Generac Power Systems GTH990 User Manual

3-1
CARBURETOR TYPES
All Generac gasoline powered OHVI V-Twin engines utilize a
two-barrel type carburetor. Some LP engines use a single barrel
carburetor.
CARBURETOR REMOVAL - VERTICAL SHAFT
1. Unclip choke link from bellcrank and remove link from
carburetor.
2. Disconnect fuel-shutoff solenoid by unplugging the power wire.
3. Disconnect breather tube and EVAP hose if equipped.
4. Separate throttle link balljoint from carburetor by rotating the ball
socket.
5. Disconnect the fuel line clamp and the fuel line.
SPEED
CONTROL
LEVER
SLOW
CLIP
BELL CRANK
CHOKE
LINK
HIGH
BREATHER
Figure 3-1. Vertical Shaft Carburetor
Figure 3-2. Vertical Shaft Carburetor
6. Remove the four nuts holding the carburetor and plenum to the
intake manifold (see Figure 3-6).
7. Remove the plenum, carburetor and gaskets from the manifold
and discard the gaskets.
CARBURETOR REMOVAL – HORIZONTAL SHAFT
1. Remove air cleaner cover and air cleaner.
2. Unthread yellow plastic knob from Summer/Winter intake control
(if equipped)
3. Remove dipstick tube hold down bolt and remove tube assembly
(see Figure 3-3).
4. Remove the four nuts and one bolt that retains the air cleaner base,
breather tube and EVAP hose if equipped; remove base (see Figure
3-3).
5. Remove fuel line clamp and fuel line from top of carburetor.
4 NUTS
DIPSTICK TUBE &
HOLD DOWN
BOLT
Figure 3-3. Horizontal Shaft Carburetor
THROTTLE
LINK
Figure 3-4. Horizontal Shaft Carburetor
SECTION 3: CARBURETION AND FUEL SYSTEM
3

Generac Power Systems GTH990 Specifications

General

Brand	Generac Power Systems
Model	GTH990
Category	Engine
Language	English