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#525094 - 12/03/11 07:17 PM Mercruiser 7.4L Rebuild - All Done . . . .  
Joined: Aug 2005
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tpenfield Offline
Admiral
tpenfield  Offline
Admiral

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Cape Cod, MA
I finished things up with the engine today, so here is a picture (or 2) of the engine in its final form. cool





My next steps are to get the engine primed with oil and set things up to do some bench testing and various adjustments. Then I may as well put it back in the boat, so I can have the garage back for winter. thumb


Regards, Ted

Formula 330SS

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#525097 - 12/03/11 10:33 PM Re: Mercruiser 7.4L Rebuild - All Done . . . . [Re: tpenfield]  
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GoFirstClass Offline
Retired Boating Bum
GoFirstClass  Offline
Retired Boating Bum
Grand Poobah

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Pasco, WA
Nicely done. That looks like a brand spankin' new engine. I bet you're anxious to fire it for the first time!


"Beachcomber" 1995 Sea Ray 550 Sedan Bridge


Anchor's down......Bottoms Up!
#525106 - 12/03/11 11:27 PM Re: Mercruiser 7.4L Rebuild - All Done . . . . [Re: tpenfield]  
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kdl Offline
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kdl  Offline
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Central Mass
thumb


2005 Cobalt 246 8.1 Gi
"Paradise..."

2001 Key Largo 190 CC
"After Five"
#525108 - 12/04/11 10:04 AM Re: Mercruiser 7.4L Rebuild - All Done . . . . [Re: tpenfield]  
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Lou C Offline
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Lou C  Offline
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Long Island NY
great job!!!


88 Four Winns 200 Horizon 4.3 OMC
98 Jeep Grand Cherokee 4.0 Six Selectrac
07 Jeep Grand Cherokee 5.7 HEMI Quadradrive II
#525122 - 12/04/11 06:55 PM Re: Mercruiser 7.4L Rebuild - All Done . . . . [Re: tpenfield]  
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Dave R Offline
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Dave R  Offline
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Raymond NH
Nice work, I'm sure it'll run perfectly.


"Mischief Managed"
2000 Regal 2550 LSC
7.4 MPI Bravo 3
#525125 - 12/04/11 07:39 PM Mercruiser 7.4L - Startup Video [Re: tpenfield]  
Joined: Aug 2005
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tpenfield Offline
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tpenfield  Offline
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Cape Cod, MA
A good day in getting the engine set up on some dollies and hooking it up for a test run.

Here is a video of starting it up on my web page . . .

Test Run of Mercruiser 7.4L

I also uploaded it to YouTube . . .


Last edited by tpenfield; 12/04/11 07:56 PM.

Regards, Ted

Formula 330SS

My Boat Web Sites
#525126 - 12/04/11 07:45 PM Re: Mercruiser 7.4L - Startup Video [Re: tpenfield]  
Joined: Jan 2003
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Lou C Offline
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Lou C  Offline
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Long Island NY
Loved watching it Ted, great job, I especially liked the dual dollies to move the engine around...sounds like its running really smoothly....


88 Four Winns 200 Horizon 4.3 OMC
98 Jeep Grand Cherokee 4.0 Six Selectrac
07 Jeep Grand Cherokee 5.7 HEMI Quadradrive II
#525128 - 12/04/11 09:24 PM Re: Mercruiser 7.4L - Startup Video [Re: tpenfield]  
Joined: Mar 2004
Posts: 4,199
Puddle Pirate 2 Offline
LTJG USCGR
Puddle Pirate 2  Offline
LTJG USCGR
Admiral

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Eastern PA
WOW...that fired right up. Nice job! So, my takeaway was that your problem was probably mostly attributable to the rust scale and to a lesser extent, the valves being a little goofy. Sound about right?


pirate
#525130 - 12/04/11 09:30 PM Re: Mercruiser 7.4L - Startup Video [Re: Puddle Pirate 2]  
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tpenfield Offline
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tpenfield  Offline
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Cape Cod, MA
Originally Posted By: Puddle Pirate 2
WOW...that fired right up. Nice job! So, my takeaway was that your problem was probably mostly attributable to the rust scale and to a lesser extent, the valves being a little goofy. Sound about right?


