9. Sierra 18-1931-1 Exhaust Manifold Replaces 835804. V-Drives Flappers are a one way valve in the exhaust manifods. Fuel Filtration . Include dashes and spaces if your part number has them. . This includes a pair (2 Flappers). I don't think the manufacturer would of designed them if they were not needed!http://amzn.to/2sSrvCQ . Performance. The exhaust leak is a more likely source. Perform expert tune-up's. Troubleshoot and Diagnose all on your own. Another manifold setup that Mercruiser came out with are . 5) Structural Issues To Pay Attention To. You may have to tap it with a soft board to knock it loose. Add to Cart. Aug 31, 2004. Flushed hoses as best I could. Restricted exhaust system (broken exhaust shutters/flappers) in engine transom shield or drive- Shutters are in tact and working properly. Twin chevy 350's inboard . They can travel back-ward until they 'wet' the vertical exhaust passage. farming simulator 22 vehicles list Centek 1642090 Carver 5103403 and 5103404 Exhaust Tee 4 x 4 x 5 no internal flapper. Every CAPRISTO exhaust is made from T309 stainless steel and designed for extreme temperature applications (>600C), employing mandrel-bent tubing, and hand-welded construction with the utmost care and professionalism. Many times the engine failure is due to an external failure and the person swapping motors takes all external parts off old motor and puts them on the new one. 8. Exhaust back pressure measurements are a very low number, something like what it takes to blow up a balloon. Hi. Mercruiser should be on the hook no matter what on all of these over stressed condition engine failures. This exhaust configuration is commonly referred to as a splitter. If there is no voltage drop, check the blue knock sensor wire for a break. The flappers prevent water from going into the. Check Engine Light comes on. If the exhaust manifold cracks or leaks, it can cause an exhaust leak that can negatively affect engine performance. Re: Mercruiser exhaust flappers. Turbocharger Exhaust Gaskets; Marine 316L SS 4 inch Pipe (4.5" OD) 90 Degree Elbow; Marine 316L Stainless Steel 4 inch Exhaust Pipe (4.5 OD) SMX Custom Dry Exhaust Elbow Kit; SMX Custom Stainless Steel Exhaust Mixer Kit; QSM 11 Turbo Exhaust Shield / Wrap; 90 Degree Exhaust Elbow Wrap (Long Radius) Fuel Systems & Filters. I tried all day to get the water out of the cylinders, used WD-40 and cranked it a bunch. The different components in a kit are already engineered to fit together with precision. The shutters can start making a "clakity" noise. Hard starting and an unfamiliar knocking sound on starting are two signs of a leak, but by then the damage is usually done. They are designed to pull a heavy load, then cool, not to pull heavy load after heavy load. Change your fuel and oil filters yourself. Use a screw driver or 5/16" socket and loosen all the hose and bellows clamps. Pocket the screws and lock washers for reassembly. Apparently they can also fail causing an annoying rattle and also in rust areas they can get stuck shut. If the riser fails to accomplish either of those jobs successfully, the end result is the arrival of Uncle Big Bill on the scene. Pair of Shutter Water Flapper Exhaust Y Pipe for Mercruiser BPI89170 replaces 807166A3 Pair (2 Flappers) of Exhaust Water Shutter Flapper for 4 Inch Y pipe used on Mercruiser. Today we took apart the exhaust riser to inspect them before the Boating season of any rust. Exhaust hose or tubing is used to connect the exhaust manifold to the muffler and runs from the muffler overboard. Further, wouldn't either both flappers need to be bad, or both exhaust manifolds need to be bad in order to get water in cylinders on both sides of the engine? Mercruiser Exhaust Y pipe with Flapper 861229-C is in good shape no corrosion but one of the flapper is bad. Hello! However any of these causes are rare compared to Exhaust Manifold Failure. Sent from my LG-H812 using Lake Ontario United mobile app chinook35 223 1k Location Watertown NY Called an adaptive valve, it's a spring loaded weighted flapper who's job is to attenuate exhaust noise to eliminate the annoying low frequencies. Water Intrusion. Exhausts last forever here so I'd have to intentionally eliminate it. Please fill us in. Iron castings, such as exhaust manifolds and risers, fail from corrosion as they cool and contract. Exhaust pressure is higher that's why it's easier to hear an exhaust leak under load. It is essential to use material which can withstand heat, oil, acids, pressure, water weight and vibration without failure. Those are the usual suspects. The exhaust riser has two functions: (1) to keep water from backing up into the engine through the exhaust piping and, (2) it serves as the device that introduces cooling water into the exhaust exit piping system. If you own a late model Mercruiser engine in your