Shop manual for 3GM30F diesel engine

B

Boatman

Active member
Joined
Nov 2, 2009
Messages
35
Fluid Motion Model
C-24 C (Sterndrive)
Hull Identification Number
RFB02664D593
Vessel Name
TUG-ALONG
😀 I have searched to see if there has been previous posts re the above but found none. So...can anyone tell me where to locate a genuine Yanmar shop manual, not a owners manual. I am having difficulty starting the engine and have been hearing about the exhaust mixing elbow getting almost completely clogged and causing the problem. using a ether based starting fluid seems to be taboo. Some suggest using wd-40. However, I would like to get to the cause of the problem rather than masking it. Thus the SHOP MANUAL need. I am using a single 550 CCA capacity battery which seems to be marginal. This may be part of the problem, not sure.
 
I got my manual (for the 2009 3GM30) from my local Yanmar dealer. It had to be ordered. Cost $66.+

Gene
 
Isn't the engine in the R-21, and the R-21ec, a Yanmar 3 Ym 30? (mine is) If so, a very good link was posted on Dec 18th. covering manuals that can be downloaded for free. also troubleshooting guides. I've copied it below, hope it helps...

3YM30 Maintenance Information
by dloop on Fri Dec 18, 2009 5:51 am

A nice site a fellow in Australia put together on the 3YM30 engine.
http://psyberspace.com.au/yanmar/
 
The only thing I'm sure of is that my tug has an engine. :?

There is also an online service/maintenance manual available on the Yanmar site. I think. 😉

Gene
 
Hey Jack, my R21 "TUG-ALONG" is a 1993 and has the 3GM30F engine with about 550 hours on it. Thanks for the feed back though. Got another question. I think that back in the early 90's there was quite a bit of variation in the R21's as they evolved. I only have one battery located in the engine compartment. There is no house battery probably due to the minimal instrumentation on the 21's. I recently bought this through Ranger as a trade in. Does your's have one or two batteries. The reason I ask is two fold. A- my battery only has 550 CCA's which seems very marginal especially if the weather temps are below say 50 degrees. I have been using a starting spray to assist starting. B- I have noticed that there is a spark free switch for (1-ALL-2 ) battery positions with only one set of cables going to it which doesn't make much sense. The small wood box that houses the battery SW is mounted below the seat in the helm station and also has a 3-position SW for the bilge pump. The positions are- MANUAL, OFF, AUTO. It may be that this approach was used incase the owner ever felt a need to add a second battery. If you have 2 batteries where are they mounted?? How many cca's are you getting by with?
 
Thanks Gene. I thought you could buy just about everything on the net now a days. I sure couldn't locate any manuals by YANMAR. I hear it is worth paying the extra $$ to get one by Yanmar. Joe


rt11002003":1yaykrl5 said:
I got my manual (for the 2009 3GM30) from my local Yanmar dealer. It had to be ordered. Cost $66.+

Gene
Click to expand...
 
Hi, my R21 is a 2005 but in a previous boat I installed a 3GM30F engine (albin 25). To be honest I really don't see a lick of difference from the 3YM30 ( I don't think my 3gm30f had a glowplug though). As a learning tool . I really recommend you check out the manual link I gave you. Also, check the "troubleshooting checklist" there as well...550 hours on any small diesel is next to nothing, and it really should be starting easily. . An engine that new should never need to use starting spray...ever. You've got a problem that needs fixing, it could be something as simple as the decompression being stuck "on" or even a small leak that allows fuel to drain from the injectors when the engine sits, or some really crappy old fuel. My experience with either engine at any temperature is they've never needed to crank for more than 2 or 3 seconds to start.

