Reed Block Housing; Connecting Rods - Mercury 150 EFI Service Manual

POWERHEAD

Reed Block Housing

1. Check rubber bleed hoses. Replace any hose that is cracked, cut or deteriorating.
2. Check operation of bleed system check valves in reed block housing. If valves are work-
ing properly, air can be drawn thru check valves "one way" only. If air can pass thru a
check valve both ways, valve is not working properly and must be replaced.
3. Check that bleed system check valves are pressed tight into reed housing.
4. Inspect passages in reed block housing to be sure that they are not obstructed.

Connecting Rods

1. Check connecting rods for alignment by placing rods on a surface plate. If light can be
seen under any portion of machined surfaces, if rod has a slight wobble on plate, or if
a 0.002 in. (0.051 mm) feeler gauge can be inserted between any machined surface and
surface plate, rod is bent and must be discarded.
2. Overheating: Overheating is visible as a bluish bearing surface color that is caused by
inadequate lubrication or excessive RPM.
3. Rust: Rust formation on bearing surfaces causes uneven pitting of surface(s).
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90-883728 JULY 2001