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Motor is a 2005 DF200Z. 320 hours. On a 20 foot catamaran.
Normal max rpm is about 6000 for me.
My last 2 trips I have had a hard time getting up to 4000 rpm.
Boat starts fine. Does not sputter or spit. Just maxes out at 4000.
What I have done so far: Changed low pressure fuel filter, changed water separator filter, and changed external fuel lines and primer squeeze bulb. Internal lines look and feel fine, no flaking or collapsing.
I pumped fuel into glass and saw no debris, no water. Low pressure filter bowl fills with no problem. Primer bulb pumps up tight and is in proper orientation according to instructions. Fuel pumped directly from tank has no flow issues and looks clear. No sediment in glass jar.
Boat is a cat and draws off both tanks by design to maintain level attitude. I gave the faulty anti-siphon valve a thought but that would mean both tanks are having same problem at same time. Seems unlikely.
Anything else I should look into before I take it to service tech? I am really not sure I want to tackle the high pressure side of the fuel delivery system.
Merritt Marine in Hillsboro, NC is closest to me by 50 miles. Any experience with them that you could share would be appreciated as well.
This is my first 4 stroke outboard. I have had several I/O and about 40 years of experience with working on boats.
Any advice would be greatly appreciated. I am missing out on a lot of striper right now. Plus my kids want me to take them skiing.
Normal max rpm is about 6000 for me.
My last 2 trips I have had a hard time getting up to 4000 rpm.
Boat starts fine. Does not sputter or spit. Just maxes out at 4000.
What I have done so far: Changed low pressure fuel filter, changed water separator filter, and changed external fuel lines and primer squeeze bulb. Internal lines look and feel fine, no flaking or collapsing.
I pumped fuel into glass and saw no debris, no water. Low pressure filter bowl fills with no problem. Primer bulb pumps up tight and is in proper orientation according to instructions. Fuel pumped directly from tank has no flow issues and looks clear. No sediment in glass jar.
Boat is a cat and draws off both tanks by design to maintain level attitude. I gave the faulty anti-siphon valve a thought but that would mean both tanks are having same problem at same time. Seems unlikely.
Anything else I should look into before I take it to service tech? I am really not sure I want to tackle the high pressure side of the fuel delivery system.
Merritt Marine in Hillsboro, NC is closest to me by 50 miles. Any experience with them that you could share would be appreciated as well.
This is my first 4 stroke outboard. I have had several I/O and about 40 years of experience with working on boats.
Any advice would be greatly appreciated. I am missing out on a lot of striper right now. Plus my kids want me to take them skiing.
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