Yes, I think that the rust sediment in the block was causing the engine to run hot, and the valve leakage was losing power. We shall see how it performs once in the boat and on the water.


Regards, Ted

Formula 330SS

My Boat Web Sites
#525132 - 12/04/11 10:19 PM Re: Mercruiser 7.4L - Startup Video [Re: tpenfield]  
Joined: Apr 2006
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kdl Offline
Admiral
kdl  Offline
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Central Mass
Originally Posted By: tpenfield

We shall see how it performs once in the boat and on the water.



Well, what are we waiting for??? You've got five days before the temperature really drops off. wink

Does sound good running.


2005 Cobalt 246 8.1 Gi
"Paradise..."

2001 Key Largo 190 CC
"After Five"
#525135 - 12/05/11 12:24 AM Re: Mercruiser 7.4L - Startup Video [Re: kdl]  
Joined: Jun 2010
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CharlesS Offline
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CharlesS  Offline
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Bryson City, NC. 28713
Wow Ted, you have done a first class job!

Love to read the stats and look at the pics when you run the boat for the first time.


#525141 - 12/05/11 08:30 AM Re: Mercruiser 7.4L - Startup Video [Re: tpenfield]  
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BToran Offline
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BToran  Offline
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Northport, New York
sweet.


Bruce Toran
Former Owner of a 1996 Carver 320 Voyager
-----------------------------------------
"Don't Eat Anything Bigger Than Your Head"
#525147 - 12/05/11 11:16 AM Re: Mercruiser 7.4L - Startup Video [Re: tpenfield]  
Joined: Jul 2003
Posts: 6,466
Dave R Offline
Admiral
Dave R  Offline
Admiral

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Raymond NH
Sounds great! I love starting a motor up after it's been all apart and I put it back together. It's so rewarding, even if it's a lawnmower engine, more so if it's a big V8 though.

My last enginbe tear-down was earlier this year when I replaced a head gasket and cylinder base gasket on my 2001 Kawasaki ZX9R. I have to confess that after it was together, I turned the key on, stabbed the starter button, and the motor did nothing. I double checked my wiring harness connections, checked fuses, and basically wasted an hour troubleshooting. Only then did I notice it was in gear... I put it in neutral and it fired right up. Doh!

The only good thing that came out of this was that I discovered my fuel pump was getting very loud (a sign of imminent failure). It only runs after the starter button has been pressed, so I never heard it running over the noise of the engine before. I replaced it with a low-mile used one and carry the old one as a spare. They are very easy to change and will strand you if they fail.


"Mischief Managed"
2000 Regal 2550 LSC
7.4 MPI Bravo 3
#525267 - 12/08/11 01:06 AM Re: Mercruiser 7.4L - Startup Video [Re: tpenfield]  
Joined: Feb 2006
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Justified Too Offline
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Justified Too  Offline
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Colorado
LOVE that sound! smile



'Justified Too' - 2003 Chaparral 220 SSI 350 MAG/MPI BIII
#525459 - 12/13/11 01:29 PM Re: Mercruiser 7.4L - Startup Video [Re: tpenfield]  
Joined: Mar 2006
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DaleG Offline
Admiral
DaleG  Offline
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West Palm Beach FL
Nice rebuild --- I really liked removing my 5.7L and similar rebuild work last winter --- I need to start thinking about the electrical rewiring project for this winter.


thanks
Dale Gange - West Palm Beach
Wow - its been 40 plus years since I was an Ensign -USNA 1970

2003 Four Winns 240 Horizon
5.7Gi DP -- 280 HP

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