I used a stubby 22 mm wrench and also took off on of the lines adjascent to the primer pump. I dunno if that'll help but it worked for me.

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http://www.libertyagrifuels.com
1984 300D Turbo
1980 300SD Sold
1983 300TD Sold
Dagger 16 ft. Legend Canoe (for the weekends)
Marin Northside Trail Mtn. Bike