Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

I have an old Ariens 7 HP snowthrower with a blown engine.  The model#924038, with the engine H70-13021OD. My problem is trying to find a replacement engine.  Ariens had Tecumseh e-mail me that the old engine is unavailable but an 8HP #208102A would be a good replacement.  The only trouble is no on-line is familiar with this part.  The engine has a 1" c/s with 2 13/32" length.  I really don't want to spend  a lot of money to replace an engine for probably an over 20 yr old snowthrower, but when it threw snow it went thru anything.  Can anyone suggest a replacement engine any brand ?

Just an up-date for general knowledge.  This past week-end we had several inches of snow, that was rained on over-night, and turned to thick slush.  Colder weather and the forcast of blizzard conditions made an immediate need to clean what was already down.  The new old Ariens went thru the slush very well,  and the next day the 9 inches of new snow was gone in no time.  I can't tell you how happy I am to have the old (new) Ariens really back in service.  The old machines were built for the ages.