Hi everyone, When running a boat at high speeds >3000 RPM and going to idle RPM (in gear) i hear some strange (knocking) noise. The first possibility is that the impellor housing had corroded or cracked. Lower Unit Noise? If I power off the engine and then on sound at idle is completely clean no matter in netutral or not. Any insight as to what is making this noise and how to stop it or just live with it. The Trim unit works OK when boat out of water and stationary in water (leg travels full length of clean piston rams) but when underway, the pump/motor makes a hammering noise when lowering leg – this noise does not occur when lifting the leg. Hi everyone, When running a boat at high speeds >3000 RPM and going to idle RPM (in gear) i hear some strange (knocking) noise. What Does This Mean? Rock-solid for the years he owned the thing. Will need a 1 & 1/16" deep socket, required sized ratchet, a piece of 2x4, and a flat screwdriver or pair of pliers to lift up the tab washer ears. If you are insured, it should be covered if you had lower lube in the outdrive. We stock remanufactured and new gearcases for Mercury and Mariner 60 to 275 horsepower, 1979 to 2011. I drained the lower unit oil and put in fresh and didnt see any abnormalties. To check for this, you can remove the housing cover on the engine and try to wiggle the piston in place. These seals would have a tendency to leak. It's much louder in person than in the vid. Re: Lower unit noise/Play in prop shaft The shaft is supported in a needle bearing. At approx 1500-2000 RPM sound disapears. I have renewed the ATF Dexron oil and purged the system several times, but the noise is still there. I'm at the mercy of what the mechanic found and boat is three hours away. An outboard motor noise often comes from the housing of the engine. Any ideas? When putting in neutral sound disappears also. By any chance did you see any oil on the foot of the lower unit? I helped my brother change the water pump and stat in his new to him C60 used Yamaha. NOTE: Mercury uses 2 different styles of aft adaptors and corresponding locking tab washer. I'm going to have my local guru evaluate the old one and we might try a re-build. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. There is one more thing that could cause a knocking noise, and that is if the pistons are loose or don’t sit in there snuggly. Before anyone could figure out what was causing it, the owner loaded up his boat and left. Back in the 1930s, a man and some friends got together in a barn to make outboards. A boat mechanic said that the knock I heard was in the lower gear unit. He said it needed to be replaced, along with A boat mechanic said that the knock I heard was in the lower… 2001 mercury saltwater series running hot. Looks like I'm getting a "new" unit from [Outboard Recycle Part & Marine, Inc.] Red Rhino for slightly less than $2000.00. At approx 1500-2000 RPM sound disapears. Not overly loud. Keep us posted Jeff, befor you go into your lower unit listen with a short length of garden hose in alot of diffrent places to pin point the sound in the power head. if on the trailer just pull the plugs to drain the lower unit oil sound travels up the driveshaft and often sounds like engine when it's the lower by checking the oil you'll find out if it's in the lower most of the time and frosty is right if you've just change a prop it may cause noise if not installed propperly In autos this technique is so accurate you can listen for a valve out of 10 valves under the valve cover and pinpoint which valve is bad, thats how accurate just a simple hose is. Fortunately, various solutions can help you reduce the knocking noise. Once you start increasing throttle, it disappears as the rpm gets up this high. Noise is heard only at idle RPM. When I spin the prop by hand, it makes a ratcheting sound. C60 TLRY lower unit making some clicking noise in neutral while idleing 04-10-2015, 09:25 AM. The last few times out my 40 hp Mercury outboard (2-stroke, 2004 model year) has made sort of a squealing or screeching noise at idle or low speed. Topic: Mercury Lower Unit Noise/Gear Lash: BW23: posted 10-16-2003 03:55 PM ET (US) Based on one mechanic's opinion, it looks like I need a new lower unit [for my 1997 Mercury 225-HP EFI]. Mine was doing it a little more than expected so I lowered the idle speed and it fixed it. Not overly loud. One idea is to find a blown power head and use the lower unit from another motor. I just rode on my buddies boat and its silent (but also brand new). But sort of a noticeable squeaking.
1mm Cat Engine,
Tabuk Pharmaceuticals Product List,
El Dorado Inmate Search,
Jasper Reports Documentation,
Philodendron Golden Dragon Australia,
Premarital Course Certificate Texas Online,