My boats vibrates

hotshot1 · 03-26-2007, 11:12 PM

Started my Yanmars 315 , they seem to be running very rough at idle. The boat really vibrates seems to be starboard engine, I increase the rpms and it all settles out and runs quiet. Is this just a tune up changing the plugs or should I be more concerned. Oil was changed at the end of January , It was already running a little rough towards the end of the year. Any suggestions would be appreciated

Avenger · 03-27-2007, 10:35 AM

Hotshot1,

Excuse me if this is a stupid question, but aren't Yanmars diesels? What plugs are you talking about? How many RPM do you have to pick up to get it to smooth out? Any smoke? If so what color? Does this happen hot, cold or all the time? How many cylinders on a 315? I'm assuming six, but I don't know Yanmars by model #. We need lots more information to do remote diagnosis.

Capt.Mick · 03-27-2007, 12:45 PM

Your right more information is need before a good guess can be made. Does it vibrate in gear or out of gear?

Quote:

Originally Posted by Avenger H-36C

Hotshot1,

Excuse me if this is a stupid question, but aren't Yanmars diesels? What plugs are you talking about? How many RPM do you have to pick up to get it to smooth out? Any smoke? If so what color? Does this happen hot, cold or all the time? How many cylinders on a 315? I'm assuming six, but I don't know Yanmars by model #. We need lots more information to do remote diagnosis.

hotshot1 · 03-27-2007, 01:38 PM

they are six cylinders, It does smoke but doesn't seem excessive, they do vibrate in and out of gear , The vibration starts to settle down around 800 and is gone by 1100 rpms, sorry about the plug reference it was late and I wasn't thinking. I'm not the most handy around boats , I generally rely on other people to fix stuff for me, You need your dog or cat put back together I can do that very well. I ran it for about 1/2 hour today and did quiet down a little by the end only the transom door was vibrating and the head door. still a little smoke. The guy at the marina said a little vibration was normal and as long as it settles out it's ok. I don't know if he is correct and I am a little concerned.

Avenger · 03-27-2007, 01:55 PM

I'm not particularly familiar with your engines, so I can't tell you how much vibration is normal. But I gather from your reply that this is a new condition. How long have you had these engines, and how many hours are on them? It may be time to get the injectors checked. Again, can you identify the color of the smoke? Blue or white is probably what you're seeing, and it can be difficult to tell them apart. If it's white smoke it's unburned fuel and will cause a burning sensation if it gets in your eyes (note: I don't recommend getting a facefull of exhaust) Blue smoke is engine lube oil and some smoke may be normal when the engines are cold. White smoke would also be an indication that injector service might be in order. Start simple and cheap and work your way up. I don't think I've ever been on a diesel boat that didn't have some buzz or vibration somewhere, so don't panic yet. Hope this helps.

hotshot1 · 03-27-2007, 07:22 PM

I would classify it as blue, I also get a little slick around the outflow, This has been the same since I got the boat in JULY, The engines have 140 hours.

Avenger thank you for your help

homewrecker · 03-27-2007, 09:33 PM

hotshot the smoke at start up is normal for these engines unless you have block heaters on them.When they reach normal temps. they will usually clear up it is just the nature of high speed diesels.Change out all your filters and clean your air element then see what happens.GOOD LUCK

blackwell50 · 03-27-2007, 09:39 PM

You need to change your fuel filters,make sure they are not running cold as that could cause slicking.Also it may need valve lash adjustment if it has not been done at the 1st big service after break in.Yanmars are very fuel sensative.

Free Spirit · 03-27-2007, 10:03 PM

YUP, SOUNDS LIKE THE VALVE ADJUSTMENT IS THE TICKET!

hotshot1 · 03-28-2007, 12:29 AM

Thanks all I will get it checked tomorrow and get back.

03-26-2007, 11:12 PM	#1
hotshot1 Crab mustard is good Join Date: Oct 2006 Location: Matawan NJ Posts: 872 Credits: 1,838.6 Boat: Silverton 42 c Home Port: Morgan Best Catch: fish wise, none yet to mention Occupation: veterinarian	My boats vibrates Started my Yanmars 315 , they seem to be running very rough at idle. The boat really vibrates seems to be starboard engine, I increase the rpms and it all settles out and runs quiet. Is this just a tune up changing the plugs or should I be more concerned. Oil was changed at the end of January , It was already running a little rough towards the end of the year. Any suggestions would be appreciated

03-27-2007, 10:35 AM	#2
Avenger Sit down Shut up And fish Join Date: Jan 2007 Location: Long Island, NY Posts: 475 Credits: 1,603.6 Boat: 36' Hatteras Convertible Occupation: Pelagician	Hotshot1, Excuse me if this is a stupid question, but aren't Yanmars diesels? What plugs are you talking about? How many RPM do you have to pick up to get it to smooth out? Any smoke? If so what color? Does this happen hot, cold or all the time? How many cylinders on a 315? I'm assuming six, but I don't know Yanmars by model #. We need lots more information to do remote diagnosis. __________________ IE7 says this may be a phishing site....Well, DUH!!!!!!... Stupid jerks can't even spell fishing right.

