A4 replacement
Heres some references, followed by a little general advice. Atomic 4 to Beta Diesel Conversion ~ by Ian Elliott http://tritonclass.org/mir/A42BETA.htm This is an article by Practical Sailor back in 1988 ... http://www.sailorphil.com/a4replacement.htm Beta Marine Atomic 4 diesel replacement engines: For further details complete our enquiry form < http://www.betamarine.co.uk/enq.htm >, or if Stateside call our freephone number 1-800-682-8003 for Stanley's expert advice. Specs: http://www.marinedieseldirect.com/repower/specs/betamarine/10_20bhp.pdf BZ482 - 13.5 HP ~ http://www.betamarinenc.com/bz482_atomic.htm BD722 - 20 HP ~ http://www.betamarinenc.com/bd722_atomic.htm BD1005 - 28 HP ~ http://www.betamarinenc.com/bd1005_atomic.htm Universal-Westerbeke A4 diesel replacements: http://www.marysvillemarine.com/catalog/cat_p132-133.pdf M3-20B - 20HP M-25XPB - 26HP M-35B - 35HP M-40B - 37.5HP Engine alignment: 1. Ensure the engine mounts can be adjusted (no heavy rust on threads), and are not fatigued, sagging, or oil soaked. If the mounts are over 10 years old, they are suspect, and must be replaced. Ensure they are firmly attached to the stringers. The stud should be vertical, not canted to one side. This puts a side load on that mount and accelerates wear, it also makes alignment difficult. 2. Disconnect the couplers by bolt removal and separate them - note any rough misalignment. 3. Clean the mating surfaces of the couplers of any rust. 4. Adjust the engine/transmission mounts to get the couplers in the same plane, by eye. This is the rough alignment. You may discover the mounts run out of adjustment before the engine is aligned. In this case, I would suggest it be evaluated by a mechanic, as the engine mount/strut system will have to be rebuilt. 5. Now slide the shaft coupler forward to contact the transmission coupler. They should mate evenly - just imagine both couplers are pistons in the same cylinder - contact should be made flat and square - check with a straightedge around the couplers for a concentric fit. 6. Now for the final adjustment - get comfy, and insert a .004" feeler gauge between the couplers. Check for even fit all around the coupler circumference. Adjust the engine mounts to this standard, while maintaining the couplers inside the imaginary cylinder. Take your time, it's not easy! 7. When done, torque down the engine mount lock nuts and recheck alignment. Now re-install the coupler bolts using new lock washers - NOTE - these bolts are fine thread, for strength and vibration resistance. A jumper wire between opposite coupler bolts - 10 gauge - can be used to bond the prop shaft. 8. Consider installing a "Drivesaver" or other flexible unit between the couplers to compensate for the minor misalignment that happens underway.
