SUs don't plug up like that but varnish can still form, but SUs are easy to
clean.
Mike
----- Original Message -----
From: "linob" <lino.baggio@idxcorporation.ca>
To: <datsun-roadsters@autox.team.net>
Sent: Monday, June 17, 2002 9:36 AM
Subject: RE: Solex that doesn't suck
> First off, thanks to all who contributed there $0.02 towards my Solex
> situation. I'd like to report that after dismantling and cleaning each
> carb (again) as well as careful set-up and balancing, my roadster now
> works as intended. I had checked for throttle shaft / butterfly problems
> (thanks for the info, Peter) and all seemed well in that aspect. I did
> find some deposits of varnished fuel, which probably created some type
> of blockage somewhere. In speaking with the previous owner, he hadn't
> put fuel stabilizer in the tank before it's winter hibernation,
> something I've done with all my vehicles and have never had any of these
> problems. From what I've heard / read, fuel can go bad in 4-6 weeks -
> anyone who stores or doesn't drive their roadster for any length of time
> should seriously consider putting an additive in there tank.
>
> Thanks to all again.
>
> -----Original Message-----
> From: Vicki Burrows [mailto:gregnvicki@earthlink.net]
> Sent: Friday, June 14, 2002 10:30 PM
> To: lino.baggio@idxcorporation.ca; datsun-roadsters@autox.team.net
> Subject: Re: Solex that doesn't suck
>
>
> Tricks? Nope I can't help you there. I looked over the exploded
> picture of the carb looking for possible places to leak. My guess
> remains with a missing or worn throttle shaft seal, or a bent shaft as
> Carl suggested. Another possiblity listed in the Mikuni manual is an air
> leak at the starter disc. Remove it and clean it, making sure that you
> don't damage the surfaces of the disc or carb where they meet.
> Regarding your accelerator jets and the one that was plugged, make sure
> you cleaned that out well with carb cleaner and compressed air (sounds
> like you did). They tend to plug as the holes are very small. Also,
> don't lose the little washer that goes on the bottom of the accelerator
> jet. There is also supposed to be a small round rubber o-ring that goes
> on the cap screw that covers the jet... not sure if it were missing if
> it would leak air or not. Keep us posted Greg
>
>
> linob wrote:
>
> > I've also tried carb cleaner - hoping for the quick fix in a can
> > approach. When I had the carb off and apart (partially apart), I did
> > find a tear in the gasket for the plate covering the jets - which I
> > replaced and thought that was the source of my air leak. Didn't do the
>
> > trick. I should also note that when the carbs where off the car,
> > moving the throttle caused the fuel to stream out a few feet on all
> > barrels except the one that is causing me trouble - it just sort of
> > leaked out. After I cleaned things out with compressed air, I was
> > able to get all 4 barrels to stream fuel evenly. I'm going to do more
> > wrenching this week-end - any tricks with removing / inspecting the
> > throttle shaft?
> >
> > -----Original Message-----
> > From: owner-datsun-roadsters@autox.team.net
> > [mailto:owner-datsun-roadsters@autox.team.net] On Behalf Of Vicki
> > Burrows
> > Sent: Friday, June 14, 2002 12:03 AM
> > To: linob
> > Cc: datsun-roadsters@autox.team.net
> > Subject: Re: Solex that doesn't suck
> >
> > The only thing I can think of is that you have a vacuum leak
> > somewhere. Have you tried the old " spray carb cleaner around the
> > gaskets" trick? Did you inspect the carb when you took it off...
> > looking for any place where it could be cracked, missing a seal (like
> > around the shaft), bolt, etc... I am grasping here, but I can imagine
> > no other explanation. What does the plug look like? Greg Burrows
> >
> > linob wrote:
> >
> > > Hi All,
> > > I'm hoping that someone can shed some light on this rather
> > > frustrating
> >
> > > situation, I'll try to be brief: I have a U20 with old style
> > > solex's, I was originally having trouble with a compression loss in
> > > cylinder #4, trouble shooting lead to trouble in the head, pulled
> > > the head, had
> >
> > > everything freshened up by a competent machinist with experience
> > > with these motors, head is now OK, but still having difficulties
> > > with #4 cylinder. I switched carbs front to back, and now have
> > > trouble with #2 cylinder, which isolates trouble with that carb. It
> > > doesn't seem to
> >
> > > flow as much air as the other carb - my airflow meter confirms this.
>
> > > I've checked, cleaned all the jets, gaskets, venturies,ect and still
>
> > > can't seem to get an improvement in airflow. I can easily get
> > > everything to idle properly and have followed the manual for proper
> > > balancing, which I can get it to do by over adjusting the one carb,
> > > but pulling the spark plug wire at #2 cylinder doesn't make a
> > > difference in engine performance. Any ideas?
> > >
> > > Thanks in advance...
> > >
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