boat, you're almost guaranteed to run into one of these common problems. On the test run, here are some of the symptoms that may or may not be related: I get 2 beeps every 1-2 minutes mostly at speeds above idle. However I have seen a lot of comments from folks that argue that you really don't need them. Exhaust flappers. Member Posts: 157 . As the rpm's increase, more exhaust is forced through the prop, allowing optimum flow and . I'm needing to replace the flappers in my exhaust I have captains call exhaust and I cannot find any information anywhere that tells me where these flappers should be located. Mercruiser 1.7dti 120hp / Wastegate valve problem symptoms. Many a boat that runs well has been put in its slip on Saturday afternoon only to have water siphon from corrosion-damaged castings into the cylinders overnight. This let the flapper go past the stop and let cold water in hit and fracture a valve. They are the typical inboard outboard MerCruiser risers on a PC. Eliminate on-water failures and tow-in's. Mercruiser Sterndrive Information. If you still see gas coming into the carb, you have your culprit. Tony Athens : 3 - 21-Jul-13 . PartsVu.com stocks everything needed for Yamaha Marine outboard engine boat exhaust systems, including exhaust elbows and tubing, thru-hulls, flapper valves, and marine mufflers. The quick and quiet contains no electronics (or moving parts) and therefore the exhaust sound cannot be controlled. Upon Sunday's start-up, incompressible water does irreparable engine damage. Excessively noisy engine. Remove the shift bracket from the elbow and any modules or mounting brackets. Step 1 Loosen the small bellows clamp that secures the exhaust bellows to the manifold, using a standard slotted screwdriver. Volvo did away with exhaust flappers in 99. I ngestion - This issue is most commonly caused by incorrect Exhaust Riser Height. Water was flat, no wierd sudden stop (like getting water back through the flappers). (65%) probability of failure and @8 years they estimate a (90%) probability of failure. I motored back to marina at 2.5 miles per hour watching the temp . We are UK Distributors for Osco and GLM replacement Manifolds and risers. This may happen because, of a clogged exhaust pipe; catalytic converter or muffler. 53.7K subscribers In this video I explain what flappers do. No clunks, just like the key was turned off. Hot exhaust can burn you to the bone and props can slice you up. Need help finding the right replacement parts for your Yamaha outboard motor? Step 2 Remove the three Torx screws from the tabs at the bottom of the upper exhaust pipe assembly, using a Torx driver. Rough Idle. I recently performed the following maintenence: New exhaust bellows, driveshaft bellows, shift bellows, water hose, and impeller. Typical maximum limits are from 1.5 Hg to 3 Hg or 20 to 40 of water (right around 1 PSI), depending upon the manufacturer. Ps you don't say what engine or year or boat that it's in. Engine performance issues are another symptom that can be caused by a problematic exhaust manifold. If still missing do a compression check it might reveal a problem. In this case your marine engine may need to have exhaust spacers installed. #1--backwash through exhaust--make sure it isn't clogged up #2--Water seeping past rings from flooding combustion chamber caused by: a: Backwash from exhaust b: loose head bolts c: Blown head gasket d:crack inside exhaust manifold e: cracked block f: improper engine or exhaust hose install g; cracked cylinder wall Prevent costly repairs. If the riser fails to accomplish either of those jobs successfully, the end result is the arrival of Uncle Big Bill on the scene. Ran for about 30 minuites and just cut out. This is when sufficient water has leaked into the cylinder that piston compression becomes impossible. Misfires. If it's all working, you should see a voltage drop on the dvom. Mercruiser 3.0L Tune-Up Kit - M30LXDELCOEST The store will not work correctly in the case when cookies are disabled. Based on our more than 25 Years as engineers for Mercury Marine within the Mercruiser Products Division we have years of direct hands on experience regarding both Mercruiser Engines and Mercruiser Sterndrives. No barnacles or mussels growing in there? Mercruiser says you should. - Answered by a verified Marine Mechanic . Messages. Usually when you have a bad water pump impellar the engine will overheat at both low speed and high speed. $49.95 BPI89175 Shutter Water Exhaust Flapper for Mercruiser 4 Inch Y Pipe V6 V8 807166A1 Exhaust Back Pressure. The service manual doesn't show the captains . 4) Bayliner Boats Most Affected With Problems. The exhaust riser/shower head as pointed out is a possible restriction point and may need to be checked. I know they are there to keep water from going up too far into the exhaust. One of the first symptoms of a problem with an exhaust manifold gasket is an excessively noisy engine. 