Hi!..........
All good ideas, but check the 700/900 faq....the engines and trannys are the same......ATF flush is a great idea..the dealer recommendation is to drop the drain plug every 20k, and replace the 2.7 (or so) qts. that drain out...but a flush is better.....yours probably has been changed at some point...( i hope!!!!)...good procedure in the faq....2. fuel injectors...dunno...i suppose they could use a cleaning........i've had a few 240's over 200k and never did more than throw in a bottle of Techron every once in a while...(another product BGK44 or something like that)is also supposed to be good...again more info in the faq.........3. cleaning the TB is a great thing to do....not hard..but go slow ...follow the steps in the faq.....gasket is cheap and easy ...be careful if it sticks...scrape off gently....be careful with the connector to the throttle cable...little plastic snap connector....again, more info in the faq.........good luck...........................j.