Cub Cadet CC 4BP 32cc - Manual (Page 14)

Trouble shooting
11
5. Testing compression:
NOTE: If the engine will run, start the engine and
let it warm up first for a better reading.
Compression testing
The compression of an engine can be tested in one of
two ways; a compression test or a leak down test.
To perform a compression test:
NOTE: If the engine will run, start the engine and
let it warm up first for a better reading.
1. Remove the engine cover and spark plug by fol-
lowing the steps described in Chapter 2: Mainte-
nance.
2. Screw the compression tester into the spark plug
hole. See Figure 3.7.
Figure 3.4
Compression
tester
3. Rapidly rotate the engine until the needle on the
compression gauge stops moving.
NOTE: The starter is part of the engine cover
and therefore can not be used to rotate the
engine. A cordless drill can be used to rotate the
engine. See Figure 3.5.
IMPORTANT: Never use an impact wrench to
rotate the engine. It wil result in a boken crank-
shaft.
Figure 3.5