3) Issues With Bayliner Boats. If the circuit is good, then the knock sensor is bad. Unbolt the riser from the manifold. January 2017 in General Boating Discussions. Oh and replace the riser so it works properly. Add to Cart. WE ARE IN NO WAY AFFILIATED OR SPO. It bolts directly to the bottom of the transom shield. I have a 93 4.3 and have a similar noise that turned out to be the flapper in the exhaust manifold that prevents water from backwashing into the manifold . High back pressure is a common exhaust system problem. I have two problems: Problem 1. Volvo said you should not put them back in if they fall out. 1989 Avanti 3450 Sunbridge twin 454's MV Mar-Y-Sol 1979 Bayliner Conquest 3150 hardtop ocean express. . When installing or designing exhaust systems, follow all federal, state, and local boating and safety standards for the market in which the boat will be sold. May 2, 2007. Oh, 3200 RPM trimmed out. External coolant leaks. #8. If the engine runs well chances are the injectors are ok. PPT Direct Replacement Mercruiser Parts Options. If you Need advice or are unsure about your symptoms call us now on. You can never be too careful. Do you really need the shutters on an IO boat engine? Reduce damaging corrosion. Here is a more detailed list of the most common symptoms of a bad or cracked intake manifold: Exhaust system design and installation can affect: Noise level. Other problems in a R.W. When shutters get old they can make noise. Here are the main problems people have experienced with Bayliner boats: 1) Generator Issues On Older Models. Other common causes for water ingestion are poor exhaust manifold/riser joint design. All marine inboard engines have exhaust risers. Enter your MerCruiser engine or stern drive part number in the Search by Part Number field at the top of the page for an online inventory of matching MerCruiser engine or stern drive parts. Pull the bellows from the manifold. Mercruiser Exhaust Y pipe with Flapper 861229-C. $140.00. Find MerCruiser Manuals from 1964 to 2014. Boat Level. 1-800-486-0999 0 CORSA Performance Marine Leader of Engineered Marine Exhaust and Accessories for over 30 Years Marine Exhaust Marine OEM Services CORSA PERFORMANCE MARINE For over 30 Years, CORSA has been servicing the Boating Industry. failure in Oil cooler (if fitted) Excess bilge water creeping past the sump gasket or oil seals. A faulty exhaust manifold gasket will produce an exhaust leak that will sound like a hissing or tapping sound coming from the engine. 4 : MerCruiser Diesel: Water intrusion: Gordon 88 : 6 - 22-Jan-13 Reply: Gordon 88 : 26-Nov-12 : John, It sounds like the overheat has either cracked the exhaust manifold, head, or the head gasket or an important seal has failed causing the coolant to find its way into the sump, via the cylinders probably. Has anyone removed their flappers? Loss in Engine Performance. Typically each automotive manufacturer will . This kills the new motor. Under certain conditions, a fine mist or droplets of water can be drawn backward into the exhaust passage of the exhaust elbow while the engine is idling. Since the wastegate hose is designed to relieve pressure inside the turbocharger manifold, it is constantly monitored by the vehicle's ECU (engine control unit). Poor cylinder compression Compression Test- Rebuild heads last year on both motors, problem persisted 10. . $414.99 If it is not right the float will continue to put fuel in the bowl and flood the motor, thus the hard starts. If you ignore the situation, hydrolock may occur. This is a chronic problem on our boat, and I have fixed this in the past by replacing the fuel filter and cup and the lower fuel pressure regulator. pump can be caused by a worn cam (bends the impeller vanes) and worn housing cover and back plates. To check this, reconnect the knock sensor and lightly tap on the block next to the knock sensor with a small hammer. 01872 863777. When the water jacket of a manifold or riser becomes clogged with scale and corrosion, a leak is usually close behind because the internal walls are deteriorating. Lots of impellers can look ok but not be. Installing the exhaust system incorrectly can lead to serious injury or death. . 