White smoke

Surge

Seaman Apprentice
Joined
Nov 8, 2006
Messages
41
Hi Guys I just got back form the lake after trying my 95 Four Winns Fling. It has an Omc Turbo Jet 115. The engine runs great. Reaches 35 MPH which is what the manual says it should go. The only thing is that it has what looks like white smoke at idle. I have been reading that it could be a bad head gasket. Would it still has the power it now has even with a blown head gasket? Or Is it normal for a 2 stroke. By the way i am using Evinrude/Johnson XD50™ oil. Is this normal i really need some help thanks.
 

kenmyfam

Supreme Mariner
Joined
Aug 10, 2006
Messages
14,392
Re: White smoke

How do you mix that ?? in the tank or an oil injection system ??
 

Surge

Seaman Apprentice
Joined
Nov 8, 2006
Messages
41
Re: White smoke

thanks for the reply guys

I will check compression as for mixing it is oil injected.

Could it be that its betting too much oil?

Anyway thanks
 
D

DJ

Guest
Re: White smoke

Could be.

Look at the spark plugs. Is one or more real clean?
 

kenmyfam

Supreme Mariner
Joined
Aug 10, 2006
Messages
14,392
Re: White smoke

As DWJ says check for a super clean plug. Tell tale of a bad head gasket.
 

Cricket Too

Lieutenant Commander
Joined
May 14, 2003
Messages
1,732
Re: White smoke

Are you sure it's white smoke and not blue smoke, They can look pretty similar if your not familiar with it. 2 strokes smoke, especially at idle.
 

Scaaty

Vice Admiral
Joined
May 31, 2004
Messages
5,180
Re: White smoke

Probably just steam from the hot exhaust/water after coming off plane. My outboards do it ........
 

Surge

Seaman Apprentice
Joined
Nov 8, 2006
Messages
41
Re: White smoke

thanks for the replies guys ill check the plugs. I also have another question. The boat seems to smell like gas all the time.(like when i open the cover it smells even though it hasn't been run.)
could this contribute to the smoke. Also does any one know where the exhaust outlet on this boat is i cant find it. To better describe the smoke it looks like the exhaust out of a cold started car on a cold morning.


Thanks.
 

iwombat

Captain
Joined
Jul 12, 2006
Messages
3,767
Re: White smoke

If it's steam, it will dissapate after a bit. If it's two-stroke oil it'll linger around until it gets blown away.
 

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: White smoke

You should not smell gasoline iin the engine compartment. You will need to find the source before you have an explosion.

Look for leaks along the fuel lines all of the way to the carburetors, and take the cover off the carburetors so that you can determine if fuel is leaking into them because of sticking floats .

This engine is a 115 crossflow, but should have all of the original inboard safety equipment in place. If you have any doubts, please take the boat to a Four Winns dealer.

If you go to the parts manuals on the BRP site and select Turbo Jet in the products pick list, you can get the parts diagrams and parts lists for your engine and drive. Copy this link to your browser without the quotation marks.

"http://epc.brp.com/default.aspx?brands=ej&lang=E"

You can download the parts lists to Excel if you want a copy.

Four Winns has downloads for the boat, which include the steering system and wiriing. Go here and expand the "Past Specifications" for the PDF Files: "http://www.fourwinns.net/fastfacts/index.html"

You may want to contact an Evinrude dealer for the TurboJet Service Manual that you will want if you plan to maintain the boat yourself.

It is typical of two stroke motors to smoke some at start-up because oil has been left in the combustion chambers. Over time, several things cause the OMC Turbojet Engine to smoke more.

One is that the engine has to be pulled in order to service the thermostats, so it does not get done and the engine runs cold.

Secondly, the four recirculation check valves don't get serviced because you have to pull the carbs to get to them, so gunk builds up behind the pistons and causes the motor to run with too rich a mixture.

Third is that it is more complicated to decarb, so that doesn't get done either.

I like the Fling and I completely dissassembled and rebuilt one for my nephew a few years back. It is a lot of fun to run, and 35mph in an open 14' boat feels fast. It pulled one skier OK, too.
 

Surge

Seaman Apprentice
Joined
Nov 8, 2006
Messages
41
Re: White smoke

thanks for the replies ill check for leaks and get back to you thanks
 

Surge

Seaman Apprentice
Joined
Nov 8, 2006
Messages
41
Re: White smoke

i just got back from removing the plugs and all four are equally dirty. They are all brownish with a little oil on them so i think the head gasket is not the problem especially since it has plenty of power. Is this a reasonable inference? I forgot to mention that i just bought the boat so i dont know if this is normal. About the fuel it looks like it is leaking from the top of the carb so i will open up the cover and take a look soon. Any ideas on how to clean it and find the leak thanks.

I will reply as soon as i get the carb cover off.
 

fishfetchr

Cadet
Joined
Sep 15, 2006
Messages
24
Re: White smoke

Take a good look at the inside of the engine cover- If you have a leak in a hose somewhere it may show up somewhere where it may be "spraying". I noticed some gas/oil on the left side of the cowl after noticing the smell and with the motor running and a careful eye- behold a pin hole spraying out of a small hose!
Mario
 

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: White smoke

The fuel at the top of the carbs may be from the primer. After you remove the cover, have someone push the key in while you watch the carbs.

The small primer hose leading to the top of each carburetor does not usually have a clamp, They may leak, or even slip off.

BTW, Most of the readers in this particular forum will not be aware that your motor is an inboard, so keep that in mind when you read the responses.
 

Surge

Seaman Apprentice
Joined
Nov 8, 2006
Messages
41
Re: White smoke

thank you all for your advice now i know what to look for when i take the cover off. Thanks ezeke i will keep that in mind or mention it at the beginning.
 

alexm3

Recruit
Joined
Oct 4, 2007
Messages
2
Re: White smoke

That smoke comes from your fuel pump (VRO) . When membranes are worn enough, than the pressured air gets into your carbs along with the gas and make it smoke bad. I had the same problem. It is hard to find repair kit for this pump and the new one retails for over 300$. My advice - get universal electric pump with 4-7 psi ( do not go any lower) at any autostore(around 40$), hook it up to your ignition and I hope u will not have any problems again.
Good luck.
 
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