Craftsman 143.991200 Specifications download pdf (Page 14)

Series 10

This carburetor is for use on all season engine

applications. It is the equivalent of the series "8" with

the addition of a choke. It has a fixed main and idle

with a serviceable main nozzle and a primer assist,

with the added benefit of a choke for cold weather

starting.

Walbro Model LMK

OHV 15-17 models use this float-feed carburetor. The

carburetor is attached to the intake pipe using studs

that also fasten the air filter body. Walbro model and

manufacturing numbers are found on the throttle end

of the carburetor. This carburetor has a fixed,

nonadjustable main mixture jet.

Idle mixture screws were adjustable on early

production OHV15. This has since changed to a fixed

idle jet which may be capped for tamper resistance.

If no spring is visible, the jet is fixed. Servicing should

be done by a Authorized Tecumseh Dealer.

Series 9

Series 9 carburetors are hybrid versions of the

Series 8. This carburetor uses a fixed idle jet and fixed

main fuel circuit. This carburetor is totally

nonadjustable. The bowl nut uses a ball plug on the

bottom to cover the center drilling. Also visible is a

plastic main fuel discharge nozzle in the venturi. The

Idle mixing well and jet will be visible but not machined

(diag. 15)

Series 8

Series 8 carburetors have both a fixed main and a

fixed idle circuit. These carburetors are totally

nonadjustable. This series of carburetor uses an

integral primer system like the Series 6. Distinguish

this carburetor from the Series 6 by the fixed idle jet

that appears as a screw just above the bowl on the

primer side. This fixed idle jet may also be capped.

(diag. 14)

IDLE JET

CAST BUT NOT

MACHINED

MIXING WELL

CAST BUT NOT

MACHINED

CAPPED FIXED

IDLE JET

LOW IDLE

MIXTURE SCREW

MAY BE ADJUSTABLE OR FIXED

CHOKE PLATE

FLAT SIDE DOWN

CAP

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Craftsman 143.991200 Specifications Page 14

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