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Model #1812 & #1813
Rod/Jet Reference Chart
Ref# Main Jet Metering Rod
1 0.113(.22606) .068 x .047
(.17272 x .11938)
2 0.113(.22606) .068 x .042
(.17272 x .10668)
3 0.116(.29464) .073 x .042
(.18542 x .10668)
4 0.113(.22606) .068 x .052
(.17272 x .13208)
5 0.113(.22606) .068 x .057
(.17272 x .14478)
6 0.113(.22606) .065 x .037
(.1651 x .09398)
7 0.113(.22606) .065 x .042
(.1651 x .10668)
8 0.113(.22606) .065 x .047
(.1651 x .11938)
9 0.116(.29464) .070 x .057
(.1778 x .14478)
10 0.113(.22606) .065 x .057
(.1651 x .14478)
11 0.113(.22606) .063 x .037
(.16002 x ..09398)
12 0.113(.22606) .063 x .047
(.16002 x .11938)
13 0.116(.29464) .068 x .057
(.17272 x .14478)
14 0.116(.29464) .067 x .049
(.17018 x .12446)
15 0.116(.29464) .065 x .042
(.1651 x .10668)
16 0.116(.29464) .065 x .057
(.1651 x .14478)
17 0.113(.22606) .070 x .037
(.1778 x .09398)
18 0.113(.22606) .070 x .042
(.1778 x .10668)
19 0.113(.22606) .070 x .047
(.1778 x .11938)
20 0.113(.22606) .070 x .052
(.1778 x .13208)
21 0.113(.22606) .070 x .057
(.1778 x .14478)
22 0.110(.2794) .067 x .049
(.17018 x .12446)
23 0.107(.27178) .063 x .037
(.16002 x .09398)
24 0.113(.22606) .073 x .047
(.18542 x .11938)
25 0.113(.22606) .073 x .042
(.18542 x .10668)
26 0.113(.22606) .073 x .037
(.18542 x .09398)
#1812 / #1813 Calibration Reference Chart / Primary Metering
Stock Calibration
Numbers in white are the steps obtainable using jet and rod combinations
shown on the following page.
Step 1 Select the combination of Cruise Mode and Power Mode fuel-metering stages desired
for your calibration. Normal calibration changes will be within the gridded diagonal
area. That is, Cruise and Power mode changes should be in the same direction (either
richer or leaner) and usually by the same amount.
Step 2 Find the number that is nearest your desired combination. This is your Calibration
Reference Number.
Step 3 Go to the next page. Find the Calibration Reference Number you have just selected in
Step 2. Listed will be the Main Jet and Metering Rod required to achieve the desired
fuel metering for the Primaries.