Is this ok?

noob

Cadet
Joined
Aug 7, 2007
Messages
7
I've got a 93 Tohatsu motor that i have just recently bought. I had gotten a steal for the boat. I am just wondering if it was just too much of a steal.

The engine cranks up fine and was running great. Actually it still is. My question is this. From the pics that i have posted is this just a problem of maybe too much oil and it just running off?

The motor was rebuilt 6 months ago and the carbs were redone professionally.
Please advise as I am really anxious to find out what this is.

Oh by the way, I am a new member and lurker! Great forum keep up the great work!!!!

If this is a problem what must i do to fix it??

I am a noob when it comes to boating and I hope this is not too drastic.
 

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Last edited:

TOHATSU GURU

Admiral
Joined
Jul 22, 2004
Messages
6,164
Re: Is this ok?

The oil appears to be from the fill screw itself so that would be Abby Normal.
 

rogerwa

Commander
Joined
Nov 29, 2000
Messages
2,339
Re: Is this ok?

That is not coming from the drain screw. You can see the drin screw in the first pic to the left. this is coming from a drain hole in the bottom of the prop shaft bulge (my own term.)

The amount seems excessive as mine does not drip at all. I would wonder if you've got a problem with the oil injection. If I am not mistaken, the manual has an adjustment procedure.

BTW, you are not mixing oil with this in addition to the oil injection? Correct?

The black nature of it would lead me to believe it is unburnt oil as opposed LU lube. But you never know. I could not tell unless I could touch and smell it..
 

noob

Cadet
Joined
Aug 7, 2007
Messages
7
Re: Is this ok?

That is not coming from the drain screw. You can see the drin screw in the first pic to the left. this is coming from a drain hole in the bottom of the prop shaft bulge (my own term.)

The amount seems excessive as mine does not drip at all. I would wonder if you've got a problem with the oil injection. If I am not mistaken, the manual has an adjustment procedure.

BTW, you are not mixing oil with this in addition to the oil injection? Correct?

The black nature of it would lead me to believe it is unburnt oil as opposed LU lube. But you never know. I could not tell unless I could touch and smell it..

No I am not addding oil to the fuel. It is a auto injection type system. Do you think it is worth having somebody take a look at it. I am going out on the river tomorrow. Is there a online manual somewhere?? i have tried looking but without any success.

Thanks for your replies :)
 

TOHATSU GURU

Admiral
Joined
Jul 22, 2004
Messages
6,164
Re: Is this ok?

You must have better eyes than I do. But, if it isn't coming from the screw it is unburned fuel/oil mix. Do not attempt to adjust the oil pump ratio screw unless you are prepared to spend a great deal of time measuring the oil flow rate while you run the engine on pre mix.
 

TOHATSU GURU

Admiral
Joined
Jul 22, 2004
Messages
6,164
Re: Is this ok?

Stupid me...I bumped up the image and it obviously is the drain hole. Bad news though is that that oil looks funny. Usually unburned oil is black and this is grey. No there is no source for legal online service manuals. There are many sources online for hard copy manuals including iboats.
 

noob

Cadet
Joined
Aug 7, 2007
Messages
7
Re: Is this ok?

Ill see if i can get some white paper or something and put it on there.

Ill post more pics.
 

noob

Cadet
Joined
Aug 7, 2007
Messages
7
Re: Is this ok?

I have added pics here and they are at a decent resolution. It looks like sludge. It smells like oil with a hint of gas. Feels like just real fine "mud, sludge, etc. No metal fragments or anything like that.

http://userfriendly.us/index/

Pics Link

Wouldnt the oil mixed in with water produce a grey like substance. This is a drain that would somehow easily get mixed in with water isnt it?
 

TOHATSU GURU

Admiral
Joined
Jul 22, 2004
Messages
6,164
Re: Is this ok?

In some of the images it looks grey and some black.........Black would be unburned fuel/oil mix. The grey kind of throws a curve because, usually, grey is gear oil/water emulsion. Also, the fuel//oil mix is almost always thin and there shoud not be that much of it. Check your gear oil by loosening the screw. If the gear oil is okay, then your back to fuel/oil. If you have bad gear oil then you almost certainly have a leak or maybe the previous owner never changed it.
 

rogerwa

Commander
Joined
Nov 29, 2000
Messages
2,339
Re: Is this ok?

As TG suggested I would definitely check the lu lube. If you are getting some getting some here, there would be water in the lube itself.

Has it only happened this once or does it do this all the time?

What condition are the plugs in? If they are gunked up, it may not be burning the mixture effectively and creating a lot of slime.

Also, I would not want to touch the injuection system either. But there is a mark on it that should line up when it is at idle. It would not harm to check the alignment of that mark. You would need the manual of course.

I would say that if you check the lube and it is OK, I would think you could take it out. If it the lube is milky, then don't go and investigate further. It may not hurt to run it some and get it flushed out..
 

zzzzz

Lieutenant Junior Grade
Joined
Jan 13, 2003
Messages
1,094
Re: Is this ok?

hate to pop your bubble there Noob but that appears to be a hole in your gearcase that is not supposed to be there...it would be threaded if it were a drain or vent hole...the drain screw is visible and the vent is always higher than the propshaft "bullet" so I'd have to say you need a gearcase housing :cool:
 

noob

Cadet
Joined
Aug 7, 2007
Messages
7
Re: Is this ok?

hate to pop your bubble there Noob but that appears to be a hole in your gearcase that is not supposed to be there...it would be threaded if it were a drain or vent hole...the drain screw is visible and the vent is always higher than the propshaft "bullet" so I'd have to say you need a gearcase housing :cool:

Yes it is a hole and it is a manufactured hole. There is a identical one on the other side.

Ill take it to the shop tomorrow and let you guys know what i find out.
Ill surely want to find out myself.
 
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