(ET) Snowblower issue: Pivot bolt bad?

[Chris Zach <cz alembic crystel com>]

While blowing snow last weekend I heard more noise from the chain than 
is normal. So today I took the access port above the chain and motor off 
and peered in.

The chain feels pretty loose. More interestingly though is that when I 
press the chain down to check slack the motor moves inward. It looks 
like the pivot bolt isn't holding the motor back properly, is this 
normal and if not is it a replace the bolt thing or a major repair on 
the frame thing?

Chris