Author Topic: Enrichment adjustable screw  (Read 255 times)

Pagodatastic

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Enrichment adjustable screw
« on: May 08, 2024, 15:22:31 »
Can someone please point out, ideally with a photo, the adjustable enrichment screw for my 1969 SL280 (excuse my ignorance please)
Thank you so much

Pawel66

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Re: Enrichment adjustable screw
« Reply #1 on: May 08, 2024, 18:57:59 »
There are two of them:
- click adjustment knob - responsible for idle adjustment and revs up to 1500-1700rpm
- full range adjustment - responsible for adjustment across rev spectrum, also idle

Both are on the pictures here: https://www.sl113.org/wiki/Fuel/Injection

As a Full Member you also have access to Linkage Tour, which is describing idle adjustment procedure.

I am also enclosing picture of my FIP with marked screws.

There is also a screw in the throttle, it is tempting, but it is not for mixture adjustment. It is just a stop screw for stopping throttle in certain position as closed (Linkage Tour explains how to do it).
Pawel

280SL 1970 automatic 180G Silver
W128 220SE
W121 190SL
G-class

wwheeler

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Re: Enrichment adjustable screw
« Reply #2 on: May 08, 2024, 21:49:44 »
I would offer a word of caution. The injection pump is a complicated beast and not easy to adjust correctly. I would make 100% sure all other possible issues have been addressed before adjusting the pump. If it is simply to adjust the idle speed, that is one thing. Even that isn't as easy as a typical carbureted engine. Read all you can on this subject before getting the tools out.     
Wallace
Texas
'68 280SE W111 coupe
'60 220SE W128 coupe
'70 Plymouth Roadrunner 440+6

Pagodatastic

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Re: Enrichment adjustable screw
« Reply #3 on: May 09, 2024, 14:17:18 »
Thank you Both.
Best
S