03-27-2007, 01:55 PM	#5
Avenger Sit down Shut up And fish Join Date: Jan 2007 Location: Long Island, NY Posts: 475 Credits: 1,603.6 Boat: 36' Hatteras Convertible Occupation: Pelagician	I'm not particularly familiar with your engines, so I can't tell you how much vibration is normal. But I gather from your reply that this is a new condition. How long have you had these engines, and how many hours are on them? It may be time to get the injectors checked. Again, can you identify the color of the smoke? Blue or white is probably what you're seeing, and it can be difficult to tell them apart. If it's white smoke it's unburned fuel and will cause a burning sensation if it gets in your eyes (note: I don't recommend getting a facefull of exhaust) Blue smoke is engine lube oil and some smoke may be normal when the engines are cold. White smoke would also be an indication that injector service might be in order. Start simple and cheap and work your way up. I don't think I've ever been on a diesel boat that didn't have some buzz or vibration somewhere, so don't panic yet. Hope this helps. __________________ IE7 says this may be a phishing site....Well, DUH!!!!!!... Stupid jerks can't even spell fishing right.

03-27-2007, 09:39 PM	#8
blackwell50 I think Admin is going to let me have this space Join Date: Sep 2006 Location: Ft. Lauderdale,Fl. Posts: 1,376 Credits: 1,389.2 Occupation: sportfish captain	You need to change your fuel filters,make sure they are not running cold as that could cause slicking.Also it may need valve lash adjustment if it has not been done at the 1st big service after break in.Yanmars are very fuel sensative. __________________

03-27-2007, 10:03 PM	#9
Free Spirit Hide- My Wifes Logged On Join Date: May 2005 Location: Egg Harbor Twp Posts: 147 Credits: 1,245.5 Occupation: charter captain	YUP, SOUNDS LIKE THE VALVE ADJUSTMENT IS THE TICKET! __________________ Capt. Steve Bent Fishing from the Delaware Bay to the canyons on a custom built, fully equipped 34' Downeast vessel gotumon@comcast.net Free Spirit Fishing Charter Fishing New Jersey Phone-609-926-9017 Call for rates and dates

03-27-2007, 01:38 PM	#4
hotshot1 Crab mustard is good Join Date: Oct 2006 Location: Matawan NJ Posts: 872 Credits: 1,838.6 Boat: Silverton 42 c Home Port: Morgan Best Catch: fish wise, none yet to mention Occupation: veterinarian	they are six cylinders, It does smoke but doesn't seem excessive, they do vibrate in and out of gear , The vibration starts to settle down around 800 and is gone by 1100 rpms, sorry about the plug reference it was late and I wasn't thinking. I'm not the most handy around boats , I generally rely on other people to fix stuff for me, You need your dog or cat put back together I can do that very well. I ran it for about 1/2 hour today and did quiet down a little by the end only the transom door was vibrating and the head door. still a little smoke. The guy at the marina said a little vibration was normal and as long as it settles out it's ok. I don't know if he is correct and I am a little concerned.

03-27-2007, 07:22 PM	#6
hotshot1 Crab mustard is good Join Date: Oct 2006 Location: Matawan NJ Posts: 872 Credits: 1,838.6 Boat: Silverton 42 c Home Port: Morgan Best Catch: fish wise, none yet to mention Occupation: veterinarian	I would classify it as blue, I also get a little slick around the outflow, This has been the same since I got the boat in JULY, The engines have 140 hours. Avenger thank you for your help

03-27-2007, 09:33 PM	#7
homewrecker Anthony's Ark is a blowboater Join Date: Mar 2005 Location: kingsville md. Posts: 262 Credits: 1,422.0	hotshot the smoke at start up is normal for these engines unless you have block heaters on them.When they reach normal temps. they will usually clear up it is just the nature of high speed diesels.Change out all your filters and clean your air element then see what happens.GOOD LUCK

03-28-2007, 12:29 AM	#10
hotshot1 Crab mustard is good Join Date: Oct 2006 Location: Matawan NJ Posts: 872 Credits: 1,838.6 Boat: Silverton 42 c Home Port: Morgan Best Catch: fish wise, none yet to mention Occupation: veterinarian	Thanks all I will get it checked tomorrow and get back.

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