On Wed, 04 May 2011 14:46:54 -0400, Gogarty
wrote:

I just ordered the vacuum pump today, from Harbor Freight. $100 plus tax and
shipping. I don't have the guage set. Way cheaper than a service call and I
might even be able to rent it out at the marina.

You really need a gauge set also to properly use the vacuum pump and
recharge the system. The valves on the gauge set allow you to vacuum
both the high and low pressure side at the same time, and then seal
off the high pressure side, purge the low pressure hose and recharge.
It is important to do things in the right sequence to avoid exploding
the recharge can and/or reintroduce moisture to the system. The gauge
set also gives you an indication that the system is fully charged.
Be careful not to overcharge - you can damage the compressor.