Starting Lanmar 1GM Diesel - CD-25D

[Vinnie Gennaro]

I resently bought a '82 25D. I notice when starting the engine, that the engine will turn over one time then stop. After a short pause (1 to 2 sec.) the engine will kick over and start. Is this a normal start sequence for the Lanmar 1GM???

Thanks,

Vinman



vincent.gennaro@pss.boeing.com

[Bill]

Vinman

Check your battery connections. I had the same problem with my boat this spring. After thinking the old "it worked before I worked on the batteries, why isnt it working now?" routine i went back and double checked my connections at the battery terminals. And sure enough on was loose....Tightened it up and problem solved.

Hope your's is that simple. And it sounds very similiar.

Happy New Year.

Bill



I resently bought a '82 25D. I notice when starting the engine, that the engine will turn over one time then stop. After a short pause (1 to 2 sec.) the engine will kick over and start. Is this a normal start sequence for the Lanmar 1GM???

Thanks,

Vinman

cd25d@rhapsodysails.com

[Mark Yashinsky]

If not the connections, what EXACTLY are you doing when the engine "pauses". Are you still pushing the starter button, or does it pause and you release the starter then try again???

[Vinnie]

Mark,

I leave the starter button engauged. The pause has never lasted more than 2 seconds.

Vinnie

If not the connections, what EXACTLY are you doing when the engine "pauses". Are you still pushing the starter button, or does it pause and you release the starter then try again???



vincent.gennaro@pss.boeing.com

[chuck yahrling]

I resently bought a '82 25D. I notice when starting the engine, that the engine will turn over one time then stop. After a short pause (1 to 2 sec.) the engine will kick over and start. Is this a normal start sequence for the Lanmar 1GM???

Thanks,

Vinman

Vince;

If you are using deep-cycle batteries to crank it may be due to the ability of the battery(s) to supply the amperage. I have 3 gr27 (110AH)deep cycles on my house bank and one small car starter battery on the starter bank. The little starter battery gives healthier cranking to my Yanmar 2GM by itself than the 3 deep cycle batteries in parallel. I get the the same "pausing" unless I've just finished charging them and test fire the engine. If I wait a while and do the test, the cranking again hesitates.

I think it is explanable in terms of surface charge being immediately available after a charging period, but then "sinking in" to the deep cycle battery plates after a period of quiesence. Starter batteries have thinner plates with more surface area, so they can supply a bigger jolt (but for a shorter period)and are better matched for a load like a starter motor.

A work-around might be to letup on the starter button for 10-15 seconds between cranking.



cyahrlin@cisco.com

[vinnie]

Chuck,

I getting in impression that what I need are batteries which higher cranking capacity. I haven't looked at my batteries yet to see what the cranking amperage is. I'm waiting for the weather to break so I can open up the engine and battery compartments and start troubleshooting. During minor initial troubleshooting I have found corrosion on the terminals and a sloppy (loose)drive belt on the alternater. These are simple items to fix. I will also check the system for open contacts.

Thanks for your suggestions. In time I will look into it all.

Happy New Year.

Vinnie

I resently bought a '82 25D. I notice when starting the engine, that the engine will turn over one time then stop. After a short pause (1 to 2 sec.) the engine will kick over and start. Is this a normal start sequence for the Lanmar 1GM???

Thanks,

Vinman

Vince;

If you are using deep-cycle batteries to crank it may be due to the ability of the battery(s) to supply the amperage. I have 3 gr27 (110AH)deep cycles on my house bank and one small car starter battery on the starter bank. The little starter battery gives healthier cranking to my Yanmar 2GM by itself than the 3 deep cycle batteries in parallel. I get the the same "pausing" unless I've just finished charging them and test fire the engine. If I wait a while and do the test, the cranking again hesitates.

I think it is explanable in terms of surface charge being immediately available after a charging period, but then "sinking in" to the deep cycle battery plates after a period of quiesence. Starter batteries have thinner plates with more surface area, so they can supply a bigger jolt (but for a shorter period)and are better matched for a load like a starter motor.

A work-around might be to letup on the starter button for 10-15 seconds between cranking.

[Mark Yashinsky]

Go over all your starting circuit connections. Are they clean and tight. Do you have this hesitation on restarts thru the day or is only the first one of the day??? Another test, on the first start, set your throttle to idle, and flip the comperssion release lever to the release position and operate the starter so that the engine does 3-4 complete revolutions. Stop and reset the compression release lever to the normal position and try starting your engine in the normal manner. Does it "hesitate"??? Note, the compression release lever might not want to stay in the release position (2 person operation). the 1GM is not a big engine, trying to compress a lot of air or many cylinders of air. The 2gm "can" be started by hand (NOT RECOMMENDED though) and the 1GM is even smaller. You can almost pick it up and throw it under arm. It does not have high load demands of the starter and the starting circuit, but as w/ all diesels, it does demand a good starting circuit (including the starter). How old is the engine??? The solenoid (and/or starter) might need some internal cleaning of the contacts or communtator. Need to do some amp tests of the batteries and starter circuit before you start changing stuff.

[vinnie]

Mark,

Sounds like some good troubleshooting advice and systematic checks. I'll let you know the rsults.

Vinman


Go over all your starting circuit connections. Are they clean and tight. Do you have this hesitation on restarts thru the day or is only the first one of the day??? Another test, on the first start, set your throttle to idle, and flip the comperssion release lever to the release position and operate the starter so that the engine does 3-4 complete revolutions. Stop and reset the compression release lever to the normal position and try starting your engine in the normal manner. Does it "hesitate"??? Note, the compression release lever might not want to stay in the release position (2 person operation). the 1GM is not a big engine, trying to compress a lot of air or many cylinders of air. The 2gm "can" be started by hand (NOT RECOMMENDED though) and the 1GM is even smaller. You can almost pick it up and throw it under arm. It does not have high load demands of the starter and the starting circuit, but as w/ all diesels, it does demand a good starting circuit (including the starter). How old is the engine??? The solenoid (and/or starter) might need some internal cleaning of the contacts or communtator. Need to do some amp tests of the batteries and starter circuit before you start changing stuff.

[Mark Yashinsky]

Not here in New York....