[AT] Somewhat OT: White GT problem

[Doug Tallman]

Steve, a couple thoughts:
1st, Does the fuel tank have a shut-off? These engines were common to 
have the needle and seat leak and the tank would gravity feed into the 
engine while setting. Your description of the way it was running sounds 
like a leaky needle and seat. Usually the oil would show overfull. Did 
you check it before firing it up?? If not........shame-shame! :-) They 
usually don't have a shut-off from the factory. i'd install one even if 
it wasn't your problem this time. The next trick is remembering to use it!

The second thought would be that by having it tipped up it filled the 
valve chamber where the breather tube hooks and it couldn't drain down 
fast enough. Not sure if that's even possible on that engine. Another 
thing I've seen happen on the overhead valve engines is that the head 
gasket blows out between the cylinder and the area that the pushrods 
come up out of the crankcase. (poor design) When that happens, it blows 
oil out the breather too. I think at this point I would change the ooil 
and fire it up again to see what happens.

                                                                                                       
Doug T







The Allen Family wrote:
> My question is about a GT, but it's really a small engine problem, and 
> I know that there is scads of experience with them here, 'way more than 
> I have!
>
> I recently got hold of a '95 White L-12 GT; it's a fairly lgiht duty 
> yard mower with an 11.5 HP, one-cylinder B&S.  It has a side-draft carb 
> on it remarkably similar (outside, anyway) to the MS carbs on old JDs. 
>
> The thing sat for a number of years unused before I got it.  When I 
> first tried firing it up, it wasn't getting fuel, so I pulled the fuel 
> bowl off the carb and freed up the float by hand.  Then, it got 
> fuel--too much, in fact, for it ran very rich.  I used it for 4 or 5 
> hours hoping the fuel flowing through the carb would clean it out some. 
>   Then it was down for a week or so needing a new belt. 
>
> Last night (after putting the new belt on), I cranked it up again 
> (having added wome Sea Foam to the gas), and it ran for a few minutes, 
> and then something really funny happened.  There is what appears to be 
> a PCV tube in the bottom of the air-cleaner, and  either oily gas or 
> gas-diluted oil came spouting out of that PCV tube.  I shut it down 
> quick, but it really coated the top of the motor, the sheet metal, and 
> me before I could. 
>
> I am pretty sure I need to pull the carb--ya think?--but I'd like some 
> infomred opinions on what I can expect to find and whether something 
> else might be contributing.  I pulled the oil dipstick, and I don't 
> think I smelled gas in the oil, but given the gass all over the place, 
> I might not have caught it.  One other point:  to change the belt, I 
> had to tip the thing up on its back end.  Could I have caused the 
> problem thus?
>
> Any thoughts would be appreciated, gents!
>
> Thanks!
>
> The "original" Steve Allen
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