Carburator - can see a lot of Gas thru air valvas

Mealtime!

I have an 1995 Ski Nautique with PCM engine.

Last year, gas ran thru the carburator into the cylinder so the starter could not start anymore because the engine stuck.

I gave the boat to a local mechanic which claimed that he repaired everything. After that the boat was 2 times in the water and every time a lot of gray/black smoke, the carburator did not react on the engine idle settings at all.

So I decided to get into the carburator myself and found a problem in the part which is screwd in the holley carburator first stage middle with the number 5 (I dont know the english term, however, it was not screwed in good, so the gas ran beside it directly into the motor). The Air/Gas mix was also way to fat.

After that is fixed now, I need the information how to flush the engine from the liquid gas in the exhaust. I think if I dont do that, the gas in the exhaust will make a little "peng"

Can I just pump in a lot of water AFTER the water pump while the engine is turned off or will the water get thru the exhaust into the cylinders?

thanks for any information

I hope you have learned that the mechanic that can repair anything is a liar.

Thank you for your replies!

Since the gray and black smoke ONLY was when the boat was startet (first time everything fine if it stood a Long time) turned of and startet again an hour later (when the carbornator was complete empty of gas because it ran down into the Motor), I don not think that there is a waterproblem. also there is no water missing in the cooling System.

yes, I will Change the oil, and filter - can you tell me how the pump to drain the oil is called? I have to buy one...

greetings from Austria - Keep you posted

8122pdbrainard,
thank you for your idea. Saidly, the boat is an european Version, so there is a oilsump under the Motor wich cannot be removed (unless I remove the Motor) so I can't reach the garboard drain from inside the boat. So a pump to stick ON the oil drain hose would be fine - I saw such a pump 15 years ago by a waterski Club and want one...
greetings daniel

Oilremovalpump:
I found it in ebay and Amazon!
ebay
amazon

daniel1978 wrote: Mealtime again! Still is the question, how to clean the exhaust from unused gas.

Hook the garden hose up to the exhaust manifold inlets and tilt the trailer down aft.

Mealtime again.

Thank you for your answers.

So, I changed Oil and Filter, I disassambled the carbanator again and rechecked on the workbench: everything is leakproof.

So, NO gas Comes out of the carbanator on the workbench, even with a lot of pressure thru the fuel line.

I put it on the engine, and started about 30 seconds. Then I can see a lot of liquid gas thru the ventilation flap.

How is that possible? May it be a Problem with the electric joke?

greetings daniel

Daniel - the power valve (part that was loose) can get ruptured from backfire & cause flooding. FYI.

The last start attempt (without choke, choke valve manually opend) was again a disaster. Relly much gas ran thru the air channel, just on single fire attempt from the engine. Where do I get a carbonator in Austria?!

greetings daniel

Hi!

I have no exact pressurelevel I put to the carb - however, the needle is new and leveled exactly like in the restore kit told from holley.
No I did not Change the pump...

greetings daniel

Does your carb have a accelerator pump transfer tube between the metering block and the main body? You may have used the wrong gasket which can give you a rich issue because you are pulling fuel from the accelerator pump circuit.

at gR@HaM

Of course! My Family and I are looking Forward to a sponsored trip to England - can we stay at your house? ;-)

greetingsd aniel

at backfoot100:

Hello!

Acutally, I have two books (german of course) and disassembled and reasambled the whole Thing about 5 times now.

Meanwhile ALL Fitting parts are changed 2 times, and I can not find the Problem. Please read also my next Posts...

thanks daniel

Text:

FAQ:
Q: Why are there a lot of scratches on parts where gasket should be?
A: Because the original gaskets really stuck on the carb. I needed several hours to scratch them of.

Q: What is with the power valve and gasket?
A: Both new, thightend very strong

Q: Whats with the needles?
A: Both new, even the old ones look exactly the same

I bould a test place to check the pressure with an handpump - the carbs primary did let gas thru at ~7 psi, so I changed the float to put more pressure on the needle (lower Pictures). After that nearly 10 psi would not leak.

I installed the carb and the engine was flooded with gas.

So. After I started thinking again, and called a few People which Claim to know about holley carbs, I removed ALL Spark Plugs and disabled the EMS, so I can run the starter (and with it the fuel pump) without the fireresistor and no danger.

I saw and wounderd: a lot of gas coming out of the Primary. I changed the float again and the Primary was fine. But the secondary flooded - so I changed that too.

I run the starter again and the carb DID NOT LEAK at all.

I reassambled EMS and Sparks and Plugs and tryed to start.

You guess right: engine flooded!

So I checked the fuel pump pressure: about 6 PSI - everything fine I think...

WHAT THE HELL IS GOING WRONG HERE?!

Must I really order a replacement carb?

PS: maybe a colleg from carinthia will borow me another one and I can check everything else....

PPS: Is it ok to test a Car Carb on dry land if the machine is running at all?

greetings daniel

at backfoot100:

Before I start writing: Thank you for your time!

Since my english is not that good - especially with These specialized Terms (you see, even my Internet Explorer changes a lot of lower case to upper case letters because it thinks we are writing german), act as you write to an idiot please!

I did NOT Change the float itself - i don't have them Jet and there is no gas inside even when I disassemble the carb when it is full of gas.

Take a look to this photo:



-) It took a while, until I realised that I have to hold the gasbowl UPSIDE DOWN to adjust - even in german books that was not clear to me.
-) I am thinking UNTIL NOW that the green and blue line should be parallel after adjustment when fuel bowl is upside down
-) I am thinking UNTIL NOW that the gas sould be as high as the golden metal part in normal Operation, and the float is unter liquid gas until the area where it is getting thicker (parallel to the blue line)
-) UNTIL NOW I Think that to adjust the float, I simple BEND the metal between float and needle at one Point - are you saying, that I have to bend TWO Points of this metal, that the float is again parallel BUT the distance of the new parallel is larger than now?
-) should I think NOW, that any other lines have to be parallel after adjustment?

please enlighten me....

PS: thanks for your nice words about my repair attempts - actually it is my first Problem which I could not solve until now. And I do a lot with pinball machines from the last 50 years (my Hobby) and I even changed gears in a MAN Autobus and repaired my Ferguson 35x Traktors diesel pump...