Easy
15-30 minutes
This is an authentic manufacturer-sourced part that is specially designed for use with Honda engines commonly installed on lawn and garden equipment. It is an identical replacement for a faulty or a damaged tappet adjusting screw that was installed on a new unit. The purpose of this item is to secure a valve rocker arm, please make sure to refer to the appropriate diagrams of your model for the correct location and application of this hardware. Keep in mind this high-quality part is made of durable metal and is sold individually.
Screw- Tappet Adjusting 90012-333-000
OEM part for: Honda, Toro, Lawn Boy, Honda Marine
Part Number: 90012-333-000
$3.99
In Stock
Ships within 1 business day 
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Compatibility
This Screw- Tappet Adjusting will fit the following 1377 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Honda
Toro
Lawn Boy
Honda Marine
Show More Compatible ModelsThis item works with the following types of products:
- Engine Parts
- Lawn Mower Parts
- Lawn Tractor Parts
- Scooter Parts
- Snowblower Parts
- Generator Parts
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
tappet and nut stripped out..
LeGrand - September 30, 2023
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Wrench Set, feeler gauge
very easy replacement
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exhaust valve rocker arm was broken
Charles - December 28, 2022
Tool Type
Engine
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Wrench Set, feeler gauge
Honda 5hp engine . took off valve cover , pulled pin holding rocker arm on took off old rocker arm, picked piece that broke off , put new rocker arm in place installed keeper pin , adjusted valve clearance , put sealant on valve cover tightened bolts, started engine . Runs great !
fit perfect , great price . very pleased
fit perfect , great price . very pleased
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cracked rocker arm on exhaust valve -- common problem on Honda GCV190 engines
Paul - May 15, 2021
Tool Type
Engine
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Wrench Set, feeler gage
removed spark plug
removed valve cover
rotated engine to Top Dead Center (TDC)
pulled rocker arm pin (easy) and removed rocker arm
Installed tappet screw and nut on new rocker arm
Installed rocker arm and pin
set gap by adjusting tappet screw and nut (.08 inch for my engine)
checked gap on intake valve (it was fine)
Installed valve cover and spark plug
Easy, peasy
removed valve cover
rotated engine to Top Dead Center (TDC)
pulled rocker arm pin (easy) and removed rocker arm
Installed tappet screw and nut on new rocker arm
Installed rocker arm and pin
set gap by adjusting tappet screw and nut (.08 inch for my engine)
checked gap on intake valve (it was fine)
Installed valve cover and spark plug
Easy, peasy
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Tappet cracked
Daniel - July 30, 2019
Tool Type
Engine
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Feeler gauge
I had slip the adjusting bolt o and put the nut to hold it on to the tappet. I slid the pin in place to hold the tappet. Turn the engine to get the piston on top and set the tappet to correct gap. Tighten bolt and put the head cover in place.
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Valve rocker broke.
james - April 5, 2018
👍 0 of 1 people found this instruction helpful
Tool Type
Engine
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Feeler guage
1. Removed the valve cover.
2. Removed the old broken rocker.
3. Installed the new rocker, the adjustment bolt, and the lock nut.
4. Adjusted the valves and reinstalled the valve cover.
2. Removed the old broken rocker.
3. Installed the new rocker, the adjustment bolt, and the lock nut.
4. Adjusted the valves and reinstalled the valve cover.
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
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