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Crusader 6.0 dying once hot
- Scott892
- Scurvy Dog
- Posts: 9
- Joined: January 26th, 2021, 8:12 pm
- Vessel Info: 2007 Mariner 360
Crusader 6.0 - Location: Chicago
- Been thanked: 2 times
Crusader 6.0 dying once hot
So I did the most obvious, replaced the high and low pressure fuel pump, replaced all fuel filters, replaced fuel pressure regulator and relays. Still happening, didn't fix it.
Mechanic was kinda stumped and said his next move would be to insulate the entire port fuel line as he speculated that perhaps it was overheating and boiling the fuel causing vapor lock.
I've already spent $2K on this so I really don't want to keep guessing. Any ideas? It's a Crusader 6.0, 2007 with about 550 hours.
- RobGunn
- Deck Hand
- Posts: 62
- Joined: September 27th, 2017, 3:08 pm
- Vessel Info: 1990 Carver 3607 Aft Cabin
"FINALLY" - Location: St. Joe MI
- Been thanked: 21 times
Re: Crusader 6.0 dying once hot
- Scott892
- Scurvy Dog
- Posts: 9
- Joined: January 26th, 2021, 8:12 pm
- Vessel Info: 2007 Mariner 360
Crusader 6.0 - Location: Chicago
- Been thanked: 2 times
Re: Crusader 6.0 dying once hot
I'm not original owner and it's been doing it for the 3 years I've owned it but gotten worse. First year was only couple times so I just shrugged it off. Pretty much happening every time I take it out now.
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- CYO Supporter
- Posts: 5819
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
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Re: Crusader 6.0 dying once hot
Insulating the fuel line without taking some readings or inspecting things carefully might be a waste of time and money. It can also be caused by a restriction in the suction line such as a collapsed line, a kink, extra filters on the suction side, fuel monitoring accessories, etc. If one of these is the cause, insulating won't do a thing except empty your wallet more. Before they ASSUME anything, they should take a vacuum reading and take temp readings to see if vapor lock is even a consideration. If it's a vacuum issue, then insulating won't do a thing, but it would make a difference if temp readings point out that the compartment/fuel is getting too hot.
- Scott892
- Scurvy Dog
- Posts: 9
- Joined: January 26th, 2021, 8:12 pm
- Vessel Info: 2007 Mariner 360
Crusader 6.0 - Location: Chicago
- Been thanked: 2 times
Re: Crusader 6.0 dying once hot
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- CYO Supporter
- Posts: 5819
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
- Has thanked: 432 times
- Been thanked: 1595 times
Re: Crusader 6.0 dying once hot
Is your low pressure pump attached to the side of the Fuel Control Cell or is it mounted away from the FCC?Scott892 wrote:Source of the post..... replaced all fuel filters.....
I take it your application does not have the Oberg fuel filter (hockey puck type assembly)? If it does, did it get addressed?
- bud37
- Admiral
- Posts: 4689
- Joined: April 23rd, 2015, 10:22 pm
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Re: Crusader 6.0 dying once hot
Scott892 wrote:Source of the post Rob, thanks yeah I agree. The mechanic checked the fuel tank pick up and said it was welded to the tank so he couldn't remove but cap vent is an idea.
That sounds odd....those fittings are screwed into the welded bung but can be removed. Be careful the threads are aluminum and may have become galled previously.
Did your mechanic check the anti siphon valve? I think the port engine has a much shorter fuel feed from the tank than the starboard side.
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