Max123
Well-Known Member
Ended up working on the old Mastercraft ski boat while in the Okanagan (5.7/350 TBI motor).
Started to give me some problems last week of the summer holidays. Th boat should be good for +45mph @ 4500rpm, but was topping out at less than 4000rpms with no load, and bogging down at lower speeds when under load (we discovered this when trying to pull me out of the water on a slalom ski).
Replaced the high pressure fuel filter (no effect), and replaced the spark plugs (some good effect), but ran out of time. Its 24 years old, but only has 400 hours on it. Even though it only gets 10-15hrs a year I'm pretty religious about fluid changes, but have let some of the other maintenance items slide. Next up are the wireset + cap/rotor - also going to buy an OBD1 scan tool. These motors are know for fuel pump issues (has a mesh inlet screen that gets clogged) - so that is likely coming off as well over the winter and will buy a fuel pressure gauge. Annoyed with myself that I couldn't fix it while still in the water.
Started to give me some problems last week of the summer holidays. Th boat should be good for +45mph @ 4500rpm, but was topping out at less than 4000rpms with no load, and bogging down at lower speeds when under load (we discovered this when trying to pull me out of the water on a slalom ski).
Replaced the high pressure fuel filter (no effect), and replaced the spark plugs (some good effect), but ran out of time. Its 24 years old, but only has 400 hours on it. Even though it only gets 10-15hrs a year I'm pretty religious about fluid changes, but have let some of the other maintenance items slide. Next up are the wireset + cap/rotor - also going to buy an OBD1 scan tool. These motors are know for fuel pump issues (has a mesh inlet screen that gets clogged) - so that is likely coming off as well over the winter and will buy a fuel pressure gauge. Annoyed with myself that I couldn't fix it while still in the water.
