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9050170-1-M-Tecumseh-630978-Diaphragm Assy.
Part Location Diagram of 630978 Tecumseh Diaphragm Assy.
See part B-22 in the diagram
( Grid squares measure 1x1 inch )
9050170-1-S-Tecumseh-630978-Diaphragm Assy. Part Location Diagram of 630978 Tecumseh Diaphragm Assy.

Diaphragm Assy. 630978

Manufactured by:
Tecumseh
ERP Number:
ERP9050170
Part Number:
630978
Original Equipment Manufacturer ?
  Works with your model  H25-25219H!
$6.48
★★★★★
★★★★★
1 Review
In Stock
Delivers in 3-5 Business Days!

Easy 

15 - 30 mins 

(2 rated repairs) ?
  Works with your model   H25-25219H!

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Frequently Purchased Together Troubleshooting Reviews Repair Instructions Model Cross Reference

Frequently Purchased Together

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INLET NEEDLE
$14.02
On Order

Troubleshooting

This part works with the following brands:
  • Tecumseh
  • Craftsman
  • Toro
This part works with the following products:
  • Engine
  • Snow Blower
  • Chainsaw
  • Lawn Mower
Part# 630978 replaces these:
630978, 631069, 631110, 631136,
★

Customer Part Reviews

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4.0
Average Rating (out of 5):
★★★★★
★★★★★
(1 Review)
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★★★★★
★★★★★
Finally found it!
Company that made carb. Couldn't find part for it. Just wished parts could have been mailed.
Guest - January 28, 2022
Verified Purchase

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.

Easy 

15 - 30 mins 

(2 rated repairs) ?
  • 1
Sort by:  
Sorry, we couldn't find any existing installation instruction that matched.

Engine had sat for several years would not start

Earl from Marietta, Georgia

0 of 1 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
30 - 60 mins
Tools:
Nutdriver, Pliers, Screw drivers, Socket set, Wrench (Adjustable), Wrench set
Parts Used:
630978
1. Removed and disassembled carburetor
2. Cleaned spray carb cleaner
3. Used small wire to clear tiny holes
4. Removed and cleaned needle valves
5. Installed new diaphragm and reassembled
6. Installed new spark plug
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Carburetor flooding

Larry from Harrison Twp., Michigan

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Parts Used:
630978
1. Remove four screws holding the carburetor diaphragm plate
2. Remove the two fuel mixture adjustment screws
3. Scrap with a single edge razor blade the old gasket from the carburetor and diaphragm plate.
4. Blow out the fuel mixture ports with gum out and clean the carburetor fuel bowl with the same.
5. Assemb le the new diaphragm, gasket and plate installing the four screws.
6. Install the metering needle screws with an initial 1 turn out for each
7. Start engine and adjust the metering screws.
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  • 1

Model Cross Reference

This part works with the following models:
ERP Number: ERP9050170
Manufacturer Part Number: 630978
Brand Model Number Description
Tecumseh 1400-1401 Engine - Tecumseh Small Engine Model 1400-1401 (14001401, 1400 1401) Parts
Tecumseh 1400-1401A Engine - Tecumseh Small Engine Model 1400-1401A (14001401A, 1400 1401A) Parts
Tecumseh 1400-1401C Engine - Tecumseh Small Engine Model 1400-1401C (14001401C, 1400 1401C) Parts
Tecumseh 1400-1401D Engine - Tecumseh Small Engine Model 1400-1401D (14001401D, 1400 1401D) Parts
Tecumseh 1400-1401E Engine - Tecumseh Small Engine Model 1400-1401E (14001401E, 1400 1401E) Parts
Tecumseh 1400-1401F Engine - Tecumseh Small Engine Model 1400-1401F (14001401F, 1400 1401F) Parts
Tecumseh 1400-1401G Engine - Tecumseh Small Engine Model 1400-1401G (14001401G, 1400 1401G) Parts
Tecumseh 1400-1401H Engine - Tecumseh Small Engine Model 1400-1401H (14001401H, 1400 1401H) Parts
Tecumseh 1400-1401J Engine - Tecumseh Small Engine Model 1400-1401J (14001401J, 1400 1401J) Parts
Tecumseh 1400-1402 Engine - Tecumseh Small Engine Model 1400-1402 (14001402, 1400 1402) Parts
Tecumseh 1400-1402A Engine - Tecumseh Small Engine Model 1400-1402A (14001402A, 1400 1402A) Parts
Tecumseh 1400-1402B Engine - Tecumseh Small Engine Model 1400-1402B (14001402B, 1400 1402B) Parts
Tecumseh 1400-1425 Engine - Tecumseh Small Engine Model 1400-1425 (14001425, 1400 1425) Parts
Tecumseh 1400-1430 Engine - Tecumseh Small Engine Model 1400-1430 (14001430, 1400 1430) Parts
Tecumseh 1400-1430A Engine - Tecumseh Small Engine Model 1400-1430A (14001430A, 1400 1430A) Parts
Tecumseh 1400-1432 Engine - Tecumseh Small Engine Model 1400-1432 (14001432, 1400 1432) Parts
Tecumseh 1400-1432A Engine - Tecumseh Small Engine Model 1400-1432A (14001432A, 1400 1432A) Parts
Tecumseh 1400-1442 Engine - Tecumseh Small Engine Model 1400-1442 (14001442, 1400 1442) Parts
Tecumseh 1400-1442A Engine - Tecumseh Small Engine Model 1400-1442A (14001442A, 1400 1442A) Parts
Tecumseh 1400-1442B Engine - Tecumseh Small Engine Model 1400-1442B (14001442B, 1400 1442B) Parts
Tecumseh 1400-1444 Engine - Tecumseh Small Engine Model 1400-1444 (14001444, 1400 1444) Parts
Tecumseh 1400-1444A Engine - Tecumseh Small Engine Model 1400-1444A (14001444A, 1400 1444A) Parts
Tecumseh 1400-1448 Engine - Tecumseh Small Engine Model 1400-1448 (14001448, 1400 1448) Parts
Tecumseh 1400-1448A Engine - Tecumseh Small Engine Model 1400-1448A (14001448A, 1400 1448A) Parts
Tecumseh 1400-1448B Engine - Tecumseh Small Engine Model 1400-1448B (14001448B, 1400 1448B) Parts
Tecumseh 1400-1448C Engine - Tecumseh Small Engine Model 1400-1448C (14001448C, 1400 1448C) Parts
Tecumseh 1400-1448D Engine - Tecumseh Small Engine Model 1400-1448D (14001448D, 1400 1448D) Parts
Tecumseh 1400-1448E Engine - Tecumseh Small Engine Model 1400-1448E (14001448E, 1400 1448E) Parts
Tecumseh 1400-1448F Engine - Tecumseh Small Engine Model 1400-1448F (14001448F, 1400 1448F) Parts
Tecumseh 1400-1449 Engine - Tecumseh Small Engine Model 1400-1449 (14001449, 1400 1449) Parts
Diaphragm Assy.
$ 6.48
In Stock
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Stock Status
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Mail-In Recycling Rebate

Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.

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