I'm not real familiar with the battery setup on the older 21's, I have 2 located by the engine (like the EC's do but I just recently put them there when I moved the fuel tank to the stern locker. My battery selector switch is located in the Starbrd cabinet. You should remove the battery and get it bench loadtested to see if it is any good. I have no idea if they came with 2 batteries in "93 but the switch could indicate it had 2 at some time in it's past. What kind of charger do you have? If you need a new battery get at least a goup 27 with lots of reserve power, buy quality, don't go cheap, and take care of it so it lasts several years

I'm not a big fan of bilge pump switches with an "off" position. I prefer the ones with just 2 selections..."Manual/test" and 'auto".(the "manual/test" should be a momentary switch and there should be a brite light that comes on whenever the bilge pump runs). It's too easy to leave the switch off accidentally. Remember that the pump must always be wired directly to the battery(s) so it will still work even with the battery main switch off.
 
I know in the archieves there is a url for a downloadable exact copy of the service manual. Start digging its there. Maybe even a google search will find it. One note for starting a diesel if you do not have starting fluid or know better you can do this cheap trick. A little gas on a rag near the intake will do the same thing. All the normal cautions would apply but this is how I get my one lugger generator running. I can tell you be careful so you dont suck the rag into the intake. Been there and done that. Bob Heselberg in Eatonville Wa
 
The Yanmar Manuals are right here on Tugnuts. In the Forum Index look under the Ranger Tugs Factory Support header for the Technical Bulletins forum. Andrew Custis has posted a link to the manuals on this page viewtopic.php?f=7&t=520

The link he posted here gets you to just about every Yanmar Service Manual you would ever want.

Hope this helps,

Eric
 
I've looked at all the online links posted to this forum. They are great, as long as one can get online. 🙂

I bought the paper copy for the times wifi and cell phone signals aren't available. I was in a number of places in FL over the Christmas holiday where I couldn't get a cell phone signal, much less wifi. 🙁

Paper manuals are, to me, like paper charts, primary tools. Electricals are great, when they are working. At present my laptop is acting crazy, has been ever since I connected to a DSL (which gave erratic performance) in a motel in Thomasville, GA. I've also had GPS satellite reception problems during storms.

Can't be too careful.

Gene
 
Hi Gene,
I downloaded a copy to my computer and then made a copy (18mb) onto a usbflash drive as well. I'll print off any pages as I need them. or use the flashdrive with my laptop if need be. No need to go online or to the boat everytime I want to look at the shop manual. The troubleshooting guide I'm going to print and laminate to keep on the boat. Other than the basic stuff that you'll get familiar with pretty quickly a great deal of what the service manual contains isn't something you'll be able to do much with unless you're ashore and have all the tools, guages and loads of ability. Things like working on injectors,valves and timing is best left to the pros.
One thing you're VERY correct about is that a hard copy is best. I have a hard copy service manual too and that is probably what I'd give to the mechanic that would do any major work as a reference. The electronic copies are great for reading or looking something up, and are better than not having anything . Also, they allow you to leave the hard copy aboard and still check things out when you're at home and the boat isn't. a copied page also keeps my greasy prints off the manual pages or can be e-mailed to someone.
 
I agree with you, SlackwaterJack. I've downloaded a number of the files and printed them, but not the maintenance manual. Never thought about the flashdrives. Thanks for the reminder. 😀

I've been working with/using computer since the days of the patchboards(?) and punch cards; patchboards(?): the ones with the wires that one used to program with. So many years of systems going down when I needed them made me gun shy. As I mentioned, my laptop has been crazy for about a week. However, I hope I cured it awhile ago. Messed around with some of the settings. We'll see. Glad I wasn't somewhere using it to navigate. Of course, a 17 inch laptop doesn't really fit well in a R-21 EC. 😉

Gene
 
I have both. The manual was ordered from Yanmar and then I discovered the online manual. I have it loaded on the laptop computer that I take with me on the boat. If I need it well its handy and the printed manual is here with the rest of my workshop books. Just one thing to remember that cylinder number one is to the back of the boat. Bob Heselberg in Eatonville Wa
 
:? Well guys, I just wanted to thank all who have given their input re shop manuals and the battery saga. I have some information which may be of help in the future re battery capacity and getting all that electrical energy to the starter where it is needed. I think for clarity purposes I should do so under a seperate posting. Joe
 
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