Onan First Star Sensor Master 300-1625. Thereare no instructions for this part. This one is a pull-off. It has been tested. I'm told we do have new, old stock ones as well--it's just a matter of putting our hands on them.
This item listed for $600 in 2007, so I've given a substantial discount off of that and I'm accepting best offers that I will pass along to the person for whom I sell these parts.
Because of the sensitive nature of these electronics, insurance is included in the cost of shipping.
Anyone that is buying it should have the abiltiy and knowledge to do some testing. You should immediately test it upon receiving and let me know if there is a problem. Otherwise it's being sold 'as is, no returns' because it is so easy for DIYers to fry these boards. I'm a reasonable person and so is the guy I sell for, but we are not providing $600 boards for free so that people can learn from their mistakes!
If you are unsure if this is a fit for you, send me your model number and spec and I can verify it.