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Bi-Fuel (LP Gas and Natural Gas) Yamaha EF1000iS Inverter Generator

Yamaha Generators  EF1000iS

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Bi-Fuel (LP Gas and Natural Gas) Yamaha EF1000iS Super Quiet Inverter Generator - New, innovative bi-fuel system allows operation on clean burning LP Gas and Natural Gas right out of the box. No mechanical alterations are necessary - simply change your fuel source.

Simply connect to any lp gas supply (even a barbeque grill tank!) or natural gas supply, push the primer on back of the regulator and pull the rope.

This Bi-Fuel EF1000iS features an all-new ergonomic style fitted with a compact alternator and inverter unit and weighs in at a class-leading 27lbs! This unit features the revolutionary Yamaha MZ50 engine that automatically adjusts engine speed to precisely match load, a sound level of only 47 dB(A), Oil Watch oil warning system and an 85 hour run time on a 20 lb grill-type tank! DOES NOT INCLUDE LP HOSE & TANK.


Model Number 07703
Electrical Specifications -
Power Single-Phase ---
Maximum Output 1,000 watts
Continous Output 900 watts
Load Amperage at 120 volts ---
Maximum Load 8.33 Amps
Continous Load 7.5 Amps
Sound Level @ 23 ft(7 m) at half load 47 dB(A)

Model Number 07703
Engine -
Type Yamaha OHV MZ50
Power 2.2 HP
Displacement 50 cc
Oil Capacity Approx. 1.2 Qts
Low Oil Pressure Shutdown Standard
Cylinder Block Aluminum w/ Cast Iron Sleeve
Exhaust Outlet 3/4" OD Muffler Outlet
Cooling System Air-cooled
Fuel LP Gas & Natural Gas
Starting System Recoil

Model Number 07703
On LP Gas -
Consumption at 1/2 load 0.055 gallons/hour
Consumption at 3/4 load 0.089 gallons/hour
Consumption at full load load 0.139 gallons/hour
Run time on 20 lb grill-type tank 85 hours
On Natural Gas -
Consumption at 1/2 load .007 cu.ft./hr
Consumption at 3/4 load .012 cu.ft./hr
Consumption at full load load .018 cu.ft./hr

Model Number 07703
Receptacles -
A. 120 VAC Duplex NEMA#L5-20R 1-20 Amp
B. 12 VDC Outlet 1-8 Amp
C. 120 VAC Duplex NEMA#L5-20R 1-20 Amp
D. Overload Indicator Standard
E. AC Power Indicator Standard
F. Low Oil Indicator Standard
G. DC Overload Protector Standard
H. Economy Idle Control Standard
I. On/Off Switch Standard
J. Choke Standard
K. Fuel Shutoff Valve Standard
L. Ground Connection Standard

Model Number 07703
Installation Specifications -
Fuel Inlet Fitting Size 3/4" FNPT
Recommended Fuel Hose Size 3/8"
Fuel Inlet Pressure Natural Gas: 5-7" Water Column
Propane: 11-14" Water Column
Exhaust Outlet 3/4" OD Muffler Outlet
Exhaust Direction (Facing Control Panel) Right-Side
Service Points
(Facing Control Panel)
Oil Fill: Back-Side
Air Filter: Back-Side
Spark Plug: Back-Side
Power Output Panel: Front-Side
Fuel Regulator: Back-Side
Minimum Cord Size 0-50 Feet: 10 AWG
51-100 Feet: 8 AWG
101-150 Feet: 6 AWG
Engine Oil Type 10W-30 Synthetic

Model Number 07703
Warranty -
Engine Warranty 2 Year
Generator Warranty 2 Year
100% Coverage for Parts & Labor Standard

Model Number 07703
Dimensions -
Length 17.6 inches
Width 9.4 inches
Height 14.9 inches
Dry weight 27.9 lbs

Manufacturer's suggested retail price... $1379


E-Mail Address:  

Central Maine Diesel
29 Carey Circle
Hampden, ME 04444

Phone: 1-207-941-1188
Fax: 1-207-941-1189

Copyright 2016 Central Maine Diesel Inc. All rights reserved.