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Onan Parts



Page: 1

All Onan Parts


We have any part for any Onan 6.5 gas MCCK -- If you do not see the part you need please call or text to number below. Bob Cushman -- 609 713 4602

Onan 6.5 Marine Generator -- Complete Rebuild


** Price Reduction **

Onan 6.5 marine generator – Completely rebuilt. This was the generator most commonly installed by Trojan on their F-boat and International models. We believe it is one of the best marine generators ever made. This marine Onan generator comes with a heat exchanger for freshwater cooling. ** Generator comes with a one year warranty **

New intake valves, new fuel lines, new gaskets, new spark plugs, all new wiring in the control box and in the tail end, new condenser, new 316 stainless bolts used for reassembly, new relays and resistors.

Oil pan has been removed and all bearings have been checked. All new gaskets, new Onan carburetor, new electric choke, new bolts and nuts.

Starts on first push and puts out 120/240 volts. New Thermoid high temperature hoses, new impeller in the raw water pump and new fresh water pump. New spark plugs, new points, new condenser, new high temperature switch on exhaust, new exhaust elbow and new fuel pump.

6.5 kW @ 1800 RPM -- Single Phase -- 12V Battery -- 120/240V

Price: $4300.00 Generator, heat exchanger and shroud plus shipping

Price: $4150.00 Generator, heat exchanger plus shipping (no shroud)

Price: $3850.00 Generator plus shipping (no heat exchanger, no shroud)


Onan Fuse Holder -- 38.49


Onan Fuse Holder
Onan part# TRJ0321-0175

Onan Genset Engine Service Manual -- 10.00


Onan Service Manual
927-0752 Onan Service Manual MCCK RCCK Engine Service manual
Product is a scanned, downloadable version of the original manual. Note: We can get ANY Onan Part. Call Bob -- 609-713-4602

Raw Water Pump -- 619.00


Raw Water Pump -- TRJ131-0257 -- Send us your Onan pump and we we’ll rebuild it with new seals, bearing, shaft, impeller. Each pump is tested before sending it back to you. Call with any questions... 609-713-4602


Nikki Carburetor Rebuild Kit -- 179.72


Nikki Carburetor Rebuild Kit -- Onan TRJ146-0356 -- Note: the carb name is printed on the carb

Onan Carburetor Kit -- Walbro -- 225.00


Onan Carburetor Kit -- Walbro -- Part # TRJ146-0292 -- ONE available

Onan Decals -- 58.50


Onan Decals -- Three decals -- one Engine Cover decal, one "Control Panel" decal, one "No Step" decal -- FREE SHIPPING


Onan Governor Spring -- 58.76


Onan Governor Spring -- TRJ159-1612 -- Only ONE Available

Onan Impeller -- 68.95


Onan Impeller (#TRJ131-0160) -- Fits MCCK early models A through G -- This is a high quality impeller not a substandard product that might be found on Ebay. Comes with a gasket.



Page: 2

Onan Impeller -- 68.52


Onan Impeller -- Part #TRJ131-0386
This is a direct replacement. The original Onan impeller is no longer available. Comes with the gasket. This is a high quality impeller not a substandard product that might be found on Ebay.


Onan Breather Tube -- 72.92


Onan Breather Tube -- Breather tube to carburetor -- NEW -- ONE Available

Onan Carb Rebuild Kit


Zenith side-draft Onan carburetor rebuild kit
Part # TRJ0141-0747 ** Only ONE Available ** Price 137.09

Onan Carburetor -- 534.00


MCCK Carburetor new in box -- Comes with both installation gaskets


Onan Fuel Pump -- 158.00


Replacement Fuel Pump for Onan Generator -- Replaces MCCK electric fuel pump -- Part #149-1828 -- We suggest staying away from the cheaper, less expensive pumps found on eBay as they are very low quality and last just a short time.

Onan Fuel Pump -- Rebuilt -- 169.76


Onan Fuel Pump -- Rebuilt -- Onan fuel pump 149-1784 149-1791 149-1223 149-1213 149-1393

Onan Fuel Pump Rebuild Kit -- 120.00


Onan Fuel Pump Rebuild Kit -- Part# 149-0526 -- For fuel pump 149-1784 149-1791 149-1223 149-1213 149-1393


Breaker Points Set -- 53.08


Breaker Points Set
Part # ON-TRJ160-0002

Bronze Seacock -- Full Flow -- 248.00


Bronze Seacock -- Full Flow -- 3/4" with extra long bronze thru hull, round bronze out side strainer, backing plate and all hardware for installation. Only ONE Available.



