| Author |
Message |
    
David Smith
New member
Username: pescadito
Post Number: 1
Registered: 05-2008
| | Posted on Thursday, May 01, 2008 - 10:53 pm: | 
|
At first I thought it was the thermostat as this happened a few years back...replaced this, as it was indeed stuck open, but developed the same symptoms-fuel in the crankcase oil.
It ran fine for a day, then only at slow speed, as i limped home. Now I could sure use some advice on the proper diagnosis.
What could be the other causes for fuel in the crankcase oil?
Any advice would be much appreciated ! |
Brian Roe
Visitor
| | Posted on Friday, May 02, 2008 - 07:23 am: |
|
I am having the same problem with my bf8 I discovered the pcv was picking up the oil and gas mix from the crankcase and shooting it back into the intake causing the plugs to get wet with the mix. I took it apart and the pcv reed valve was rusted and possably not working properly. Just ordred the parts to replace ill let you know what happens. I know this does not explain the gas in the oil to start with. I was wondering if the fuel pump could be leaking into the valve cover. Does yours run fine then start smoking right before the plugs get wet? B |
David Smith
New member
Username: pescadito
Post Number: 2
Registered: 05-2008
| | Posted on Friday, May 02, 2008 - 11:20 am: |
|
I changed the plugs and they looked fine, though there is some white smoke at idle. This was ocurring before I had fuel in the oil.
Now it filled up the dipstick in one day. Wondered where I should start. Could clogged jets cause the problem? Stuck float? Just not sure where to begin... |
ikia
Visitor
| | Posted on Friday, May 02, 2008 - 11:40 am: |
|
Check the fuel pump and check the carburetor floats.Run fuel out of the engine when you take boat out of water. |
David Smith
New member
Username: pescadito
Post Number: 3
Registered: 05-2008
| | Posted on Friday, May 02, 2008 - 12:14 pm: |
|
Thanks ! How does one check the fuel pump ? |
ikia
Visitor
| | Posted on Friday, May 02, 2008 - 01:12 pm: |
|
Find the pump and if it has a rupured diaphragm it may leak fuel into the oil.Remove pump from the mount and operate primer ball to see what happens. |
David Smith
Member
Username: pescadito
Post Number: 4
Registered: 05-2008
| | Posted on Saturday, May 03, 2008 - 06:26 pm: |
|
Took a look at fuel pump and not the problem. No fuel came out when I primed it with the bulb. Just wondering what carburetor problems could cause fuel in the oil ? |
JUST-IN-TIME
Senior Member
Username: justintime
Post Number: 3999
Registered: 09-2006
| | Posted on Sunday, May 04, 2008 - 12:54 am: |
|
it is either fuel pump or t-stat
nothing else |
David Smith
Member
Username: pescadito
Post Number: 5
Registered: 05-2008
| | Posted on Sunday, May 04, 2008 - 01:04 am: |
|
so if it is the fuel pump....when i take the pump off and prime the bulb, fuel should come out, if it is faulty, yes? |
JUST-IN-TIME
Senior Member
Username: justintime
Post Number: 4000
Registered: 09-2006
| | Posted on Sunday, May 04, 2008 - 03:16 am: |
|
sometimes u can not see it
might need to get hot to expand |
David Smith
Member
Username: pescadito
Post Number: 6
Registered: 05-2008
| | Posted on Sunday, May 04, 2008 - 10:24 am: |
|
Do you think I need try to replace the whole pump or start with just the diaphragm ? Can something go wrong with them other than the diaphragm? I'm a commercial fisherman and am trying not to have too much downtime ! Thank you kindly for your advice ! |
JUST-IN-TIME
Senior Member
Username: justintime
Post Number: 4002
Registered: 09-2006
| | Posted on Sunday, May 04, 2008 - 11:19 am: |
|
whole pump is ez thany the gasket |
David Smith
Member
Username: pescadito
Post Number: 7
Registered: 05-2008
| | Posted on Sunday, May 04, 2008 - 01:40 pm: |
|
not sure I understood..."easier to replace the whole thing? |
JUST-IN-TIME
Senior Member
Username: justintime
Post Number: 4015
Registered: 09-2006
| | Posted on Sunday, May 04, 2008 - 02:25 pm: |
|
yes the whole pump |
