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Well that escalated quickly!
- g36
- Admiral
- Posts: 1939
- Joined: April 7th, 2014, 6:07 pm
- Vessel Info: 1997 Carver 405
- Location: Soddy Daisy TN.
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Re: Well that escalated quickly!
Crusader xli
The Black Pearl
Soddy Daisy Tn.
- Jlubas
- Scurvy Dog
- Posts: 14
- Joined: June 4th, 2017, 8:54 am
- Vessel Info: 1995 Carver 355 Aft Cabin
- Location: Westbrook, CT
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Re: Well that escalated quickly!
1995 Carver 355 Aft Cabin
Crusader 454 XLI's
- waybomb
- CYO Moderator
- Posts: 2407
- Joined: February 5th, 2013, 9:24 pm
- Vessel Info: 1995 Boston Whaler Rage15
1987 3697 Carver Mariner
1988 Cougar 46 Kevlar Vee offshore
1969 15' Glasspar / 1967 Johnson Electromatic 85
1996 Boston Whaler Rage 15 - Location: Saint Joseph,Mi
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Re: Well that escalated quickly!
Some call those, generically, Racor.
Typically an oil filter looking device with a screw on bowl to catch water on the bottom.
Sometimes that bowl is clear plastic, sometimes metal.
Fred
1969 Glaspar Avalon /1969 Johnson Electromatic 85
1987 Carver Mariner
1988 Cougar Kevlar 46' with triple blown 572 ci
1995 Boston Whaler Rage
Past - 1988 2807, 1989 4207 Aft
- waybomb
- CYO Moderator
- Posts: 2407
- Joined: February 5th, 2013, 9:24 pm
- Vessel Info: 1995 Boston Whaler Rage15
1987 3697 Carver Mariner
1988 Cougar 46 Kevlar Vee offshore
1969 15' Glasspar / 1967 Johnson Electromatic 85
1996 Boston Whaler Rage 15 - Location: Saint Joseph,Mi
- Has thanked: 50 times
- Been thanked: 397 times
Re: Well that escalated quickly!
Fred
1969 Glaspar Avalon /1969 Johnson Electromatic 85
1987 Carver Mariner
1988 Cougar Kevlar 46' with triple blown 572 ci
1995 Boston Whaler Rage
Past - 1988 2807, 1989 4207 Aft
- SanJuanDreamer
- First Mate
- Posts: 170
- Joined: April 4th, 2016, 4:02 pm
- Vessel Info: Still Searching
- Location: Seattle
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Re: Well that escalated quickly!
On my 98 454xLi, there are three on each engine. The Oberg filter, Racor 110 fuel\water filter and the barrel fuel filter.
Start with finding and cleaning\replacing fuel filters.
- Roxanne
- Scurvy Dog
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- Joined: June 8th, 2017, 9:08 pm
- Vessel Info: 1999 Carver 356
- Location: Oakwood GA
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Re: Well that escalated quickly!
- km1125
- Admiral
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Re: Well that escalated quickly!
Roxanne wrote:Source of the post
The starboard engine runs 180-200F. We've replaced the impeller and brought the temp down.
When you "brought the temperature down", did it get down to 180-200, or is it now closer to 160?? (later you say 'engines are running 160 or below').
These are all EFI engines right?? They should not really have vapor lock as the gas is under pressure... different from a carb system where there is little pressure and a vacuum pulling fuel from the tank. Perhaps you have leaking pressure regulators?? Did you ever check fuel pressure on the rail after the engine is shut down?
-
- CYO Supporter
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- Vessel Info: 1989 Carver 3807 Aft Cabin
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Re: Well that escalated quickly!
km1125 wrote:....These are all EFI engines right?? They should not really have vapor lock as the gas is under pressure... different from a carb system where there is little pressure and a vacuum pulling fuel from the tank.....
Not necessarily true. Even on EFI, you can get vapour lock. There's already a vacuum on the suction side of the fuel delivery system which is a contributor to vapour lock. Under normal operating conditions, the amount of vacuum isn't enough to cause the problem, but add enough heat, and the combination of the two on that side will cause issues, hence the introduction of liquid cooled fuel systems like Cool Fuel on Merc EFI apps.
Vapour lock has some very definite symptoms. If the symptoms don't meet the criteria, it's likely not vapour lock but something else. And a hot running engine doesn't necessarily mean you'll have vapour lock or that your engine compartment temps will reach unacceptable levels. Some engines run with 180* stats. I wouldn't say it's a Merc 454 problem. Under the right conditions, it'll happen with any brand. You'll just read more about the Merc 454 because there's more of them out there than all the other brands combined!
- km1125
- Admiral
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Re: Well that escalated quickly!
I suspect that many of these problems would be traced to defective pressure regulators or a problem in the cool-fuel system.
If I had an engine that might be susceptible to a vapor lock condition, I'd consider adding a return fuel line to the tank, or a low pressure pump just after the anti-siphon valve. Maintaining even a slight pressure in the system is one of the big keys into stopping the fuel from vaporizing, just like a radiator cap stops the coolant from boiling.
- mjk1040
- Admiral
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Re: Well that escalated quickly!
I'd Rather Be Boating!
1989 Sea Ray Seville
1986 Carver Mariner 32'
1990's Thompson 22' Cuddy Cabin
1990's 4Winns 245 Vista Cruiser
1980's Thompson 19' Open Bow
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