Melted a piston?
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Re: Melted a piston?
Sorry to hear that Gary. I always try to be optimistic. In this case, at least the thing didn't come apart. I'd concentrate on making sure that I found out exactly what caused the problem. Good luck! Lou
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Re: Melted a piston?
Gary,
this is one thread from my Good Friday holed piston. http://www.offshoreonly.com/forums/s...gine+tech+guys
Near the end you will see the cause of just one lean cylinder.
Dont think this would apply in a blower setup, but vacuum leak seems like a possibility.
this is one thread from my Good Friday holed piston. http://www.offshoreonly.com/forums/s...gine+tech+guys
Near the end you will see the cause of just one lean cylinder.
Dont think this would apply in a blower setup, but vacuum leak seems like a possibility.
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Re: Melted a piston?
Fortunately it's not my boat or money paying for it. Belongs to a friend, but he's not too mechanically inclined so I do most of his wrenching.
BTW, the problem was due to lack of fuel pressure. He ran it out of gas at WOT! Leaned out on the 1,2,&7 pistons, melting them. Inaccurate fuel guage, he said. Very expensive lesson for a boat he only ran 2 hrs.
BTW, the problem was due to lack of fuel pressure. He ran it out of gas at WOT! Leaned out on the 1,2,&7 pistons, melting them. Inaccurate fuel guage, he said. Very expensive lesson for a boat he only ran 2 hrs.
Originally Posted by Lmarth
Sorry to hear that Gary. I always try to be optimistic. In this case, at least the thing didn't come apart. I'd concentrate on making sure that I found out exactly what caused the problem. Good luck! Lou
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Re: Melted a piston?
I have an adjustable low fuel pressure switch that u can get from a speed shop that deals in NOS. Normally open switch that I have set for 4.5lbs add into the Mercruiser alarm system. I also added an auto style backup beeper to the mercruiser buzzer so that I can hear it at speed. Cheap insurance.
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Re: Melted a piston?
Good idea. I can get 5psi marine hobbs switches for about $10 and wire to the alarm.
Originally Posted by Wobble
I have an adjustable low fuel pressure switch that u can get from a speed shop that deals in NOS. Normally open switch that I have set for 4.5lbs add into the Mercruiser alarm system. I also added an auto style backup beeper to the mercruiser buzzer so that I can hear it at speed. Cheap insurance.
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Re: Melted a piston?
[QUOTE=Gary Anderson]
BTW, the problem was due to lack of fuel pressure. He ran it out of gas at WOT! QUOTE]
That was yesterday I have to keep reminding myself to go back and read original post, easy to forget the facts.
BTW, the problem was due to lack of fuel pressure. He ran it out of gas at WOT! QUOTE]
That was yesterday I have to keep reminding myself to go back and read original post, easy to forget the facts.
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Re: Melted a piston?
Originally Posted by Gary Anderson
Good idea. I can get 5psi marine hobbs switches for about $10 and wire to the alarm.
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Re: Melted a piston?
Just found the installation sheet
Nitrous Oxide Systems
part #
15660 adj 4-7psi
15750 5psi
15680 adj 14-24 psi
15685 adj 25-50 psi
Normally open switches, about $37 jegs etc.
1/8" pipe thread
Nitrous Oxide Systems
part #
15660 adj 4-7psi
15750 5psi
15680 adj 14-24 psi
15685 adj 25-50 psi
Normally open switches, about $37 jegs etc.
1/8" pipe thread
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Re: Melted a piston?
Thanks,
I would have more confidence in that over a $10 sierra part.
Gary
I would have more confidence in that over a $10 sierra part.
Gary
Originally Posted by Wobble
Just found the installation sheet
Nitrous Oxide Systems
part #
15660 adj 4-7psi
15750 5psi
15680 adj 14-24 psi
15685 adj 25-50 psi
Normally open switches, about $37 jegs etc.
1/8" pipe thread
Nitrous Oxide Systems
part #
15660 adj 4-7psi
15750 5psi
15680 adj 14-24 psi
15685 adj 25-50 psi
Normally open switches, about $37 jegs etc.
1/8" pipe thread
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Re: Melted a piston?
Gary, I can feel the pain
Ijust did the same thing to my newly Procharger 454Mag.
The strange this was that I didn't lose a whole lot of power.
Just pulled my piston out this AM. I burned a hole thru #5 exhaust valve, tuliped what was left, cracked exhaust seat, started burning thru the pistion and scored the bore.
I'm gonna end up lucky because I can get away with just honing the cylinder.
Just sent my carb to Dean, so that will be the majority of this lesson $$$.
Mo
Ijust did the same thing to my newly Procharger 454Mag.
The strange this was that I didn't lose a whole lot of power.
Just pulled my piston out this AM. I burned a hole thru #5 exhaust valve, tuliped what was left, cracked exhaust seat, started burning thru the pistion and scored the bore.
I'm gonna end up lucky because I can get away with just honing the cylinder.
Just sent my carb to Dean, so that will be the majority of this lesson $$$.
Mo
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