454 issue

« **on:** May 11, 2015, 10:00:47 AM »

was cruising up the river to the avi on Saturday when my motor shut off. right before it shut off my temp and oil pressure were perfect. it just shut off. no knock or pop. thought I ran out of fuel. popped the hatch to find steam coming from breathers and carb. pulled dipstick and my oil level was good, and started to steam out the stick hole. tried to start it to get to a beach but she would not turn over. where should I start? motor was rebuilt a year ago and has 22 hours on it.

« **Reply #1 on:** May 11, 2015, 10:21:34 AM »

Quote from: 93_ultra on May 11, 2015, 10:00:47 AM

was cruising up the river to the avi on Saturday when my motor shut off. right before it shut off my temp and oil pressure were perfect. it just shut off. no knock or pop. thought I ran out of fuel. popped the hatch to find steam coming from breathers and carb. pulled dipstick and my oil level was good, and started to steam out the stick hole. tried to start it to get to a beach but she would not turn over. where should I start? motor was rebuilt a year ago and has 22 hours on it.

Ouch! Could vapor lock be a possibility?

Sent from my iPhone using SoCal Jet Boats

« **Reply #2 on:** May 11, 2015, 10:27:05 AM »

Quote from: Rooster454 on May 11, 2015, 10:21:34 AM

Ouch! Could vapor lock be a possibility?

Sent from my iPhone using SoCal Jet Boats

I'm going to pull the plugs and check for water. what would cause vapor lock?

« **Reply #3 on:** May 11, 2015, 10:38:32 AM »

What were the volts reading before shut off? Did it crank at all when you tried again?

Sent from my iPhone using SoCalJetBoats

« **Reply #4 on:** May 11, 2015, 10:43:30 AM »

That happened on my uncle's boat. The jet seized. He was sure he lost his motor when it happened. See if you can disconnect the driveline, remove the plugs, and carefully spin the motor over with hand tools. Or at least look at your impeller through the intake and see if your impeller looks normal. That's where I would start. Best of luck to you!

SCJB iPhone

« **Reply #5 on:** May 11, 2015, 11:24:37 AM »

Quote from: carrera202 on May 11, 2015, 10:38:32 AM

What were the volts reading before shut off? Did it crank at all when you tried again?

Sent from my iPhone using SoCalJetBoats

hey wes give me a call.

« **Reply #6 on:** May 11, 2015, 11:25:59 AM »

Quote from: Roadrunner on May 11, 2015, 10:43:30 AM

That happened on my uncle's boat. The jet seized. He was sure he lost his motor when it happened. See if you can disconnect the driveline, remove the plugs, and carefully spin the motor over with hand tools. Or at least look at your impeller through the intake and see if your impeller looks normal. That's where I would start. Best of luck to you!

SCJB iPhone

I'll check that out. thanks!

« **Reply #7 on:** May 11, 2015, 11:27:26 AM »

Yup sounds a lot like a pump failure.

Sent from my SCH-I545 using SoCal Jet Boats mobile app

« **Reply #8 on:** May 11, 2015, 11:49:13 AM »

Even though the temp gauge indicated normal temperature, did the engine feel excessively hot when you opened the hatch?

You didn't mention any milkshaked oil when you pulled the dipstick, so far, so good.

Start with the basics, verify that you have fuel, spark, and compression.

I would also check for flow obstructions inside the engine. Back flushing might dislodge debris.

Good luck,

Joe

« **Reply #9 on:** May 11, 2015, 01:32:28 PM »

so I found part of my problem. all my other plugs look good except for this one. I will pull the valve cover off later today and see what happened.

« **Reply #10 on:** May 11, 2015, 01:53:43 PM »

Quote from: 93_ultra on May 11, 2015, 01:32:28 PM

so I found part of my problem. all my other plugs look good except for this one. I will pull the valve cover off later today and see what happened.

Going to need to pull a bit more than a valve cover.

I'm thinking head.

