Yamaha 300 PROBLEMS

[saltyreels]

Does anyone have on of the 300 Yamaha HPDI motors that can tell me what is causing the rough running, it will cut of or just start missing and then clear up, it appears to be doing it more when coming up on plane although it did just cut off the other day when trolling @ 1000 RPM, but most of my trouble is coming from getting the boat up on plane and once it is on plane it will run fine until I slow down and go to speed back up again.

[john latham]

Try going to www.thehulltruth.com and do a search there for yamaha 250/300 hpdi. There have been alot of problems with that hpdi big block that have discussed there. If you don't find what your looking for, ask.