13 EASY STEPS TO REBUILDING A 2-STROKE CYCLE MARINE ENGINE

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Whether you are a 2-stroke cycle engine owner or a marine engineer, there comes a time when you need to rebuild your 2-stroke marine engine either in your maintenance schedule or due to an unplanned engine failure. While two-stroke engines are relatively simple mechanical devices, rebuilding them requires knowledge of how they work, attention to detail, and a systematic approach.

Here are 13 easy steps to rebuilding, repairing or overhauling a 2-stroke cycle engine on board a marine vessel:

1 | Washing the parts
Washing the parts is a process that includes decarbonizing of engine block, piston, top cylinder head, blower, skirting, sump, and every other accessories in preparation to rebuilding an engine.

2 | Bedding of the crank shaft
Bedding of the crank shaft has to do with loosening of the main bearing – extracting the old shell bearing, inspecting and installing a new one according to its part number.
After installation, ensure to retighten the main bearing bolt according to its specification.

3 | Refurbishing of cylinder head
Refurbishing of cylinder head is a very vital step with the following procedure:
• Dismantling of rocker arm bracket
• Dismantling of cam-follower
• Extraction of rocker arm
• Extraction of poppet valve
• Extraction of poppet valve oil seal
• Decarbonizing of top cylinder head and its accessories
• Pressure testing of cylinder head
• Inspection of poppet valve, valve guide and poppet valve seat insert.

4 | Bursting of rings
After decarbonizing the piston, the next step is to inspect the piston groove before installation of new rings by:
• Picking up ring pack
• Opening and checking it out for the rings.
• Separate the rings and check out for the mark.

5 | Installation of piston to sleeve
When done with rings installation, turn… To complete reading, click on http://www.ugpeotechnique.com/Rebuilding-A-Marine-Engine.html

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