Specifications Needed 85 115hp Johnson

[licketdsplit756]

Finding All Kind Of Sites For Parts. But What Im Looking For Is Specs On My Engine I Need To Know What Size The Pistons Are? And The Bore Of The Sleeve So As To Know How Much Wear There May Be. Any Ideas As Where To Find This Info? Or Maybe Someone Hear Knows Of This. I Can Get Used Piston After I Know The Size. Also Need A Head 1985 Johnson 115 Hp J115tlcos. For The First Time In My Life After Owning 13 Boats.. I Finally Beginning To Understand Them. This Is My Very First Project On A Boat Motor. And Really Enjoying It. Ty All For The Help.

 

[Dhadley]

Re: Specifications Needed 85 115hp Johnson

The standard bore is 3.500". Pistons come standard, .020, .030, .044 and .064 over. A good marine machine shop will know what to bore it to once you tell them what pistons you're getting. All this info is in the service manual. Do not attempt a rebuild without a manual. An OE manual is best.

Avoid automotive machine shops unless they have done outboards for a number of years.

Avoid used pistons.

The part number of the head is cast into it. Look at the number on the GOOD head and get the mate to it. The bad head you have now may or may not be the mate. The port head is one number lower than the starboard head. Again -- don't worry about the number on the bad head. Get the mate to the good head.