Yamaha outboard lower unit noise. Grinding Noise in Lower Unit.

Yamaha outboard lower unit noise If you are mechanical, it would cost you far less money to rebuild the lower unit than to purchase a new one. Outboard Lower Unit Rebuild Cost. Is it backlash Jul 11, 2016 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. If it is in Nuetral i do not hear any noise. I'm kind of thinking it is either a bearing in the lower unit or the thrust bearing on the drive shaft. Aug 26, 2006 · Yamaha apparently changed something from '91 - '92 and later model lower units which requires the later model lower units to take these parts. I first noticed this about the time I switched to a Yamaha black stainless steel prop. your hoping not to find any metal. I have noticed a chattering noise that seems to come from the lower unit when in forward gear at idle speed. While the sound might be originating in your lower unit, the problem might not. If you have a bad outboard lower unit, you have several options. The lower unit drain screw had a good amount of “very fine” metal pierces attached to the magnetic part but not seeing any larger metal pieces. The noise will go away as the RPM is increased since the gear teeth become locked together and don't bounce off of each other. Both cold and warm, the engine was making a ratteling noise at a certing higher rpm, lower or higher rpm resolved the noise. Jul 15, 2008 · I did a search and didn't see this question discussed. i think this is a pretty serious problem. Dealing with lower unit issues on your outboard? In this video from Boats. Jul 16, 2021 · The source of the sound has got to be the drive shaft or lower unit. Motor has been running great, but I took it out today and noticed a loud knocking when moving at idle or just above idle speed. You might be able to find a complete parts motor, I was lucky and picked up a spare outboard with blown block for $200 Jun 11, 2015 · Yesterday he told me Yamaha had provided a new lower unit assy which he replaced with the one on my outboard. Jul 13, 2012 · Re: Yamaha 250 lower unit noisey get boat out of the water,take a sample of lower unit lube 1/4 cup. Jun 22, 2007 · I have a 96' Yamaha 115 2 stroke outboard. Yamaha conluded that the noise is caused by backlash in the gearing and is normal when the outboard is in dry run with the propeller installed. However, this is going to require more of your time than simply making a purchase. When i have it running w/ the garden hose on it and if it is in Foward or Reverse at idle speed i hear chattering in the lower unit. These guys here can direct you to buy a decent remanufactured unit or you can buy a new complete unit from boats. Apr 21, 2014 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. turn the flywheel till the piston is in the full up position closest to you Aug 14, 2019 · I just did an impeller change and the noise did not go away. The slightest increase in rpms stops the noise. May 18, 2009 · Re: Knocking or Hard Rattle In Outboard the first thing that i would think of is that one or more of your pistons is loose from the rod or the rod is bent or out of alignment. use a clean drain pan. F150 lower unit Apr 9, 2015 · This made it worse, so we dropped lower unit again and made sure the lower was in neutral and made sure control and linkage was all in its neutral position. So if anyone runs into a similar problem or replaces a lower unit from a '91 or earlier model 150/175/200 with a new or reman lower unit, be sure to check this. Jul 1, 2023 · Ok so finally got the boat out of the water and was able to drain the lower unit oil. But if I take the prop off, there's no noise. net, John will take you through some common lower unit problems and where you might Jun 20, 2017 · Yamaha 2-stroke 200 HP GETO L 500430 X 61H with enige noise /vibration. The engine still ran and shifted perfectly. May 13, 2013 · rattle at idle/ Wrist pin rattle Rattling at idle? Yamaha had a problem with small end connecting rod wear on pistons at the wrist pins. Grinding Noise in Lower Unit. You can rebuild the unit or purchase a new one. The sound is loudest on the mid-section, but I can't really listen to the actual lower unit that well while it's running in the trash can. Here are some outboard lower unit troubleshooting tips and videos to get you started. post picture of Aug 26, 2010 · I have a 2005 Mercury 50 ELPTO 2 Stroke w/ aluminum prop. Their story is that when run in the water the propeller gets Nov 28, 2015 · Moreover, they are so quiet the noise can be very noticeable. no metal is then it will have to be something else. the best way to check this is to take out all the plugs and to look in to the combustion chamber. if its been a while since you change lower unit ,then just drain whole thing. I ran the engine on the hose and heard the noise again and it was for sure coming from the lower unit, and not the motor. Only way to keep it from happening was to slide the shift linkage back towards reverse some. No damage is occurring. most drain plugs have a magnet on the end if its full of metal you got lower unit problems. Now it's making the same noise at weakboaerd speed . Put it all back together and it still did it. Text book situation is the noise is heard when the low unit is in gear and the motor is at an idle, or maybe just above idle. Attached are some photos best I can get but it seems like the oil is dark but not milky, which is good. . The prop is heavy enough that with no back pressure the dogs rattle against each other at low revs in gear but once it gets to about 1k there's enough spin that the dogs don't have any play and the noise goes away. I am running a '02 Yamaha F115. You try to engage your outboard in either forward or reverse, and you hear some grinding, but the unit does engage. If i give it throttle you do not hear it. Take out the spark plugs , rotate to top dead center by using a pencil in the spark plug hole then turn the fly wheel and see if the piston starts to receed, If it feels like it is taking rotation to start down a piston has wallowed out. So many failures. But the noise was still there. net for around $3000. Lower Unit Noise? 07 Ouch! I know that rebuilding the lower gearcase is NOT the way to go. bzs smmw huou tzqfhf kkcu hvpkxpk oqmgj uqkk krwtgi hrj ezrsuvy nfwrm mulfeh wpbbmng ctyji