Rochester Monojet Carburetor

The 1MV monojet carburetor is a single down draft unit using a triple ventuir in conjunction with the plain tube nozzle. The main venturi is 1 7/32″ in diameter and the throttle bore is 1 7/16″.
Fuel flow through the main metering system is controlled by a main well air bleed and a fixed orifice jet. A venturi velocity power enrichment system is used to provide good performance during moderate to heavy acceleration and at higher engine speeds.
An exhaust gas recirculation, E.G.R. system controls oxides of nitrogen emissions. The E.G.R. valve is operated by a vacuum signal taken from the carburetor throttle body.
A vacuum supply tube installed in the carburetor throttle body connects by a passage to timed vertical ports located in the bore of the throttle body and float bowl. The ports provide a vacuum signal to the E.G.R. valve in the off idle and part throttle operation of the carburetor.
The E.G.R. valve, mounted on the intake manifold, circulates a metered amount of exhaust gases to the combustion mixtures to lower peak combustion temperatures, thereby reducing oxides of nitrogen during these ranges of engine operation.

The E.G.R. system is not in operation during the engine idle.

A pleated internal paper fuel inlet filter is mounted in the float bowl behind the fuel inlet nut to give maximum filtration of incoming fuel.

The carburetor has an aluminum throttle body, a thick throttle body to bowl insulator gasket, and a internally balanced venting through a vent hole in the air horn which leads into the bore beneath the air cleaner. The float bowl is externally vented under extreme conditions through a pressure relief valve system.

The carburetor part number is stamped on vertical section of float bowl, next to fuel inlet.

An idle stop solenoid is used to control idle. The solenoid is electrically  controlled through the ignition switch. When the ignition switch is tunred off, the solenoid is denergized, allowing the carburetor throttle valve to close further, preventing the engine from running after the ignition switch is turned off. On manual transmission models, the  solenoid also deenergizes when the clutch is disengaged.

Rochester Monojet Identification

Monojet Identification

1980 Monojet 1ME Exploded View & Parts List

1981-85 Monojet 1ME Exploded View & Parts List

1985 & Later Monojet 1MEF Exploded View & Parts List

Float Level Adjustment

Monojet Float Level

Fast Idle Cam Adjustment

Monojet Carburetor

Vacuum Break Adjustment

Monojet Carburetor

Choke Coil Lever Adjustment
Quadrajet Adjustment

Trouble Shooting the Monojet M MV Carburetor

Adjust the Idle Mixture


http://www.mikesfuel.com/Subaru-Fuel-Injection-Parts_c_96.html

Recent Posts

Subaru Class Action

A lawsuit has been filed in the United States District Court in New Jersey against Subaru of America, Inc. (“Subaru”) and Fuji Heavy Industries, Ltd.

What is the suit about?

The suit alleges that certain Subaru vehicles suffer from a design defect that causes them to consume excessive amounts of engine oil. The lawsuit seeks class action certification for people who currently own and lease the affected vehicles, as well as for people who previously purchased or leased the affected vehicles. The suit alleges that Subaru violated certain consumer statutes and breached certain warranties to its customers.




Subaru denies the suit’s claims, maintaining that it has not violated any warranties, statutes or laws, and maintains that the vehicles in question are not defective.

What remedies are available?

Unless they exclude themselves from the class action settlement by June 13, 2016, eligible Subaru purchasers/lessees are eligible for the following remedies if the court approves the proposed settlement:

  • Cash reimbursements for expenses not previously reimbursed for vehicle oil consumption tests;
  • Cash reimbursement for expenses not previously reimbursed for vehicle repairs to address oil consumption;
  • Cash reimbursement for certain engine oil purchases, to the extent not previously reimbursed;
  • Extended Power train Limited Warranty to cover authorized repairs to correct excess oil consumption (up to the earlier of 8 years or 100,000 miles);
  • Cash reimbursement for rental car expenses and towing fees for the period of time the vehicle was being serviced for excess oil consumption.

What vehicles are involved?

Remedies are only available for people who bought or leased one of the following vehicles within the continental United States (including Alaska):

http://www.mikesfuel.com/Subaru-Fuel-Injection-Parts_c_96.html
Automatic/CVT Transmission Manual Transmission
2011-2014 Forester (below VIN *529004) 2011-2015 Forester (below VIN *543624)
2012-2013 Impreza 4-door (below VIN *033336) 2012-2015 Impreza (below VIN *270253)
2012-2013 Impreza 5-door wagon (below VIN *886714) 2013-2015 Crosstrek (below VIN *2702874)
2013 Crosstrek (below VIN *856139) 2013-2014 Legacy (all)
2013 Legacy (below VIN *048086) 2013-2014 Outback (all)
2013 Outback (below VIN *321435)

For more information, including the proposed settlement agreement, the claim form, important dates, and answers to frequently asked questions, visit the lawsuit settlement page at http://www.oilconsumption.settlementclass.com/index.html.



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