Page: 3

Choke Element -- 65.19


Choke Element
Part # ON-TRJ153-0017

Circulating Pump - NEW -- 589.55


Circulating Pump -- Onan MCCK 6.5 -- Circulating pump for closed system -- Oberdorfer 50-15 -- NEW -- Part# TRJ132-0110

Circulating Pump - Rebuilt -- 394.13


Circulating Pump -- Onan MCCK 6.5 -- Circulating pump for closed system -- Rebuilt -- Part# 132-0110 -- Oberdorfer 50-15

Circulating Pump - Used, Tested -- 235.78


Circulating Pump - Used, Tested -- Onan MCCK 6.5 -- Circulating pump for closed system -- Oberdorfer 50-15 -- Part# TRJ132-0110

Exchanger Cap -- 20.22


Exchanger Cap -- for closed system cooling

Generator Hose Barb -- 1.5" -- 120.30


Generator Hose Barb -- 1.5" -- Bronze thru hull for Onan generator exhaust discharge. Only ONE Available.

Intake / Exhaust Gasket -- 23.82


Onan Intake/Exhaust Gasket -- MCCK - Part #TRJ145-2769 - Sold as a pair -- THREE pairs available

Onan Carburetor Gasket -- 14.72


Onan Carburetor Gasket -- TRJ140-0921

Onan Carburetor Gasket -- 23.61


Onan Carburetor Gasket -- Part # TRJ146-0220 -- ONE Available


Onan Charging Diode -- 44.52


Onan Charging Diode -- This charging diode is only used on the MCCK model that has an electric starter, vertical carburetor and round flame arrester. The charging diode generally is damaged if a battery charger is hooked up to the Onan when running. The Onan charges it’s battery at about 13 volts. The amperage output is one to three amps.




Page: 4

Onan Condenser -- 55.55


Onan Condenser
Part # ON-TRJ312-0069 -- Only ONE Available -- Difficult to locate

Onan Cover Gasket -- 15.27


Onan Cover Gasket -- Part# TRJ132-0112

Onan Exhaust Elbow -- 850.10


Onan Exhaust Elbow -- Part # 155-1058 -- This is a replacement exhaust elbow fit all Onan MCCK 6.5 marine generators -- Discharge hose is 2" -- Comes with high temp switch and all connections -- Only ONE Available

Replaces this exhaust elbow


Onan Exhaust Manifold -- 1,195.00


Onan Exhaust Manifold -- Part# 154-2092 Or Part#154-0983 -- exhaust manifold for all ONAN MCCK Marine generators -- New -- One Available


Onan Exhaust Temp Switch -- 122.43


Onan Exhaust Temp Switch -- Part # TRJ309-0420


Onan Fixed Resistor -- 44.98


Onan Fixed Resistor For MCCK/MCCKA

Onan Generator Spark Plugs -- 61.38


Onan Generator Spark Plugs
Spark plugs for Onan generators

Onan Heat Exchanger -- NEW -- 398.27


Onan Heat Exchanger -- NEW -- Part # TRJ130-1394

Onan Heat Exchanger -- Used -- 289.13


Onan Heat Exchanger -- Used -- TRJ130-1394 -- ONE Available -- This used exchanger has been tested and certified to be in perfect condition.

Onan Hour Meter -- 62.20


Onan Hour Meter




Page: 5

Onan MCCK Brushes -- 19.61


Onan MCCK Brushes -- For MCCK 6.5 -- Part # TRJ214-0096 -- TWO available

Onan Oil Pan Base Gasket -- 13.50


Onan Oil Pan Base Gasket -- Fits all MCCK generators -- TRJ0102-1369 -- ONE Available

Onan Oil Pressure Switch -- 42.89


Onan Oil Pressure Switch
Normally open - with oil pressure switch is closed. Replaces original Oil Pressure switch MCCK

Onan On/Off Rocker Switch -- 49.10


Onan On/Off Rocker Switch

Onan Points Plunger -- 12.72


Onan Points Plunger -- MCCK Points Plunger -- Part # TRJ160-0265 -- ONE Available

Onan Raw Water Pump Pully - Used -- 110.00


Onan Raw Water Pump Pully - Used -- Part # TRJ512-0071 -- ONE Available

Onan Rectifier Bridge -- 52.21


Onan Rectifier Bridge -- Common cause of a running Onan to stop and not start again.

Onan Regulator -- (Used, Tested) -- 85.00


Onan Regulator -- (Used, Tested) -- Onan 305-0383 TCA-4004 -- Only ONE Available


Onan Relay -- Crank / Stop / Run -- 26.30


Onan Relay -- Crank / Stop / Run -- There are three relays that are all the same on the Onan MCCK with electrical box like picture. One relay is at top of box. One relay is under start stop switch. One relay is under the fuses. From experience. it's generally best to replace all 3 relays.

Onan Resistor -- 45.47


Onan Resistor -- There are two (one on each side) above generator brush holders -- Only TWO Available



Page: 6

Onan Shielded Cable Spring Kit -- 38.00


Onan Shielded Cable Spring Kit
Spring assembly to repair the shielded Onan plug wire.

