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Yes, I’m not good at linking pages on here but if you go to the main Ohlsson Rice page there is a section title Brochures, etc that has parts list and other info. I looked up that part number and it looks like it’s the Roller Retainer for the later 13B engine. Go to this page and pull up the info on the 1970s engine.

Our old website host no longer is around so we had to start over and redo our site. Here is the current link to my wife's O&R collection Jen's O&R Collection

Had this in storage, brought it back home last week (before the lockdown), only got it out of the box this afternoon Its an Amp Champ Generator with an Italian Fox F7 engine in it, the last two photos show it with my Ohlsson Rice powered version...

If the exhaust collector will not move, the cylinder will need to be unscrewed. But make sure the piston is free to move before trying this, as the con-rod will break if the piston is stuck. The engine maintenance manual gives details on making a cylinder removal tool. The instructions given are to make it from a piece of flat steel 3/16" thick & 1" square, with a hole drilled in the middle for using a screwdriver as a "T" handle. I made one from a piece of steel & bar found in a box of offcuts & salvaged bits in the shed. I didn't bother to make it 1" square though, I only squared up the ends and drilled the hole for the bar. If the cylinder is very tight I usually use a vice to hold the engine crankcase (use wood or similar to protect the engine from the vice jaws) and use an adjustable spanner to turn the tool. You will probably need to replace the gaskets if you remove the cylinder to prevent leaks. Also make sure that the slot in the top of the cylinder lines up with the crankshaft or is at 90 degrees to the crankshaft when reassembling. Here is a picture of the cylinder removal tool I made. David

Here is a link to my wife's O&R collection. She also has a Tiny Tiger (not pictured) that is partly disassembled. It all started with the yellow pump (Type 217) that a friend of her grandfather gave me. Jen's O&R Collection