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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a new forum dedicated to diesel engines and their applicable accessories.


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  #1  
Old 06-12-2010
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Kubota diesel troubles

Kubota engine seems to have trouble turning over... It will with much time/effort, but it's struggling mightily. Suggestions?
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Old 06-12-2010
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Little more info needed

1) does it seem locked up as in , it will only turn a tiny bit with each turn of the key....Possibly Hydraulically locked or badly rusted by water through the exhaust ports.

2) how long has it been sitting unused or if used regularly when did this start happening?...and what were you doing right before this all came about?

3) Don't think these a dumb question OK...Is your battery fully charged? and all connections CLEAN?

4) Are you out of gear?

5) How old is the starter?...do you have an amp meter to check starter draw?
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Old 06-12-2010
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I always check all battery connections first. Seems like the engine ground is always the one that corrodes and causes problems.
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Old 06-12-2010
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I agree with Still, need more info.
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Old 06-15-2010
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I have a 31 year old Yanmar 2GM that seems to have seized up in the past 60 days since it last ran (damned job got in my way from my life priority) new battery, new starter, not in gear, won't hand crank even with my 230lbs on the handle. may resort to C4. Ideas?
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Old 06-15-2010
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have you released your compression and tried turning it over by hand?
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Old 06-19-2010
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Hey all,

sorry for late response-- was working on the clipper round the world yachts all week (very cool).. Anyway, as you asked :

1) does it seem locked up as in , it will only turn a tiny bit with each turn of the key....Possibly Hydraulically locked or badly rusted by water through the exhaust ports? Doesn't seem that way.. It does turn over a little, but it's almost like it's choking, or forcing the issue... Certainly not reliable if I were to get caught offshore.

2) how long has it been sitting unused or if used regularly when did this start happening?...and what were you doing right before this all came about? Engine was winterized, and beforehand was owned by someone who kept boat moored almost always.

3) Don't think these a dumb question OK...Is your battery fully charged? and all connections CLEAN? Have had previous battery issues; theyve since been replaced, and connections are clean yes.

4) Are you out of gear? Certainly not ;-)

5) How old is the starter? Starter is older, but was checked twice and seemed ok...
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Old 06-20-2010
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Quote:
Originally Posted by gypsy22 View Post
1) does it seem locked up as in , it will only turn a tiny bit with each turn of the key....Possibly Hydraulically locked or badly rusted by water through the exhaust ports? Doesn't seem that way.. It does turn over a little, but it's almost like it's choking, or forcing the issue... Certainly not reliable if I were to get caught offshore.
If you have salt water in the cylinders, the engine will not budge and without stripping and possibly a 4 pound hammer you will have no movement at all.
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Old 06-20-2010
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Quote:
Originally Posted by Mwozniak View Post
have you released your compression and tried turning it over by hand?
Try this! It will determine if its friction in the engine or a weak starter or battery.
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Old 06-20-2010
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Kubotas do not have decompression levers, you would have to remove the injectors to achieve this.
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