Specifications
| Frequency | 60.0 Hz |
|---|---|
| Standby power | 15 kW |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Fuel filter | Secondary | 258423 | Amazon eBay $36.43 PartsGeek |
Common questions
What is the power rating of the Kohler 15RMY?
The Kohler 15RMY is rated 15 kW standby.
Troubleshooting
25Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| High Water Temperature (HWT) | High water temperature in engine | Closed HWT contacts place ground on magneto, stopping engine. |
| Low Oil Pressure (LOP) | Low oil pressure in engine | Closed LOP contacts place ground on magneto, stopping engine. |
| Shutdown occurs if engine does not start after approximately 30 seconds of cranking. | OVERCRANK | |
| Shutdown occurs approximately 30 seconds after fault. | HIGH TEMPERATURE, LOW OIL PRESSURE | |
| Battery and A.D. lamps of Fast Check should light if red (+) and black (-) harness leads are properly connected | Check wiring to 1CR, replace uni-board | |
| CRK. lamp alone does not light (voltage not conducted to starter circuit) | Replace uni-board, fix 1CR relay wiring or replace relay | |
| No or low AC output | Blown fuse on sensing leads V7, V8 and V9; regulator board or SCR module overcurrent condition; exciter field issue; controller issue; stator winding problem; rotor resistance or ground issue. | Check for blown fuses. Check controller and exciter field. Inspect stator windings, rotor resistance, and grounding. |
| Generator Set will stop. | 3-Amp fuse 'blows'. | Check fuse. If blown, replace the fuse and attempt to restart generator set. |
| Unit will not crank with a blown 15-Amp fuse. | Blown 15-Amp fuse due to overcurrent in CR and 1CR relay contacts from a short in the wiring or engine accessories. | If this fuse blows while the generator set is running, the unit will shut down. |
| No AC output. | Unbalanced stator windings or no continuity between 'quick disconnect' point on each brush lead and its adjacent slip ring. | Check for continuity. Repair or replace assembly if fault is detected. |
| Battery voltage switched to starter (engine not necessarily turning). | Lights only during ‘‘on-crank’' cycles. | |
| CR relay coil energized. | Deenergizes C relay | |
| 1TS contacts in series with CR relay open to stop cranking (or stop unit if started and producing no AC output). | The overcrank reset switch must be activated to reset 1TS contacts. | |
| CR relay energized. | Initiates cranking, Energizes ignition circuit, Energizes 1TS circuit, Energizes primary field, Energizes hourmeter, Energizes anti-diesel solenoid (Gasoline only), Energizes water valve (city-water cooled only), Energizes choke (Gasoline only), Energizes gas valve (Gasoline only) | |
| SDR relay energized. | Locks in SDR relay, Energizes reset lamp, Deenergizes CR coil | |
| Fuse blown. | If set has stopped due to causes other than lack of fuel, or fault shut-down — check fuse. If blown, replace the fuse and attempt to restart generator set. | |
| Overspeed simulated. | Engine overspeed | |
| Low fuel simulated. | L.F. — low fuel | |
| Low engine water temperature simulated. | L.W.T. — low engine water temperature | |
| Anticipatory (low) oil pressure simulated. | A.O.P. — anticipatory (low) oil pressure | |
| Anticipatory (high) water temperature simulated. | A.W.T. — anticipatory (high) water temperature | |
