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  #1  
Old 04-20-2021, 03:03 PM
captclayt captclayt is offline
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Join Date: Dec 2020
Location: Michigan
Posts: 5
Default Re: Any idea what this is?

Hello,
Today I was mowing my lawn after servicing my B&S 18.5 twin cylinder Engine. model 4h777
About an hour into the cut I noticed a lot of smoke coming out of the exhaust. The engine was also losing power with the cutting deck engaged. When I disengaged the deck the engine would pick up in rpms. I stopped the engine and checked the oil only to find it to be way way over the fill mark and smelt like gasoline. I checked the gas level at the rear of the engine and the tank was empty. Three gallons gone in a mater of one hour. How does three gallons of gas empty into the crankcase in the matter of an hour? Their would have to be a direct path to the crankcase from the tank.
The engine starts on first revolution of starter.

So far:
Plugs are new.
Pulse fuel pump is working.
Drained and removed filter. Put fresh oil and filter back onto engine.
I have removed the carb and cleaned it. The fuel bowl had s lot of junk in the bottom. Disassembled and I used carb cleaner on all the jets and ran fine wire thru all the jets.
I reassembled the carb and turned it up side down and blew thru the gas inlet and had no air coming thru needle valve I then turned carb back and was able to blow thru needle valve.
I did make the mistake of removing the dip stick while engine was running and got covered in gas/oil mixture. Luckily I was wearing my glasses.
Checked compression 125 and 150psi
Any ideas where the gas is entering the crankcase?
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Old 04-20-2021, 04:25 PM
R Bedell R Bedell is offline
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Location: Michigan
Posts: 13,693
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What Cub Cadet model of Tractor are you referencing ?

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CC Models: 100, 105, 1450, 782, (2) 784, & 2072

Buy: Made in the USA
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Old 04-21-2021, 09:10 AM
captclayt captclayt is offline
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Join Date: Dec 2020
Location: Michigan
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Thanks for replying.
LT1018
The information under the seat says:
MODEL 19016
13AL11CG712
ENGINE B&S 18.5 OHV VALVE COVER INFO
MODEL 4 H777
TYPE 0171E1
CODE 030503YC

BILL
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Old 04-21-2021, 09:42 AM
R Bedell R Bedell is offline
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I would focus on a "fuel pump" (BS-697090).

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CC Models: 100, 105, 1450, 782, (2) 784, & 2072

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Old 04-21-2021, 10:42 AM
captclayt captclayt is offline
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Location: Michigan
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Thanks.
According to the Cub Cadet part list the pump #is BS-597338.

It looks to be a none repairable pump.
Is there any way to check if it is allowing fuel to dump into the valve cover while its running?
or should I shoot the parts cannon at it.
Bill

All right then.
Found this info on another web site:
While engine is running remove pulse tube from top of valve cover and check if fuel is dripping from bottom of tube.
Replace pump if it is.
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Old 04-21-2021, 11:47 AM
R Bedell R Bedell is offline
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Quote:
13AL11CG712
Per the Cub Cadet Web Site:

Parts can be had at any Cub Cadet or Briggs-Stratton Dealers
Attached Images
File Type: jpg BS477.jpg (8.9 KB, 54 views)
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CC Models: 100, 105, 1450, 782, (2) 784, & 2072

Buy: Made in the USA
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