62,334. Takes a lot more gas, pressures & temps are higher. The shutters help prevent water from running back into the engine under certain circumstances. dwolf Norfork lake,Gamilia Ar. Flapper on port side was badly burned, and flapper on starboard side was missing (as was pin and bushings). Fits into the "Y" Pipe on. So water pump, thermostat, oil cooler, exhaust manifold, risers, intake manifold should all be inspected and most likely replaced. PPT prides ourselves on providing our customers with more than products. Sometimes overheating symptoms can vary. An exhaust leak can cause the vehicle to experience a reduction in power, acceleration, and even fuel efficiency. It's likely you killed the starter just by trying to repeatedly start it and you should know if this was the case. It is very important that they work properly. The sound may be especially pronounced during a cold start or during acceleration. Mercury - Mercruiser 27-99757 Exhaust Manifold Gasket Fits GM V-6 engines Replaces: GLM 32170 Mallory 9-61421 OMC 3853412 Sierra 18-2909 Volvo 3853412 Genuine OEM Mercury-Mercruiser part. Captains call exhaust. One spark near a battery can cause an explosion. Exhaust Water Shutters The Exhaust Water Shutters are located in the exhaust y-pipe. MerCruiser Diesel: Harmonic balancer: al : 2 - 23-Jul-04 Reply: al : 23-Jul-04 : I have a 93 4.3 and have a similar noise that turned out to be the flapper in the exhaust manifold that prevents water from backwashing into the manifold, it bugs me but not enough to fix it. 2) Bayliner 2004 Model Bowrider. 7.4-454-502 Y pipe parts that come with exhaust flappers to complete the setup. Remove any hoses which are attached to the manifolds and/or risers. At lower rpm's most of the exhaust is heard through the exhaust tips. Keep your Mercruiser 3.0L inboard engine in top shape with this comprehensive tune-up kit for Merc engines with Delco EST electronic distributors. Here are some common symptoms and warning signs that may hint towards having a worn out wastegate hose: 1. If they don't function, water can rush into your cylinders and cause a hydro-lock which can cause total engine failure in some cases. A new fuel filter and cup did not correct the problem. Also replaced upper and lower exhaust bellows. I was . Sold Out. Look at This drawing and look at part 21. Carburetor defective, or wrong type.--- N/A 11. The exhaust manifold cracked on my Mercruiser 2001 350. This item: For 1998 and newer Water Shutter Replaces Mercruiser 807166A1 Pair (Set of 2) $33.00 Get it as soon as Saturday, Jul 2 FREE Shipping on orders over $25 shipped by Amazon Quicksilver 86166Q1 Bellows Adhesive - Resistant to Oil, Grease, Gasoline and Water - 1.5 oz Tube $15.07 FREE Shipping 3. Mercruiser Engine Information. Nautique Boat 4' Exhaust Flap - 9893. Now they can do many cycles on a hard to start engine, but after a while, they get hot and crap the bed. Is the leg water passage clear? Consequently, a clogged converter, is the most common cause of exhaust back pressure buildup. Apparently it needs to be able to run much higher rpm to keep the stress level down. My friend's Mercruiser has had the gaskets fail twice in 175hrs The pressure is usually measured in units of Water Column Height or Mercury (Hg). Mercruiser's still have them. After the motor is warme up, pull the flame arrestor and turn off the motor. The main symptoms of a bad or cracked intake manifold include: Check Engine Light. Crankshaft failure - Cummins Mercruiser Diesel - 4.2l 300hp -only 360h. I hate to be the one to rain on your parade guys, but the exhaust shutters on the 78's were in the bottom of the exhaust Y, under the engine. I have a 2002 5.0 carb seawater cooled Mercruiser with Brovo 2. I've removed the boat's port-side exhaust manifold, as well. 1. let exhaust exit, keep water from coming in. Ski in NC : 18 : 8 : . As a rule of thumb, hose runs that are longer than four times the inside diameter of the hose should use . It will restrict engine airflow, causing the engine to run hotter and lose power. The engine seemed to perform fine, with the exception of slightly elevated fuel burn (17 gph vs 13.5 gph on plane). Check out our Yamaha Outboard Maintenance Parts Charts to locate your exact outboard part by outboard model. Mercruiser 7.4-454-502 exhaust kits contain risers, manifolds, gaskets, studs, and spacers to efficiently and cost-effectively rebuild your entire exhaust system. Remove the battery from the boat before working . Mercruiser exhaust shutters. Risers do the exact same thing they introduce cooling water into the exhaust exit piping system. I have a 2003 Mercruiser 4.3 MPI alpha one Gen II. Engine cooling water mixes with the exhaust at the end of the exhaust elbow to go over-board. The exhaust riser has two functions: (1)to keep water from backing up into the engine through the exhaust piping and, (2) it serves as the device that introduces cooling water into the exhaust exit piping system. Couple the over propped situation as recommended by mercruiser, a sticky waste gate and a known weaker piston on earlier models and its a recipe for failure. If your engine is difficult to start, produces white smoke, or runs roughly, water in the cylinders may be the culprit. Engine Overheating. Mercruiser Engine Maintenance and Repair. Their job is to cool the escaping exhaust gases that the engine makes before it goes overboard.