| Low oil pressure simulated. | L.O.P. — low oil pressure | |
| High water temperature simulated. | H.W.T. — high water temperature | |
| Generator set stopped due to blown fuse. | If the set will not start, or if the fuse blows again, locate and correct the cause. | |
| No or low AC output. | Unbalanced stator windings or no continuity between 'quick disconnect' point on each brush lead and its adjacent slip ring. | Check for continuity. Repair or replace assembly if fault is detected. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
250| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 230993 | Hose | Hose | PartsGeek | |
| 240976 | Switch, high temperature 268298 Sender, temperature | Sensor | PartsGeek | |
| 241062 | Plug, drain | Spark plug | PartsGeek dieselpartscenter $41.63 | |
| 241063 | Gasket | Gasket | PartsGeek | |
| 241260 | Gasket, manifold | Gasket | PartsGeek | |
| 241261 | Gasket, manifold | Gasket | PartsGeek | |
| 241481 | Switch, high temperature 268298 Sender, water temperature | Sensor | PartsGeek | |
| 241623 | Sensor, speed (all models) | Sensor | PartsGeek | |
| 250081 | Clamp, hose (2) | Hose | PartsGeek | |
| 256024 | Gasket | Gasket | PartsGeek | |
| 256262 | Bracket, air cleaner | Air filter | PartsGeek | |
| 256282 | Gasket, adapter | Gasket | PartsGeek | |
| 256283 | Gasket, fuel pump | Gasket | PartsGeek | |
| 258024 | Gasket, exhaust flange (2) | Gasket | PartsGeek | |
| 258300 | Housing, thermostat | Thermostat | PartsGeek | |
| 258311 | Bracket, air cleaner | Air filter | PartsGeek | |
| 258315 | Gasket (2) | Gasket | PartsGeek | |
| 258322 | Hose, upper radiator | Hose | PartsGeek | |
| 258342 | Hose, molded | Hose | PartsGeek | |
| 258345 | Guard, belt | Belt | PartsGeek | |
| 258346 | Bracket, belt guard | Belt | PartsGeek | |
| 258347 | Bracket, belt guard | Belt | PartsGeek | |
| 258348 | Bracket, belt guard | Belt | PartsGeek | |
| 258423 | Element, air cleaner | 1 | Air filter | Amazon eBay $36.43 PartsGeek |
| 258518 | Guard, belt front | Belt | PartsGeek | |
| 258531 | Fan | Belt | PartsGeek | |
| 258538 | Bracket, air cleaner (32.5RZ) | Air filter | PartsGeek | |
| 258622 | Gasket, thermo | Gasket | PartsGeek | |
| 259010 | Gasket, flange (2) | Gasket | PartsGeek | |
| 259023 | Gasket, exhaust flange | Gasket | PartsGeek | |
| 259027 | Gasket | Gasket | PartsGeek | |
| 259180 | Elbow, hose | Hose | PartsGeek | |
| 259181 | Housing, thermostat | Thermostat | PartsGeek | |
| 259187 | Gasket, exhaust (2) | Gasket | PartsGeek | |
| 259194 | Fan | Belt | PartsGeek | |
| 259197 | Spacer, fan | Belt | PartsGeek | |
| 259331 | Link, alternator adjusting | Alternator | PartsGeek | |
| 259333 | Belt | Belt | PartsGeek | |
| 259363 | Element, air cleaner | Air filter | PartsGeek | |
| 259504 | Fan | Belt | PartsGeek | |
| 259520 | Gasket | Gasket | PartsGeek | |
| 259535 | Gasket | Gasket | PartsGeek | |
| 259537 | Housing, thermostat | Thermostat | PartsGeek | |
| 259540 | Gasket | Gasket | PartsGeek | |
| 259544 | Bracket, belt guard | Belt | PartsGeek | |
| 259553 | Adpater, fan | Belt | PartsGeek | |
| 259635 | Hose, upper | Hose | PartsGeek | |
| 259637 | Belt | Belt | PartsGeek | |
| 259672 | Adapter, air cleaner | Air filter | PartsGeek | |
| 259673 | Gasket, air cleaner | Gasket | PartsGeek | |
| 259772 | Bracket, belt guard | Belt | PartsGeek | |
| 259773 | Guard, belt | Belt | PartsGeek | |
