First time posting on this forum. I am a volunteer for a 501c3 non-profit. A group of folks are working on a Ken Bar Whirlwind with an original H40 engine. The aluminum cylinder walls are scored beyond repair from possible cracked ring(s). The crankcase/valve guide breather is expelling small amounts of oil mist, much more than we feel is usual. We are wanting to keep the engine in service. I have done some searching for shops that sleeve the block, but have been unsuccessful at sourcing the parts required for a complete re-build. The valve seats look kind of like they were pressed-in and we wonder if they have the meat for hone work. The valves might be salvaged, but we are unsure about the condition of the valve guides. I have read that there is a Tecumseh H40 shop manual that has specs for internal part wear amounts.
Thanks in advance for the advice and guidance,
SAT
Thanks in advance for the advice and guidance,
SAT