2005 Mercury Optimax 225 Block Crankcase Powerhead. Removed from a running motor. Turns freely. Compression is 105-115 psi.Please look at all the photos as the last six show the compression readingsCondition is "Used". Due to weight this will be shipped by UPS or FedEx freight. Likely between 0 and 0 depending on your location.Please contact me for a freight quote.