| 259787 | Shroud, fan | Belt | PartsGeek | |
| 259813 | Bracket, belt guard | Belt | PartsGeek | |
| 259814 | Guard, belt | Belt | PartsGeek | |
| 259815 | Belt, fan | Belt | PartsGeek | |
| 259866 | Shroud, fan | Belt | PartsGeek | |
| 259874 | Guard, belt | Belt | PartsGeek | |
| 259875 | Bracket, belt guard | Belt | PartsGeek | |
| 259880 | Bracket, belt guard | Belt | PartsGeek | |
| 259881 | Bracket, belt guard | Belt | PartsGeek | |
| 259882 | Bracket, belt guard | Belt | PartsGeek | |
| 259883 | Guard, belt | Belt | PartsGeek | |
| 259902 | Shroud, fan | Belt | PartsGeek | |
| 259920 | Belt | Belt | PartsGeek | |
| 259929 | Gasket, turbocharger | Gasket | PartsGeek | |
| 259964 | Bracket, air cleaner | Air filter | PartsGeek | |
| 264390 | Sender, oil pressure | Sensor | PartsGeek | |
| 269368 | Panel, side (2) (22.5R2, 259956 Fan (all models) | Belt | PartsGeek | |
| 269425 | Guard, fan (10RMOY, A-239362 Rotor (17.5ROY) | Belt | PartsGeek | |
| 271662 | Alternator Assembly | Alternator | PartsGeek | |
| 285255 | Gasket, manifold | Gasket | PartsGeek | |
| 285259 | Hose, manifold inlet | Hose | PartsGeek | |
| A-259763 | Air filter assembly | Air filter | PartsGeek | |
| B-258506 | Pump assembly | Pump | PartsGeek | |
| X-528-5 | Hose, lower radiator | Hose | PartsGeek | |
| 151385 | Elbow, street (2) | Service part / kit | PartsGeek | |
| 151511 | Ring, lock (15ROY,17.5ROY) | Service part / kit | PartsGeek | |
| 151771 | Elbow, pipe | Service part / kit | PartsGeek | |
| 153016 | Bushing, reducing | Service part / kit | PartsGeek | |
| 164037 | Cross, pipe (1SRMOY) | Service part / kit | PartsGeek | |
| 168068 | Stud, grounding (all models) | Service part / kit | PartsGeek | |
| 168848 | Bushing, reducer | Service part / kit | PartsGeek | |
| 223316 | Fuse, 10 amp | Service part / kit | PartsGeek | |
| 230455 | Stud, carburetor (2) | Service part / kit | PartsGeek | |
| 233442 | Relay, cranking | Service part / kit | PartsGeek | |
| 235496 | Spring | Service part / kit | PartsGeek | |
| 238157 | Terminal, alarm horn | Service part / kit | PartsGeek | |
| 238426 | Hoider, fuse | Service part / kit | PartsGeek | |
| 238565 | Bracket (15ROY) | Service part / kit | PartsGeek | |
| 238736 | Voltmeter | Service part / kit | PartsGeek | |
| 239247 | Holder, brush (ail models) | Service part / kit | PartsGeek | |
| 240978 | Switch, low oil pressure | Service part / kit | PartsGeek | |
| 241074 | Joint, ball | Service part / kit | PartsGeek | |
| 241593 | Cup, pick-up (all models) | Service part / kit | PartsGeek | |
| 242698 | Resistor | Service part / kit | PartsGeek | |
| 243035 | Bushing (15ROY) | Service part / kit | PartsGeek | |
| 243273 | Fuse, 3 amp | Service part / kit | PartsGeek | |
| 244210 | Mount (4) | Service part / kit | PartsGeek | |
| 244621 | Valve, gas | Service part / kit | PartsGeek | |
| 244914 | Valve, gas (12 volt DC) | Service part / kit | PartsGeek | |
| 245748 | Relay | Service part / kit | PartsGeek | |
| 248324 | Neck, fill | Service part / kit | PartsGeek | |
| 248362 | Relay, (CR, 1CR) | Service part / kit | PartsGeek | |
| 250506 | Sr oRM Ov 175ROY) (not shown) 239282 Brush (15RMY, 15RMOY) | Service part / kit | PartsGeek | |
| 250508 | Spacer, generator adapter 238248 Shim (ail models) | Service part / kit | PartsGeek | |
| 250530 | 10RMOY, 15RMOY | Service part / kit | PartsGeek | |
