Cub Cadet T65 Series - Manual (Page 51)

F UEL S YSTEM AND G OVERNOR
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3. Squeeze the two sets of tabs together and push the
primer out of the housing. See Figure 4.18.
4. Install the primer by following the above steps in
reverse order.
5. Test run the engine before returning to service.
Carburetors
Troubleshooting the carburetor is a process of elimination. If everything else on the engine checks out, the carbu-
retor is probably bad.
NOTE: It is important to perform a compression or leak down test before condemning a carburetor. An engine
can have a borderline compression reading and not create enough of a vacuum to draw in a sufficient
fuel/air charge.
NOTE: If the engine has border-line compression, a quick test to see if that is the problem is to remove the
spark plug. Squirt a little bit of oil into the combustion chamber to seal the rings. Reinstall the spark
plug. If the engine starts and runs ok, then that was the problem. If it does not start, move on to the car-
buretor.
Inspecting the carburetor:
1. Remove the float bowl and check for dirt and/or varnish.
2. Inspect the needle valve and needle valve seat for dirt and/or damage.
3. Inspect the gaskets and O-rings for damage.
4. Inspect the vents and orifices, verify that they are free of debris.
NOTE: If a little cleaning and new gaskets will fix the carburetor, do it. If the carburetor requires extensive
cleaning it is better to replace the carburetor.
IMPORTANT: Never try to mechanically clean orifices. That will damage them and ruin the carburetor.
NOTE: The carburetors used on all vertical shaft engines are similar in design, but differ in calibration.
NOTE: The jet markings (if present) may be used for identification purposes, but the technician should not
attempt to infer orifice sizes from the identification numbers.
NOTE: Installing the wrong main jet, or a carburetor with the wrong main jet will produce performance and
emissions issues.
Figure 4.18
Squeeze the barbs together,
then push