Worst case planning for a vintage 820 Bobcat - Snowblower Forum : Snow Blower Forums
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post #1 of 1 Old 01-30-2019, 10:49 AM Thread Starter
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Worst case planning for a vintage 820 Bobcat

Finally picked up my dad's circa 60s 820 with a 3.5 Lauson/Tecumseh engine (HR36-P). When this last ran about a decade ago, it had carb problems that sounds like a bad carb float needle ( gas leaking out of top of carb).
So far as I've been able to determine, this engine is a "souped up" version of an H20 but with a gear reduction. Not been able to find a manual for the HR engine, but H20 manuals abound. My hope is that the needle from an H20 engine will fit and solve the problem. The engine turns easily with a pull on the cord and has compression. So my question... According to a data base if found on this forum, Bobcat only used the 3.5HP engine one year (1961). In successive years they went to 4 and then 5 hp engines. What was changed between the 3.5 and 4 and 5 HP versions of this snowblower? If I can't fix this engine and need to repower, I'd consider a 4 or 5 HP, however, I'd need one with a (6:1) reduction. I'm willing to do this , however not if I have to make a lot of other changes to the snowblower
Robert A Fierro is offline  
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