| 250545 | Skid | Service part / kit | PartsGeek | |
| 250553 | 10RMOY, 15RMOY, 282814 Voltmeter | Service part / kit | PartsGeek | |
| 250555 | Panel, right side (10RMOY, 15RMY, 17.5ROY) | Service part / kit | PartsGeek | |
| 250556 | Bracket, end (10RMOY, 238134 “Ring, collector | Service part / kit | PartsGeek | |
| 250562 | Arm, solenoid | Service part / kit | PartsGeek | |
| 250566 | Ball, joint | Service part / kit | PartsGeek | |
| 250587 | Adapter, generator 259806 Stator, 600 Volt (all models) | Service part / kit | PartsGeek | |
| 256022 | Switch, oil pressure | Service part / kit | PartsGeek | |
| 256270 | Bracket, diaphragm | Service part / kit | PartsGeek | |
| 256271 | Rod, diaphragm | Service part / kit | PartsGeek | |
| 256275 | Bracket, end (1S5RMY) | Service part / kit | PartsGeek | |
| 256280 | Adapter | Service part / kit | PartsGeek | |
| 256297 | Adapter, carburetor | Service part / kit | PartsGeek | |
| 258037 | Cap, pressure | Service part / kit | PartsGeek | |
| 258316 | Skid (17.5ROY) | Service part / kit | PartsGeek | |
| 258317 | Skid (24ROZ) | Service part / kit | PartsGeek | |
| 258321 | Housing, flywheel | Service part / kit | PartsGeek | |
| 258323 | Panel, rear | Service part / kit | PartsGeek | |
| 258326 | Flange, pipe | Service part / kit | PartsGeek | |
| 258327 | Support, radiator | Service part / kit | PartsGeek | |
| 258328 | Support, radiator | Service part / kit | PartsGeek | |
| 258330 | Support | Service part / kit | PartsGeek | |
| 258331 | Bracket | Service part / kit | PartsGeek | |
| 258338 | Tube | Service part / kit | PartsGeek | |
| 258339 | Flange, exhaust | Service part / kit | PartsGeek | |
| 258340 | Shield, exhaust | Service part / kit | PartsGeek | |
| 258356 | Stator (standard) (22.5RZ, (all models) | Service part / kit | PartsGeek | |
| 258388 | Thermometer | Service part / kit | PartsGeek | |
| 258407 | Rod, fuel shutoff | Service part / kit | PartsGeek | |
| 258408 | Bracket, solenoid | Service part / kit | PartsGeek | |
| 258514 | Tank, surge | Service part / kit | PartsGeek | |
| 258519 | Support, tank (2) | Service part / kit | PartsGeek | |
| 258530 | Bracket, fuel valve | Service part / kit | PartsGeek | |
| 258532 | Adapter, oil drain | Service part / kit | PartsGeek | |
| 258547 | Panel, rear | Service part / kit | PartsGeek | |
| 258552 | Support, radiator | Service part / kit | PartsGeek | |
| 258553 | Support, radiator | Service part / kit | PartsGeek | |
| 259009 | Flange, exhaust | Service part / kit | PartsGeek | |
| 259011 | Plate, fuel block (15ROY) | Service part / kit | PartsGeek | |
| 259018 | Bracket, spring | Service part / kit | PartsGeek | |
| 259024 | Flange, exhaust | Service part / kit | PartsGeek | |
| 259035 | Bracket, block heater mtg. | Service part / kit | PartsGeek | |
| 259071 | Bracket, solenoid mtg. 286546 Arm, solenoid | Service part / kit | PartsGeek | |
| 259112 | Spacer | Service part / kit | PartsGeek | |
| 259113 | Stud (3/8-24) (3) | Service part / kit | PartsGeek | |
| 259158 | Brush (2) | Service part / kit | PartsGeek | |
| 259159 | Coil assembly | Service part / kit | PartsGeek | |
| 259160 | Armature assembly | Service part / kit | PartsGeek | |
| 259182 | Elbow, water | Service part / kit | PartsGeek | |
| 259185 | Support, guard | Service part / kit | PartsGeek | |