GT

Sent from my SCH-I545 using SoCal Jet Boats mobile app

« **Reply #11 on:** May 11, 2015, 06:07:34 PM »

pulled the valve cover. found some valve seal pieces up on the head. bo appearant valve damage from the top side.

« **Reply #12 on:** May 11, 2015, 06:24:54 PM »

Quote from: 93_ultra on May 11, 2015, 06:07:34 PM

pulled the valve cover. found some valve seal pieces up on the head. bo appearant valve damage from the top side.

Pull the head.

« **Reply #13 on:** May 11, 2015, 09:18:05 PM »

Quote from: GT Jets on May 11, 2015, 06:24:54 PM

Pull the head.

well there it is!

« **Reply #14 on:** May 11, 2015, 10:02:18 PM »

Ouch, that's not good

Sent from my garage drinking a cold PBR

« **Reply #15 on:** May 11, 2015, 10:02:34 PM »

That's not good

Sent from my iPhone using SoCal Jet Boats

« **Reply #16 on:** May 11, 2015, 10:22:12 PM »

Quote from: 93_ultra on May 11, 2015, 09:18:05 PM

well there it is!

That sucks buddy, sorry.

Let me know what you need. Might be able to do it on the cheap.

GY

« **Reply #17 on:** May 11, 2015, 11:10:47 PM »

Wow! What causes that and what can be done to prevent it?

« **Reply #18 on:** May 11, 2015, 11:41:18 PM »

Quote from: el mojado on May 11, 2015, 11:10:47 PM

Wow! What causes that and what can be done to prevent it?

Wallet got too thick. The cash sensor is overly sensitive. Lol

Either a dropped valve caused by a retainer failure, a seized stem/guide, a rod bearing failure, valve train geometry issue, cold water (reversion).

The list is both long and distinguished.

GT

« **Reply #19 on:** May 12, 2015, 01:22:56 AM »

Quote from: GT Jets on May 11, 2015, 11:41:18 PM

Wallet got too thick. The cash sensor is overly sensitive. Lol

Either a dropped valve caused by a retainer failure, a seized stem/guide, a rod bearing failure, valve train geometry issue, cold water (reversion).

The list is both long and distinguished.

GT

Lol. Did you just pull a top gun line? Ya, that is f#cked up. Mine did the same thing..........running fantastic and then it was like you cut the fuel off. Smashed spark plug, f#cked up piston. Super messed up.

« **Reply #20 on:** May 12, 2015, 01:45:21 AM »

Quote from: FordLover on May 12, 2015, 01:22:56 AM

Lol. Did you just pull a top gun line? Ya, that is f#cked up. Mine did the same thing..........running fantastic and then it was like you cut the fuel off. Smashed spark plug, f#cked up piston. Super messed up.

Holy sh!t top gun is on spike channel right now.

« **Reply #21 on:** May 12, 2015, 02:14:07 AM »

Hells ya!

« **Reply #22 on:** May 12, 2015, 02:14:56 AM »

Quote from: FordLover on May 12, 2015, 02:14:07 AM

Hells ya!

« **Reply #23 on:** May 12, 2015, 05:48:01 AM »

Quote from: GT Jets on May 11, 2015, 10:22:12 PM

That sucks buddy, sorry.

Let me know what you need. Might be able to do it on the cheap.

GY

I just need to get it fixed asap or replaced.

« **Reply #24 on:** May 12, 2015, 05:50:35 AM »

Quote from: FordLover on May 12, 2015, 01:22:56 AM

Lol. Did you just pull a top gun line? Ya, that is f#cked up. Mine did the same thing..........running fantastic and then it was like you cut the fuel off. Smashed spark plug, f#cked up piston. Super messed up.

yep. sucks. now it's river season. gotta fix it quicjly!

93_ultra

Rooster454

93_ultra

carrera202

Roadrunner

93_ultra

93_ultra

GT Jets

Flusher

93_ultra

GT Jets

93_ultra

GT Jets

93_ultra

Mrblueeyesnick

lifted250

GT Jets

el mojado

GT Jets

FordLover

FordLover

FordLover

FordLover

93_ultra

93_ultra