
>> > [8]
>> > > 5.
>> > [9]
>> > > 6. [10]
>> > > 7.
>> > [11]
>> > > 8.
>> > [12]
>> > > 9. [13]
>> > > 10.
>> > [14]mailto:T27Owners-unsubscribe@...?subject=Unsubscribe
>> > > 11. [15]
>> >
>> >
>> >
>> > References
>> >
>> > Visible links
>> > 1. mailto:scott@...
>> > 2. mailto:T27Owners@...
>> > 3. mailto:tartan2767@...
>> > 4. mailto:T27Owners@...
>> > 5.
>> >
>> > 6.
>> > mailto:tartan2767@...?subject=Re%3A%20Yanmar%202GM%2020%20breather%20hose%21
>> > 7.
>> > mailto:T27Owners@...?subject=Re%3A%20Yanmar%202GM%2020%20breather%20hose%21
>> > 8.
>> >
>> > 9.
>> >
>> > 10.
>> > 11.
>> >
>> > 12.
>> >
>> > 13.
>> > 14. mailto:T27Owners-unsubscribe@...?subject=Unsubscribe
>> > 15.
>> > 16.
>> >
>> > 17.
>> > mailto:[email protected]?subject=Re%3A%20%5BT27Owners%5D%20Yanmar%202GM%2020%20breather%20hose%21
>> > 18.
>> > mailto:T27Owners@...?subject=Re%3A%20%5BT27Owners%5D%20Yanmar%202GM%2020%20breather%20hose%21
>> > 19.
>> >
>> > 20.
>> >
>> > 21.
>> > 22.
>> >
>> > 23.
>> >
>> > 24.
>> > 25. mailto:T27Owners-unsubscribe@...?subject=Unsubscribe
>> > 26.
>>
>>
>>
>