TOHATSU MFS 8B Service Manual page 100

3. Check diaphragm
replace if necessary.
4. Check check valve
replace if necessary.
5. fuel pump body for crack and damage, and replace if
necessary.
6. Check push rod
replace if severely worn.
7. Clean fuel pump body.
To achieve higher tightness of gasket, wet
interior of fuel pump with small amount of
gasoline.
1. Attach diaphragm spring, and then diaphragm to fuel pump
body.
· While holding push rod, turn diaphragm
approximately 90 degrees to left or right while
pushing it using a finger to attach it to push rod.
· After attaching the part, check if it can be moved
smoothly by pushing push rod using a finger.
2. Assemble check valve using rubber (black), plastic (semi-
transparent) and then plate (white) in this order.
Set plate with its notch brought to projection of
fuel pump body.
4-16
for break, crack and damage, and
for damage and deterioration, and
for wear on the slipper surface , and
4st 8/9.8 2016