Kohler XT650 [22/56] Fuel system

Fuel System

KohlerEngines.com 14 690 01 Rev. G

3. Remove vacuum hose from carburetor vacuum

tting. Attach a vacuum gauge or manometer to

carburetor vacuum tting. Run engine while holding

choke plate open. Gauge should indicate a vacuum

with a minimum of 15" of water. If reading is correct,

check again for binding of restricted linkage.

4. If vacuum indicated is less than 15" of water,

problem is not an auto choke issue.

Diaphragm Assembly and Hose

A Choke Plate B Vacuum Hose

C Vacuum Fitting D Diaphragm Assembly

5. Note position of choke plate. Attach a vacuum pump

to vacuum hose. Choke plate should open 1/2 to 3/4

under vacuum and with a minimum of 15" of water. If

diaphragm assembly is unable to open choke plate,

check hose for cracks, leaks, or restrictions. If

necessary replace vacuum hose. If hose is in

working condition and choke plate fails to open with

specied vacuum, or diaphragm fails to hold choke

plate open for a minimum of 3 seconds, replace

diaphragm assembly.

6. Attach vacuum hose to carburetor vacuum tting.

7. Start engine. Upon start up choke plate should be

1/2 to 3/4 open. Choke plate should gradually

change to full open position after 2 to 2-1/2 minutes

of running. This action is performed by bimetallic

spring assembly being heated. If choke plate fails to

open, recheck linkage for binding. If necessary

replace bimetallic spring assembly.

NOTE: Inspect to ensure choke linkage is not binding.

Choke Plate and Bimetallic Spring Housing

A Choke Plate B

Bimetallic Spring

Assembly