>
> OK folks, I am hoping that some wise sage on the list has had this
> problem before. A quick fix would be nice, but just a fix at all would
> be great!
>
> 948 MOWOG special
> twin SU HS's The young man who brought it by complained that it was
> running rough. He was right. Barely running at all. Carb linkage all
> screwed up, etc. (Dad had tried to fix it)
>
> Straighten out the linkage, replace the adaptor bushings on each one,
> put the carbs back on and fire it up.
>
> It run real rough. Actually both son and dad says that it sounds better
> but it is not anything I would take out on the road.
>
> Uncouple the linkage, and put on the trusty Unisyn. Rear carb appears
> fine. When placing the Unisyn on the front carb, RPM picks up about
> 1500! OK, so maybe it REAL lean? Adjust the 'jet nut'. The rear carb
> is at 7 flats, the front is now at 15!. Unisyn has about the same
> effect. Engine is still running, sort of. Check linkage, jet seating,
> etc., while it is running, and no success. Now the interesting
> part.....Both pistons are about 1/8" off the body at idle. OK. On
> acceleration, the rear slides open nicely, the front one CLOSES! Piston
> problem? Shut it down, exchange pistons and housings front to rear,
> fire it up, problem stays to the front.
>
> Check the spark plugs, #1 looks OK, but they get darker as you move
> back. So it appears that its running off the rear carb. That is
> further validated by the Unisysn problem. Rear is running rich to carry
> all 4 cylinders, #1 is real lean. Maybe a blockage in the jet? the
> little tube from the bowl? etc. But it could be running real lean if
> there was a vacuum problem. As evidenced by the piston dropping on
> acceleration. But why would the piston drop. They are on the same
> manifold.
>
> So have I given you enough info to come up with a miracle answer. I
> hope so! All suggestions welcome. I fooled with this till about
> 11:00pm last night, with dubious sanity at the end. (It was probably
> dubious to begin with!) Before I give it another shot, I thought I go
> for some advice from the group!
>
> And it still amazes me that the guys thought it was running better than
> before. Before must have really been bad!
>
> Your assistance is appreciated.
>
> I won't be insulted is you suggest something dumb, simple, or stupid. I
> do those three real well!
>
> (I must be missing something real obvious!)
>
> George Merryweather
> merryweather@connectware.com
>
>
I think I'm up to date with the digests but haven't seen a response to this
yet.
Very small hole (instead of a big one, that is) in the front carb to manifold
gasket?
PaulH
73 Roadster (HD&H)
75 V8 (DD)
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