- Joined
- Dec 13, 2008
- Messages
- 20
Hello Everyone,
I am working on a 650 engine (18-97876) that I acquired partially assembled. Once the cylinders were installed the engine would not turn over and seems to have 2 different interference positions. at BDC the pistons touch the flywheel, and mid stroke I feel a hard stop when the rods hit the side of the cylinder.
The cylinder casting # is 18773, it only has a slight relief for the rods, not a full notch like a commando.
Also the flywheel has no reliefs in the center section and a H stamped at the top center.
It looks like I will be trimming the bottom of the pistons, and relieving the cylinders. Does anyone have insight on piston dimensions ( roughly how much I need to remove) and why the cylinder is interfering with the rods? Is the cylinder from a older short stroke model? Same with pistons? (only marked ID3 on top)
I have a commando cylinder to measure the notch cut out, thinking I will copy that.
Thanks in advance everyone, this is a great resource.
I am working on a 650 engine (18-97876) that I acquired partially assembled. Once the cylinders were installed the engine would not turn over and seems to have 2 different interference positions. at BDC the pistons touch the flywheel, and mid stroke I feel a hard stop when the rods hit the side of the cylinder.
The cylinder casting # is 18773, it only has a slight relief for the rods, not a full notch like a commando.
Also the flywheel has no reliefs in the center section and a H stamped at the top center.
It looks like I will be trimming the bottom of the pistons, and relieving the cylinders. Does anyone have insight on piston dimensions ( roughly how much I need to remove) and why the cylinder is interfering with the rods? Is the cylinder from a older short stroke model? Same with pistons? (only marked ID3 on top)
I have a commando cylinder to measure the notch cut out, thinking I will copy that.
Thanks in advance everyone, this is a great resource.