1978 Mercury 900 90HP possible bad trigger. Will this one work?

[talbee]

Here's a link for the part I'm looking at. Just needing to know if this will work?

http://www.ebay.com/itm/222099350029...xe=exe,ext=ext

 

[Faztbullet]

Sorry but don't think so as economizer housing is different as it for KA style carbs and if I remember it is longer...