Onan Shielded Spark Plug Wire - Used -- 465.61


Onan Shielded Spark Plug Wire -- Used, Tested -- TRJ167-1631 -- 25 inch length -- ONE Available

Onan Shielded Spark Plug Wire - Used -- 375.65


Onan Shielded Spark Plug Wire - Used -- 10 inched in length -- Part # TRJ 167-1632 -- ONE Available


Onan Shielded Spark Plug Wire - Used -- 197.12


Onan Shielded Spark Plug Wire - Used -- Part # TRJ167-1485 -- 5 1/2 inches in length -- Right side Onan MCCK 4K and 6.5K with side draft carburetor. No electric starter like an automobile.

Onan Shielded Spark Plug Wire - Used -- 243.93


Onan Shielded Spark Plug Wire - Used, tested -- Part # TRJ167-1480 -- 16 inches in length -- Onan MCCK 4K, 6.5K with side draft carburetor and No electric starter like an automotive.

Onan Shore / Gen Switch -- 605.24


Onan Shore / Gen Switch -- C42 A222 65 amp -- Trojan direct replacement for Onan 6.5 MCCK


Onan Start Solenoid -- 47.09


Onan Start Solenoid

Onan Starter - Rebuilt -- 275.00


Onan Starter - Rebuilt -- Quality rebuilt starter -- TRJ191-1246 -- For MCCK gas 6.5

Onan Starter -- NEW -- 385.00


Onan Starter -- NEW -- TRJ191-1246 -- For MCCK 6.5 -- New starter, Not remanufactured

Onan Temperature Switch -- 110.67


Onan Temperature Switch
New switch -- this part is no longer available. #309-TRJ0257 ** Only ONE Available



Page: 7

Onan Thermostat Gasket -- 11.58


Onan Thermostat Gasket -- Part # TRJ0309-0186 -- SEVEN available

Groco Strainer -- 65.00


Groco Strainer -- Groco WSP-750-P -- 3/4" inlet and 1/2" outlet

Onan Circulation Pump Exchanger Belt -- 39.81


Onan Circulation Pump Exchanger Belt -- Onan belt for exchanger circulation pump and the raw water pump. This belt is for the Onan MCCK 6.5 with a heat exchanger.

Onan Remote Start Cover Switch -- 36.71


Onan Remote Start Cover Switch -- Have TWO Only

Onan Remote Start Switch -- 47.36


Onan Remote Start Switch -- Only ONE Available

Carb-to-Flange Gasket -- 8.86


Onan Carburetor to Flange gasket -- TRJ1410281 // TRJ1410858 ** Only ONE available **

Carb-to-Manifold Gasket -- 9.75


Onan - Carburetor to Manifold gasket - TRJ141-0859 ** Only ONE Available **

Exhaust Manifold Gasket -- 7.00


Exhaust Manifold Gasket -- TRJ154-2765

Onan Head Gasket -- 59.78


Onan head gasket
MCCK 6.5 Head Gasket -- Part #TRJ0110-3611

Onan Raw Water Pump Belt -- 39.74


Onan Raw Water Pump Belt -- Raw water pump belt fits Onan MCCK 4.0 and 6.5 without heat exchanger. Onan TRJ0511-0073



Page: 8

Onan Raw Water Seal Kit -- 196.50


Onan Raw Water Seal Kit TRJ131-0220 -- Onan seal kit for Onan raw water pump 131-0257 -- Comes with: -- Seal (#10 below) -- Retaining Ring (#7 below) -- and Slinger (#3 below)


Onan Water Pump Gasket -- 4.60


Raw Water Pump Gasket
Part # TRJ131-0161 - Used on raw water pump MCCK - Late 1960's thru early 1970's

Onan Water Pump Gasket -- 4.73


Raw Water Pump Gasket
Part # TRJ131-0210 - Used with impeller TRJ131-0386

Valve Box Gasket -- 8.35


Valve Box Gasket
Onan - Part #TRJ0110-3606

Onan Raw Water Pump -- 185.61


Onan Raw Water Pump (for later Onan's)
This is made by the company that made it for Onan
A line of compact, magnetic driven, centrifugal pumps which combine high flow rates with very low electric current consumption. Suitable for fresh water, ethylene glycol and salt water circulation. PPA thermoplastic pump body with PPS thermoplastic impeller. EPDM O-ring, stainless steel shaft, PSU magnet housing, enclosed DC permanent magnet, ball bearing mounted motor designed for continuous operation. Hose Connection: 5/8" -- Dimensions: 6.97" L x 2.68" W x 3.35" H -- Capacity: 4GPM at 3.3'.)

Original Onan Shore/Gen Switch -- 180.00


Original Onan Shore/Gen switch
65 Amp 3 pole switch - Shore/Off/Gen - Switch comes with external mount housing - Excellent Condition -- No longer made

Raw Water Pump Wear Plate -- 23.88


Raw Water Pump Wear Plate
Onan TRJ131-0217

Onan Thermostat -- 89.88


Onan Thermostat -- Onan TRJ309-0130 - Fits all MCCK models H though J




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