Green Tractor Talk banner

1 - 20 of 88 Posts

·
Registered
Joined
·
408 Posts
Discussion Starter #1
Just got done bring these gators home. Hope to make one out of the two to start with. One has an engine that appears to be locked up so I will need to check that out.
 

Attachments

·
Registered
Joined
·
1,451 Posts

·
Registered
Joined
·
408 Posts
Discussion Starter #4
Since I can't see the fuel cap in your pictures (it is on the other side of the vehicle...) I don't know if these are diesel or gas engines. I do have some information for either, so I will take a chance and put some gas Gator info here first.
View attachment 333378

Here is a useful set of parts drawings as well...
View attachment 333386

Chuck
Both gas Kawasaki powered. Thanks for the manual info, Chuckv.
 

·
Premium Member
Joined
·
13,933 Posts
Nice, when I first looked at the photos thought same machine ,just different angles. Then after the 2nd look ,,OK windshield on one not the other.

Hope you can at least get one of them running...

:bigthumb:
 

·
Registered
Joined
·
408 Posts
Discussion Starter #9
I did a little work on the gator engine that isn't seized. Check oil, spark, and fuel to carb. Everything was good so I tried to start it. Fired right away on starting fluid, but wouldn't keep running. Pulled the carb and found gunk plugging the jets. After a quick cleaning tried it again and it runs, but only on one cylinder. Cleaned the plugs and it seemed to pick up the other cylinder for a bit and then it dropped out again. Figure I will try a compression test next. Maybe I should pull the rocker cover first just to check things out.
 

·
Registered
Joined
·
408 Posts
Discussion Starter #10 (Edited)
Here is a vid of it running.

 

·
Registered
Joined
·
408 Posts
Discussion Starter #11
I checked compression and found both cylinders at 100#. Tried swapping the plugs side to side and the same cylinder wouldn't fire. Swapped a coil no change. Swapped igniter box same thing. I did remove the rocker cover and while rolling over by hand the exhaust valve seemed to stick and snapped shut. I was able to get it to do that one more time and then it seemed to work fine. Not sure what's going on there. Anyone got any idea's on what's up with that cylinder and what to do next?
 

·
Registered
Joined
·
408 Posts
Discussion Starter #12
Here are the engine specs. Looks like they Call for a minimum cylinder pressure of 170 psi, but that doesn't explain the one cylinder that fires. :unknown:

ENGINE - GAS (LIQUID-COOLED) SPECIFICATIONS
Specifications
General Specifications
Make. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Kawasaki
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FD620D (AS11-JS11)
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-cycle gas/Liquid Cooled
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.4 kW (18 hp)
Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 mm (2.900 in.)
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 mm (2.660 in.)
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617 cm3 (37.7 cu-in.)
Spark Plugs
Engine Models through FS11 . . . . . . . . . . . . . . . . . . . . NGK # BMR2A-10 (AM122402) or Champion RH18Y (TY6082)
Engine Models GS11 and later . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NGK # BPR2ES (M138938)
Test and Adjustment Specifications
Engine:
Oil pressure sensor activates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 kPa (14.2 psi)
Oil pressure (minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276 kPa (40 psi)
Oil filter bypass valve opening pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78.5 - 117.5 kPa (11.4 - 17.1 psi)
Cylinder compression pressure (minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1171 kPa (170 psi)
Maximum compression pressure variation between cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138 kPa (20 psi)
Crankcase vacuum (minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 mm (1 in.) H2O
Intake and exhaust valve clearance (cold) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 mm (0.01 in.)
Intake and exhaust valve adjustment interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 hrs
Valve clearance adjusting nut torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 N•m (79 lb-in.)
Fuel/Air System:
Fuel Pump
Minimum flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 ml (3.5 oz) in 15 seconds
Minimum pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 kPa (1.5 psi)
Carburetor SLOW idle mixture screw initial setting (FD620D-AS11 - CS11). . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 Turns
Carburetor SLOW idle stop screw setting . . . . 50 rpm less than throttle control arm SLOW idle stop screw setting
Throttle Cable Throttle control arm SLOW idle stop screw setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1125 ± 75 rpm
Throttle control arm FAST idle stop screw setting
FD620D-AS11 - BS11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3650 ± 50 rpm
FD620D-CS11 - JS11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3850 ± 75 rpm
Air Restriction Indicator
Normal restriction vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 - 178 mm (4 - 7 in.)
Maximum restriction vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 381 mm (15 in.)
Fuel Tank
Check valve opening pressure (maximum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 kPa (0.4 psi)
 

·
Registered
Joined
·
256 Posts
I checked compression and found both cylinders at 100#. Tried swapping the plugs side to side and the same cylinder wouldn't fire. Swapped a coil no change. Swapped igniter box same thing. I did remove the rocker cover and while rolling over by hand the exhaust valve seemed to stick and snapped shut. I was able to get it to do that one more time and then it seemed to work fine. Not sure what's going on there. Anyone got any idea's on what's up with that cylinder and what to do next?
If the EX valve is sticking AT ALL when you turn in over then it is time to ream the valve guide...this is not uncommon on an aircooled engine .they carbon up due to the super high temps of an air cooled head.in fact very common on older air cooled aircraft engines..that are not properly cooled down before shutdown
 

·
Administrator
Joined
·
20,280 Posts
I used to add MMO to avgas in the airplanes I maintained on a regular basis. It's the only additive that's approved by the FAA, and it works. If you have a sticking valve, MMO will help by adding a bit to the oil in addition to the fuel. Good stuff.
 

·
Registered
Joined
·
408 Posts
Discussion Starter #18

·
Registered
Joined
·
3,228 Posts

·
Registered
Joined
·
256 Posts
It's pretty much automatic transmission fluid. Mystery solved. lol

LOL...the old timers I worked with Swore by MM. it is pretty much just snake oil. LOL it doesn't work..We still ended up reaming the valve guide's every hundred hour to prevent or stop the morning sickness anyways
 
1 - 20 of 88 Posts
Top