Genuine OEM replacement primer bulb for engines with a pulsa prime carburetor. This part is sold individually. It includes the Rubber Bulb and the Plastic Collar to attach it. A primer sends gas into the carburetor so it can create a fuel and air mixture that is ready to go right into the cylinder and keep the engine running. Over time a primer bulb can dry out and crack. If the bulb is damaged it will not create suction and will not function as needed, therefore it will need to be replaced.
Primer-carburetor 694394
OEM part for: Briggs & Stratton, Briggs & Stratton Engines
Part Number: 694394
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Compatibility
This Primer-carburetor will fit the following 2851 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Briggs & Stratton Engines
Show More Compatible ModelsThis item works with the following types of products:
- Engine Parts
This part replaces obsolete part #: 691347, 494408
Repair Videos ?
Replacing primer bulbs in small engines is one of the most common types of tool repairs, and this article explains profe...
June 25, 2010
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Customer Part Reviews ?
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Does this fit my product?Questions & Answers for Primer-carburetor
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.
Dirty air filter and worn out Primer Bulb
Tool Type
Lawn Mower
Difficulty
Hard
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Pliers that have tips bent in
To remove old primer bulb use pliers that have tips bent in. Put bent in tips in bulb housing cuts (vertical) that show white on the housing closer to the carburetor and squeeze in with gentle pulling pressure. The bulb and retainer (white nylon) should be able to be worked out of the housing. Put the new retainer on the new bulb and push into the housing using a flat screwdriver making sure the flaps on the retainer line up with the cuts in the housing. Rotate the screwdriver around the retainer gently pushing each time until the retainer flaps engage the housing cuts.
Black smoke, broken primer bulb.
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers, Socket set, Adjustable Wrench, WD40
primer bulb had melted during prolonged storage
Tool Type
Engine
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Parts Used
2. Retainer clip/ring impossible to remove from engine without destroying it
3. Replaced new primer bulb
4. New clip/ring very difficult to insert
5. Several tries with screwdriver which could have easily punctured primer bulb
6. Finally clicked into place
7. Primer works well & engine starts
Had a hole in it
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Pliers, Socket set
Parts Used
Primer
Tool Type
Engine
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, small screwdriver
Parts Used
Primer bulb on carburetor splut after 20 years
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
Cleaned out area of corrosion and dirt
Installed new bulb
Cleaned air filter
Primed carb
Pulled starter cord
Motor started like always
Mowed lawn
Abandoned mower, missing a wheel, sitting at the curb waiting to go to the junk yard
Tool Type
Lawn Mower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set
Step 1 Power wash and engine degreaser.
Step 2 Inspect for oil - it was almost dry. Checked for spark - good. Air filter has never been changed. Primer bulb shot. Got it to start eventually - stable enough.
Step 3 Tore down the engine cover and carburetor enough to figure only that the only service this thing has seen is gasoline. Ordered the above parts.
Step 4 Cleaned out the carburetor and the top end of the engine. Sharpened the blade and made sure the whole mower was structurally sound.
Step 5 Replaced the parts that were ordered including the missing wheel assembly. Changed the oil, fresh gas, Three primes of the primer bulb. the machine came to life on the 1st pull.
I have mowed my grass three times so far, runs great. Selling it to a friend who needs a cheap mower
Primer bulb had a hole in it
Tool Type
Engine
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers, Adjustable Wrench, None
Parts Used
primer bulb
Tool Type
Engine
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, small hammer
Parts Used
Governor spring broke
Tool Type
Lawn Mower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Nutdriver
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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.
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