| 259195 | Manifold, exhaust | Service part / kit | PartsGeek | |
| 259198 | Plate, exhaust manifold | Service part / kit | PartsGeek | |
| 259209 | Cover, end | Service part / kit | PartsGeek | |
| 259275 | OISRMY.17SROY) | Service part / kit | PartsGeek | |
| 259293 | Skid | Service part / kit | PartsGeek | |
| 259330 | Tube, water | Service part / kit | PartsGeek | |
| 259357 | Tray (15ROY) | Service part / kit | PartsGeek | |
| 259360 | 32.5RZ, 32.5ROZ | Service part / kit | PartsGeek | |
| 259361 | Strap, canvas | Service part / kit | PartsGeek | |
| 259410 | Stiffener, shroud | Service part / kit | PartsGeek | |
| 259411 | Stiffener, shroud | Service part / kit | PartsGeek | |
| 259412 | Support, housing (RH) | Service part / kit | PartsGeek | |
| 259413 | Support, housing (LH) | Service part / kit | PartsGeek | |
| 259414 | 47.5ROZ | Service part / kit | PartsGeek | |
| 259422 | Panel, front | Service part / kit | PartsGeek | |
| 259428 | Shroud, housed radiator | Service part / kit | PartsGeek | |
| 259429 | Shroud, radiator housed | Service part / kit | PartsGeek | |
| 259430 | Shroud, radiator (22.5RZ) | Service part / kit | PartsGeek | |
| 259431 | Shroud, radiator | Service part / kit | PartsGeek | |
| 259432 | Solenoid, linear (use with (22.5ROZ) | Service part / kit | PartsGeek | |
| 259446 | Panel, side (2) (47.5ROZ) | Service part / kit | PartsGeek | |
| 259447 | Plate, closure (2) (47.5ROZ) | Service part / kit | PartsGeek | |
| 259450 | 47.5ROZ | Service part / kit | PartsGeek | |
| 259490 | Package, SCR power | Service part / kit | PartsGeek | |
| 259507 | Manifoid | Service part / kit | PartsGeek | |
| 259522 | Flange, exhaust | Service part / kit | PartsGeek | |
| 259534 | Adapter, exhaust | Service part / kit | PartsGeek | |
| 259551 | Bracket | Service part / kit | PartsGeek | |
| 259555 | Bracket, heater mtg. | Service part / kit | PartsGeek | |
| 259590 | Grili, radiator | Service part / kit | PartsGeek | |
| 259595 | Adapter, oil drain | Service part / kit | PartsGeek | |
| 259640 | Flywheel | Service part / kit | PartsGeek | |
| 259642 | Panel, rear | Service part / kit | PartsGeek | |
| 259652 | Shroud, radiator | Service part / kit | PartsGeek | |
| 259653 | Cover, radiator shroud | Service part / kit | PartsGeek | |
| 259675 | Shroud, radiator RS | Service part / kit | PartsGeek | |
| 259680 | Bracket, solenoid | Service part / kit | PartsGeek | |
| 259714 | Bracket, housing | Service part / kit | PartsGeek | |
| 259718 | Support, housing (RH) | Service part / kit | PartsGeek | |
| 259719 | Support, housing (LH) | Service part / kit | PartsGeek | |
| 259721 | Rail, corner (LH) | Service part / kit | PartsGeek | |
| 259722 | Rail, corner (RH) | Service part / kit | PartsGeek | |
| 259724 | Stiffener | Service part / kit | PartsGeek | |
| 259727 | Door | Service part / kit | PartsGeek | |
| 259731 | Rail, end | Service part / kit | PartsGeek | |
| 259732 | Latch, handle | Service part / kit | PartsGeek | |
| 259733 | Rail, side | Service part / kit | PartsGeek | |
| 259735 | Support, radiator | Service part / kit | PartsGeek | |
| 259736 | Support, radiator | Service part / kit | PartsGeek | |
| 259748 | Roof | Service part / kit | PartsGeek | |
| 259757 | Bracket, housing | Service part / kit | PartsGeek | |
| 259758 | Support, housing (RH) | Service part / kit | PartsGeek | |
