TOHATSU 40 Service Manual page 127

2. Thoroughly clean all parts including fasteners with solvent and
dry with low pressure compressed air. Verify all carbon deposits,
gasket adhesives, and threadlocker residue have been removed.
3. Inspect water pipe (7) for kinks or obstruction, reverse
12
gas passage (8) for signs of deterioration. Replace as
needed.
4. Inspect exhaust housing (9), exhaust pipe (10), engine
12
base (11), and driveshaft housing (12) for cracks, chips,
dents or other damage.
5. Check driveshaft housing for distortion. Place housing on
13
a surface plate and use a dial gauge to measure the run-out
on the top edge of the housing. The run-out measurement should
not exceed 0.009 in [0.228 mm]. If dial gauge and surface plate are
not accessible, seek the services of a qualified machine shop.
DO NOT attempt to straighten a distorted driveshaft
housing. It must be replaced. A distorted driveshaft
housing can cause excessive wear of upper
driveshaft splines and will damage the crankshaft
splines.
6. Examine the upper and lower rubber mount components
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for damage or signs of deterioration. Replace as needed.
7. Inspect the upper rubber mount damper if equipped, for
15
cracks or chips.
Assembly
1. Verify all new rubber replacement parts have been installed on
components as needed.
2. Position engine base with powerhead side facing down.
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Seal the bottom portion of upper mount cap bolt holes (1)
with silicone sealant and allow to dry.
3-/ 4-Cylinder
CAUTION
MIDSECTION
T1277
T1278
T1279
T1280
5-13