Posted By: BassLakeFork
Yamaha 200 HPDI 2007 - Top End Power - 07/31/16 12:04 PM
Chronic problem with my Yamaha 200 HPDI. The motor occasionally loses top end power almost like it is running on 5 cylinders. It was rebuilt due to a blown power head last year and had similar symptoms before it blew.
The last two one-day fishing trips, it started fine, got on plane fine, but would top out with about 20% less power than usual. Both times I stopped short of my planned destination and fished for about an hour. When I started back up it seemed to run normal the rest of the day - with maybe just a time or two where it sputtered at full throttle for just second which was almost unnoticeable.
I have had all the typical filters, fuel lines, and pump ball replaced. One item excluded from the rebuild last year was the high pressure fuel pump. I have heard there are some filters in the high pressure pump also that are difficult or maybe impossible to replace. Any thoughts here?
The last two one-day fishing trips, it started fine, got on plane fine, but would top out with about 20% less power than usual. Both times I stopped short of my planned destination and fished for about an hour. When I started back up it seemed to run normal the rest of the day - with maybe just a time or two where it sputtered at full throttle for just second which was almost unnoticeable.
I have had all the typical filters, fuel lines, and pump ball replaced. One item excluded from the rebuild last year was the high pressure fuel pump. I have heard there are some filters in the high pressure pump also that are difficult or maybe impossible to replace. Any thoughts here?