| 259759 | Support, housing (LH) | Service part / kit | PartsGeek | |
| 259764 | Tubing, formed water | Service part / kit | PartsGeek | |
| 259768 | Flange, exhaust | Service part / kit | PartsGeek | |
| 259770 | Bracket, support | Service part / kit | PartsGeek | |
| 259771 | Bracket, valve support | Service part / kit | PartsGeek | |
| 259780 | Bracket, actuator (linear) | Service part / kit | PartsGeek | |
| 259793 | 10RMOY | Service part / kit | PartsGeek | |
| 259803 | Stator (600 volt) (22.5RZ, A-269487 Rotor (22.5ROZ, 24ROZ) | Service part / kit | PartsGeek | |
| 259804 | Stator (600 volt) (32.5RZ, models) | Service part / kit | PartsGeek | |
| 259811 | Bracket, pipe | Service part / kit | PartsGeek | |
| 259812 | Bracket, water regulator | Service part / kit | PartsGeek | |
| 259879 | Bracket, heat exchanger | Service part / kit | PartsGeek | |
| 259890 | Latch, door | Service part / kit | PartsGeek | |
| 259919 | Mount, vibro (all models panel assembly B-269984) | Service part / kit | PartsGeek | |
| 259930 | Stator, standard (all models) | Service part / kit | PartsGeek | |
| 259991 | Support, housing (LH) | Service part / kit | PartsGeek | |
| 267548 | Block, oil | Service part / kit | PartsGeek | |
| 268310 | Bulb, light (15) | Service part / kit | PartsGeek | |
| 268564 | Horn, warning | Service part / kit | PartsGeek | |
| 269238 | Bracket, end (15ROY) | Service part / kit | PartsGeek | |
| 269239 | Adapter, generator (15ROY) | Service part / kit | PartsGeek | |
| 269240 | 15ROY | Service part / kit | PartsGeek | |
| 269241 | Panel, louver (all models) | Service part / kit | PartsGeek | |
| 269303 | Panel, right side (15ROY) | Service part / kit | PartsGeek | |
| 269306 | Plate, closure (2) (15ROY) | Service part / kit | PartsGeek | |
| 269312 | Skid | Service part / kit | PartsGeek | |
| 269369 | 22.5RZ, 22.5ROZ, 24ROZ, 269987 Panel, front | Service part / kit | PartsGeek | |
| 269383 | Wiring harness 4 (NFPA - tion 10422a) | Service part / kit | PartsGeek | |
| 269384 | Box, meter | Service part / kit | PartsGeek | |
| 269385 | Tray, upper uniboard | Service part / kit | PartsGeek | |
| 269386 | Meter box cover | Service part / kit | PartsGeek | |
| 269398 | Relay (2CR) | Service part / kit | PartsGeek | |
| 269417 | Bolt-J (4) (all models) | Service part / kit | PartsGeek | |
| 269433 | Stator (standard) (32.5RZ, A-259445 Rotor (47.5ROZ) | Service part / kit | PartsGeek | |
| 269437 | Bracket, end (all models) | Service part / kit | PartsGeek | |
| 269438 | Adapter, generator (all 258358 Stator (standard) (47.5ROZ) | Service part / kit | PartsGeek | |
| 269492 | Panel, left side (15ROY) | Service part / kit | PartsGeek | |
| 269949 | Wiring harness 5 (NFPA 259696 22.5RZ | Service part / kit | PartsGeek | |
| 269985 | 15ROY, 17.5ROY, 15RMOY, 17.5ROY | Service part / kit | PartsGeek | |
| 269994 | Rack, battery | Service part / kit | PartsGeek | |
| 271097 | Joint, ball | Service part / kit | PartsGeek |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
Available documents
Parts manual — g260412 (Kohler)Parts manual — tp5073 (Kohler)Parts manual — tt650 (Kohler)Service manual — R Series Service TP5074 (Kohler)Service manual — TP5074 Kohler Gen Service RMY ROY ROZ RMOY (12-1988) (Kohler)Service manual — TP5110 Kohler Gen Service 5RMY 7RMY 10RY 15RMOY (02-1990) (Kohler)Service manual — tp5074 (Kohler)Service manual — tp5110 (Kohler)