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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Re: 550 choke question

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11-14-2013 22:57:20

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Any history to this? Often much easier to diagnose if we know whether it was OK yesterday and not today or whether the fuel system has been interfered with recently, etc, etc.

A vacuum gauge may help you diagnose the problem. Simple gasket failure can often be found by spraying with oil.

You say it fires, but does it run on all cylinders?


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11-15-2013 07:44:23

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 Re: 550 choke question in reply to oliver90owner, 11-14-2013 22:57:20  

Sorry, not much history. I bought it a year and a half ago, it has been like this the whole time.
It hits on all 4 cylinders, at least it sounds like it.

I have been working hard to get my 88 back up for the last 10 days. Now that it is up, I am going to take the 550 out of service and pull the manifolds for a look see. I am going to replace the exhaust manifold with a header, since I cannot find a new one, and mine is broke big time. I'll post what I find.

Of course, if someone has any other ideas, please post 'em! <grins>

This post was edited by RC78 at 07:46:04 11/15/13.

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11-15-2013 14:29:22

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 Re: 550 choke question in reply to RC78, 11-15-2013 07:44:23  
Quoting Removed, click Modern View to see

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11-15-2013 14:04:14

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 Re: 550 choke question in reply to RC78, 11-15-2013 07:44:23  
Not aware of what carb you have, but I once had a marvel shebler on an 80 which had a boring blocked on the slow speed side, which stopped it running slow. I think it was all OK if you could get it onto the power jet side (revs up), but gave up as soon as back to tick-over. A bit of a job to find as the blockage was well up the boring. I am lucky enough to have a known working replacement, so I soon knew it was that carb that was the problem


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