Yamaha 50hp Piston Installation

DRywak

Recruit
Joined
Jul 5, 2002
Messages
3
Help! Please advise if a special tool is available or needed to install pistons from the crankshaft side on '84 Yamaha 50hp motor. If tool not available, please advise what procedure to follow.
 

DRywak

Recruit
Joined
Jul 5, 2002
Messages
3
Re: Yamaha 50hp Piston Installation

How do we compress the piston rings during the installation from the crankshaft side? Standard ring compressors will not work. Please advise.
 

Forktail

Ensign
Joined
Feb 11, 2002
Messages
977
Re: Yamaha 50hp Piston Installation

Usually the pistons are installed from the head side while attached to the connecting rod, and then bolted to the crank via the rod cap. It is unusual to install the pistons on the crank side. Again why?<br /><br />Regardless, you can use your fingers, or two small flat tipped screw drivers (brass tipped if possilbe). A ring compressor won't work becasue of the block design and because the crank is probably in the way.
 
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