Making oil

[Seaduck]

Yeah mine is a 07. Here is a picture where my evap hose connects back to the crankcase.

[wilbur1]

I appreciate it seaducks, Where does that hose attach to the VST? I have a hose about 1/4in. that comes off the back of the VST on the top that runs forward and looks like it connects to the cowling in the front. But it defiantly dont connect to the engine.

[Seaduck]

I believe it comes off the top. Not sure. I haven't looked in awhile.

[wilbur1]

I talked to a rep from Suzuki who just happened to stop by my dealer and he said on mine the only way it will get gas in the crankcase is the pump on the back on the rocker cover. HE ALSO said that the VST that I hace is not vented in the crankcase.

[Moonlighter]

And what was the advice on how to fix the issue?

[nelbur]

There are three ways that gas can get into the oil on this engine. A leaking diaphragm on the low pressure fuel pump, which can be checked by unbolting it from the block and observing it under fuel pressure from the primer bulb; a leaking needle and seat on your vapor separator. I suspect you still have a vent hose going to the crankcase like the older engines do. Find the hose and run with it disconnected from the crankcase and look for fuel. However, both seem kinda unlikely on so new an engine. It is common for new four stroke outboards of any brand to make oil until the rings seat. This can go on for quite awhile if the engine is babied or trolled a lot instead of run hard. apparently the oil never gets hot enough to evaporate the blow by out of the engine. Suzuki has a hotter thermostat for your engine which I have installed in my 140. Mine made some oil even after 100 hours, likely due to the trolling I tend to do.

edit; It is possible that your new engine has the VST vented into the intake somewhere instead of the crankcase. You should be able to follow the vent tube and see where it goes.

[wilbur1]

The vent tube runs to the front of the lower right side cowling through a grommet and then runs down somewhere. I have to take the lower cowling off to see where it ends up. The rep told me the same thing on how to check the fuel pump. Im going to be out of town til Sun. I will check it then. After the first 4hrs. of break in I have been idling quite a bit cause of fishing no wake lakes. Thank You Guys for all the Help. Very Appreciated.

[redlowrey]

There are three ways that gas can get into the oil on this engine. A leaking diaphragm on the low pressure fuel pump, which can be checked by unbolting it from the block and observing it under fuel pressure from the primer bulb; a leaking needle and seat on your vapor separator. I suspect you still have a vent hose going to the crankcase like the older engines do. Find the hose and run with it disconnected from the crankcase and look for fuel. However, both seem kinda unlikely on so new an engine. It is common for new four stroke outboards of any brand to make oil until the rings seat. This can go on for quite awhile if the engine is babied or trolled a lot instead of run hard. apparently the oil never gets hot enough to evaporate the blow by out of the engine. Suzuki has a hotter thermostat for your engine which I have installed in my 140. Mine made some oil even after 100 hours, likely due to the trolling I tend to do.

edit; It is possible that your new engine has the VST vented into the intake somewhere instead of the crankcase. You should be able to follow the vent tube and see where it goes.

....You got two out of three right

[wilbur1]

I just got back from fishing. I changed the oil before I left. I ran the boat hard for about an hour total for the 2 days. I checked the oil and it dropped 1/8".
I believe the making of the oil was from idling around on a NO-Wake lake for 3 days in a row. Thanks for all your Help

[catacom225]

Great, These engine like to pushed hard every now and then so don't be afraid to