Engine Rebuild Kit B43 B48

This is a complete rebuild kit that includes all major parts you need to make your Onan like new again.

Note: Most parts in this kit are available individually on this site. You can mix and match whatever you need. The full kit is intended for engines that have been overhauled several times in the past or just plain run into the ground and are severely worn.


Engine Model: B43E, B43G, B43M , B48G or B48M Along with Spec Number.
Piston Size: STD. .010" .020" or .030" Oversize.
Con Rod Size: STD. .010" .020" or .030" Undersize.
Main Bearing Size: STD. .010" .020" or .030" undersize.

NOTE: If no sizes are indicated by you all parts shipped will be STD.

Rebuild Kit includes:

Two Pistons with Rings & Wrist Pins:
Two Con Rods:
Two Main Bearings:
Two Cam Bearings:
Two Intake Valves:
Two Exhaust Valves:
Two Intake Guides:
Two Exhaust Guides:
Four Valve Springs:
Valve Locks/Keepers:
One Rebuilt Oil Pump: New pumps no longer available.
One Oil By-Pass Spring:
One 168-0187 Gasket & Seal Kit:



Made in U.S.A.

Models listed are for general reference only and do not guarantee this part will fit your specific application.

Checking the correct parts manual and comparing the old part to the new one if pictured is the buyers responsibility, not ours. Once placed, all sales are final.

No Returns on Electrical Parts.

IF ITEM SHOWS SOLD OUT, Please CONTACT US for availability and/or back order status. We get busy at times, if a part is listed as sold out please inquire about it as our website may not reflect current stocking levels.