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  1. carrera205

    5.7 Vortec Runs Great On Land but Bogs Under Load in Water

    I'm at a loss here. My 5.7 Vortec runs like a top in the driveway on muffs but when i put it in the lake under load it can't get above 1700-2000 rpm without sputtering and trying to die. I can put it on muffs in the driveway and take it up to 3k and it purrs but put it in water and it wants to...
  2. carrera205

    Wiring Fuel Pump Relay to Alternator

    I'm installing an electric fuel pump on a 1991 Mercruiser 5.7. The wiring harness for this boat has almost no keyed power options so I've connected the excite wire to the keyed power on the back of the alternator. Everything seems to function great but I've seen some people say not to do this...
  3. carrera205

    Mystery Oil Mist Coming from 5.7

    Recently installed a new mercruiser 5.7 vortec long block in in my boat. Everything seems to be fine it's running high oil pressure 60-80psi water temp at WOT is roughly 160 and everything seems to be fine but there is evidence that there is a mist of oil happening inside the engine compartment...
  4. carrera205

    How’s This Oil Look - First Drain After Fresh Build

    I finished up my first 5.7 votec build and after doing the break in period and running it around the lake for 20 minutes I took it home and drained the oil to replace it with a fresh batch. The engine sounded great during the run but I’d love any impressions on my oil. It’s super nerve racking...
  5. carrera205

    Electric Choke Kills Spark

    Just finished building a 5.7 vortec. I hooked the red power wire to the switched power on the coil and then grounded the black wire to a grounded bolt. When the engine wouldn’t fire I started checking things out and figured out it wasn’t getting spark until I unplugged the ground wire from the...
  6. carrera205

    Vortec Valve Lash Adjustment Nesscessary on New Long Block?

    I purchased a ATK Vortec long block a while back and while looking through the instal manual it says to do a valve lash adjustment after the running the engine. I was under the impression that if the lifters are hydraulic lifters then doing a second adjustment isn't necessary considering this...
  7. carrera205

    Vortec Long Block Valve Lash Adjustment

    I purchased a ATK Vortec long block a while back and while looking through the instal manual it says to do a valve lash adjustment after the running the engine. I was under the impression that if the lifters are hydraulic lifters then doing a second adjustment isn't necessary. Anyone have some...
  8. carrera205

    Engine Build for Fresh and Salt

    Building a 350 5.7 and want to put it in salt water from time to time but at the end of the day it'll always get trailered and flushed with fresh water. It's a raw water cooled system and I'm wondering what if any additional things I need to build into the motor. The intake I put on there is...
  9. carrera205

    Replacement Crank Pulley Mercruiser 5.7

    Trying to find a replacement for the crank pulley for my 5.7. Despite all of my carful storage it seems to have walked away. I'd love to replace it with a nicer pulley but not sure on the spacing needed since i don't have the original part! Anyone replaced theirs with a newer one?
  10. carrera205

    Swaping Quadrajet with Edelbrock Marine 1409 on New 5.7 Long Block Need Advice

    I'm repowering after a cracked block and dropping my old quadrajet (never ending issues with that carb) in the garbage and replacing it with an Edelbrock 1409 Marine Carb and Edelbrock Intake. I'm wondering if anyone has done this switch and if the throttle brackets bolt up or need adaptors.
  11. carrera205

    Info On Bolt Sizes / Lengths for 1990 5.7 Mercruiser

    Looking for a good resources for bolt sizes for 1990 5/7 mercruiser! A few years back i cracked the block (early freeze in Oregon) on my 5.7 and pulled it. I tried to preserve all of the bolts but after a few house moves it seems quite a few bolts have disappeared. Now that i'm getting a new...
  12. carrera205

    Are These Risers Still Good?

    So these risers are about 27 years old but never been taken in salt and were taken out of a boat with about 400 hours on it. I'd love to reuse them but not sure if they're in good enough shape or not! I was thinking of running a wire brush down in there to clean them up a bit as well. For those...
  13. carrera205

    Looking for a Bolt Kit for 1990 Mercruiser 5.7

    I'm dropping a new long block into my boat and I'm trying to find where i can find a diagram of all the bolt sizes and lengths. After pulling the old engine out two years ago the old bolts for all of the accessories and things got tossed in the trash. I have the Mercruiser Repair Manual from...
  14. carrera205

    Mystery Block ID V0320OOMB

    I pulled the cracked motor out of my boat and I'm trying to figure out this block! The casting number is 16093688 and the engine ID is V0320OOMB. I can't seem to find an id online for this thing.
  15. carrera205

    Current Merc 5.7 Cracked...Suggestions for Engine Replace Steps

    Fired up the Mercruiser Alpha 1 5.7L the end of last summer and got milkshake coming out of the dipstick... dammit there goes the block I think. Now I need to pull the engine and figure out what to do. I'm pretty mechanically proficient and have done two engine rebuilds for autos before (SBC350...
  16. carrera205

    Found oil and water in my 1990 Mercruiser 5.7 Now what?! PICS INC

    So after a carb rebuild I get the motor fired back up and suddenly I notice "milkshake" dripping from the dipstick tube... awesome. So I drain the oil and sure enough i get the milkshake looking oil/water mix. No I'm trying to decide what next. The engnie is a 1990 5.7 Mercruiser S/N D383675...
  17. carrera205

    After rebuild What is the proper way to bring her back to life?

    1990 Mercruiser Alpha 1 Gen 1 5.7 350 Brand new to the forums! I recently went through a boat I just got after it had sat for probably 5-6 years. First time owning my own boat but I'm mechanically inclined so I did all the work myself with the aid of the manual and a ton of research. I did the...
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