NO. The FS90 is a 4mix engine and the carb has a (sump) on it which has a pulse pipe going to the bottom of the crank. The FS45 is a totally different carb configuration, and doesn't have the sump. FS90 carb is an C1Q-131A
The FS45 has several carbs that fit:- C1Q-S97 C1Q-S71 C1Q-S66 C1Q-S58 C1Q-S44A C1Q-S53A
Answers & Comments
NO. The FS90 is a 4mix engine and the carb has a (sump) on it which has a pulse pipe going to the bottom of the crank. The FS45 is a totally different carb configuration, and doesn't have the sump. FS90 carb is an C1Q-131A
The FS45 has several carbs that fit:-
C1Q-S97
C1Q-S71
C1Q-S66
C1Q-S58
C1Q-S44A
C1Q-S53A