Hi. I have a Yamaha 150hp HPDI outboard and a Yamaha 4 stroke 4 hp kicker I use for a backup and for trolling. The 4hp has a 1/2 gal tank in it. I'd like to tie it to the main fuel tank. I understand I should use a valve so when the 150 is running it will not try to suck from the kicker. I...
