This is for a rowcrop 300 or 350, haven't done a 300U engine.
To install 300 or 350 engine in a H
1. If you are planning on using the 300/350 live pump be sure to use the timing cover and related parts for 300 or 350, SH or late H (older H bolt holes are different).
2. Use the H fan, 300/350 fan is to large in diameter.
3. Use the air cleaner & pipe from air cleaner to carburetor for a SH, the one for an H is to small for the 300/350 carburetor.
4. Use a 300/350 or SH flywheel and a SH clutch plate and pressure plate if you are going to pull it hard (H flywheel, clutch plate and pressure plate will work but is smaller, H 10”, SH/300/350 10 ½” ).
5. Use H governor or use throttle shaft from H governor in 300/350 governor.
6. Have to convert vent from back of head on H to vent from valve cover for 300/350.
7. Change oil pressure fitting from H onto 300/350 block before installing side rail channels (fitting is hard to change after rails are installed).300/350 had small line from block to gauge.
This post was edited by Dave S. at 12:41:00 06/25/14.
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