Boat Engine Repair

5.7 liter vortex Mercruiser engine

You should be able to get the information you need from anyone that rebuilds engines.

2008-11-15 15:23:13 by Sunset Sally

just showing you what to do if your engine want fire.

I'm starting up a new business in marine engine service and repair, which is basically boat, yachts... eventually I will start doing cleaning washing service and all detailing issues, I am a marine mechanic certified.
I would be very grateful if you could come up with a good names or ideas???
Thank you

Bilge to Bridge Marine Service
Bow to Stern Marine Service

2010-04-13 17:40:52 by KBzon

Price: $9.29 $5.75

This item is not for sale in Catalina Island
No disassembly required
Target any low pressure leak in hoses, oil pans, differentials, transmission pans and much more

i have a 1992 48 horsepower evenrude and i just found an oil leak coming from the gearcase. i looked for where the leak was coming from, hoping my moter doesn't have a crack and it was coming from the bottom of the prop. i don't have much money and i really like going out on my boat so i can't really afford to buy a whole new moter. how should i fix it. I think its burnt oil from the power head making exhaust residue because it is a dark black. if this is true would i need to fix it and if i do then how?

relax, unburned engine oil dripping from the exhaust is not uncommon. It has that dirty dark appearance because of all the carbon build-up in the cylinders, ports, exhaust tube, etc.

Easy enough to find out if it's gear oil -- just drain the gearcase; if the oil has a streaky or milky appearance, it's got water in it. Post another question on how to pinpoint the source and fix it.

Assuming it's engine oil, here's what to do:
First, if your spark plugs aren't Champion QL78C gapped at .030, change 'em. I have nothing against other brands, but your engine was built around that plug and that plug is what will make it happy.

If you do a lot of trolling, then widen the gap to .040, and make sure you finish the day with a nice long run at WOT. These motors are bulletproof, but they're tuned to run flat out, and need to do so in order to keep carbon from building up in the cylinders.

Add a decarb additive to your gasoline. I always add an ounce of Seafoam per gallon. Mercury, Yamaha and OMC all make good stuff too, but they sell Seafoam at my local car parts store, and it's great stuff.

You need to be making 5000 to 5500 RPM at WOT with a normal load in the boat. Any less than that is lugging the motor at all throttle settings, and lugging promotes coking. Dropping down an inch in prop pitch will add about 200 RPM.

Clean the carbon out of your motor. The manual says to pull the cylinder head and manually clean the cylinders. But here's a better way:
You'll need a couple cans of a a spray decarb solvent product, such as SeaFoam Deep Creep, OMC Engine Tuner, Mercury Power Tune, or Yamaha Ring Free. I use Deep Creep.

Run engine at fast idle, with engine running and warm, slowly spray liberal amount into each carb. Its gonna smoke up the place. Spray for a couple minutes, now spray a larger amount into the carb(s) until engine chokes out and stops.

Remove spark plugs and spray the decarb product liberally into each cylinder, install the spark plugs, let it soak for an hour or more.

Spin the engine with spark plugs out to blow out all the crap that's in there, then start the engine and run at medium throttle, or if at the lake, run it at full throttle. It won't hurt to spray some more through the carbs. Run it for at least 10 minutes to flush the crud out of your engine.

Now remove and clean, or replace the spark plugs. It works well to do the spraying, the night before you go to the lake.

This way you can let it soak overnight, and run at full throttle at the lake.

Don't do this in front of the garage door or the house, unless you want it covered with greasy black crud.

2009-05-19 19:16:48 by me

Price: $49.95

Hi please give me a ring on 607317128

no number, you e-mail me and we can work it out

2009-05-13 13:37:50 by sunlover

It's a 260 mercruiser and it apprarently was winterized too late in the season so we have some problems. I'm wondering what actually takes place when it is "froze and broke" as the marina explains. This is a new engine just replaced two years ago so I'm beside myself right now.

$3500 to $5000 at a marina.

Shop this around, and not just on price, but on quality. Make sure they offer a warranty going forward, and a long one. I had a nightmare experience on a rebuild, the second guy who rebuilt said "I have never seen a worse engine rebuild in my career. And, I have been doing this 20 years." He was a performance builder by trade and fixed my engine for 1/3 what the marina wanted. He offered me a lifetime warranty on the work he did. Can you believe that?!?!?

BTW: true story.

2008-05-22 02:57:32 by bigboatguy