Raider 50 HP TLDI, Service Manual

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11-6
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damaged head gasket
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damaged pistons
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broken or stuck piston rings
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scored cylinder walls.
IF IF IF IF the engine has equal compression and runs normally, continue the tune-up procedure.
3. Clean and regap or replace spark plugs. Make certain ceramic portion of plug is not cracked. Make certain ceramic portion of plug is not cracked. Make certain ceramic portion of plug is not cracked. Make certain ceramic portion of plug is not cracked. Replace if cracked to Replace if cracked to Replace if cracked to Replace if cracked to
prevent sparks. prevent sparks. prevent sparks. prevent sparks.
4. Inspect ignition components. Replace deteriorated or damaged parts such as wires, boots, etc., which may emit sparks. Replace deteriorated or damaged parts such as wires, boots, etc., which may emit sparks. Replace deteriorated or damaged parts such as wires, boots, etc., which may emit sparks. Replace deteriorated or damaged parts such as wires, boots, etc., which may emit sparks.
5. Replace deteriorated or damaged fuel system parts such as hoses or gaskets which may result Replace deteriorated or damaged fuel system parts such as hoses or gaskets which may result Replace deteriorated or damaged fuel system parts such as hoses or gaskets which may result Replace deteriorated or damaged fuel system parts such as hoses or gaskets which may result in fuel leaks. in fuel leaks. in fuel leaks. in fuel leaks.
6. Check the throttle linkage.
7. Inspect propeller shaft seals for evidence of leakage. Replace if necessary.
8. Drain and refill gear case. Lubricate all components of engine. See Gear caseLubrication Gear caseLubrication Gear caseLubrication Gear caseLubrication.
9. Check propeller condition. Replace if damaged.
10. Retorque all screws and nuts to specifications.
11. Run engine in test tank with correct test propeller. Check cooling system operation.
Anodes Anodes Anodes Anodes ---- Testing and Replacement Testing and Replacement Testing and Replacement Testing and Replacement
Anodes protect the outboard from galvanic corrosion.
Erosion or disintegration in sea or brackish water indicates the anodes are performing their function. The anodes should
be inspected at intervals and replaced when necessary or corrosion of the engine will increase. If any anode has been
reduced to 2/3 its original size (1/3 eroded) it must be replaced*
To test for proper installation of the anode. Set an ohmmeter to low ohms scale. Connect one lead of the ohmmeter to a
powerhead ground and the other lead to the anode. Be sure surface of the anode is clean to make good contact.
Ohmmeter should indicate a very low reading (zero). If not, remove the anode and clean the area where the anode is
installed. The mounting screws and the anode itself should also be cleaned. Install and retest. Never paint or coat the
anodes or their mounting surfaces, as this will prevent them from functioning properly.
When taking Raider When taking Raider When taking Raider When taking Raider Out of Storage Out of Storage Out of Storage Out of Storage and back into and back into and back into and back into Service Service Service Service
1. Check gear case lubrication. If leakage is evident, gear case seals may need attention. See Gear case Gear case Gear case Gear case
Lubrication Lubrication Lubrication Lubrication in this section.
2. Apply a light coating of Electrical Grease to the ribbed portion of the spark plug ceramics and the
opening of the spark plug covers. Connect spark plug leads. Make sure spark plug boots are not cracked Make sure spark plug boots are not cracked Make sure spark plug boots are not cracked Make sure spark plug boots are not cracked
or torn or torn or torn or torn.
3. When engine is reattached to the boat's transom, make sure the mounting brackets, clamps, and , make sure the mounting brackets, clamps, and , make sure the mounting brackets, clamps, and , make sure the mounting brackets, clamps, and
hardware are structurally sound and in proper working condition. hardware are structurally sound and in proper working condition. hardware are structurally sound and in proper working condition. hardware are structurally sound and in proper working condition. If mounting components use the wrong
fasteners, are carelessly installed, or are defective, sudden unexpected loss of engine and boat control
may result.
4. Check for evidence of water in the oil tank. Do not operate the engine if water is present in the oil tank.
Serious powerhead damage can occur.