I work on few HPDI's. Like whats been previously said, the bigger engines(250-300) were the ones that give issues. The smaller ones seem to hold up well. But keep in mind, they are exspensive to run. Plugs are $$$ just like any DFI, the $300 high pressure fuel filter is now down to $90 and Yamaha DFI oil is expensive. Savings in fuel get eaten up by oil cost. I think they only offer the 150 HPDI now for the bass boat market. You don't see that many around any more. If you have high pressure fuel pump issues, its big money to have it rebuilt, even bigger to have it replaced, like over $2000 for some models. Like most new engines, they are intolerant of crappy fuel, but HPDIs are even more so. You don't see many getting rebuilt due to the preventative expenses to insure they stay together. Good motors, but its a gamble with high stakes
|