The Electromaax Yanmar secondary alternator mounting brackets, fit Yanmar marine engines over 40 HP. Each system allows for dual alternator installations in most Marine engine bays.
With this bracket kit you can run twin alternators consecutively in order to substantially reduce charging time. This bracket allows you to increase your output up to 250 12 V (500 with two alternators in 12 V and 330 amps in 24 V) if required.
Our Brackets combined with serpentine pulleys, GenMaax alternators and the Pro X smart regulator enable you to eliminate back up generators if space permits.
Electromaax has an extensive line of top quality second alternator brackets for most Yanmar engines over 40 HP — from the 1980s until today. Since the recent arrival (2012) of Yanmar multi groove marine engines, it is now viable to add high output marine alternators in multiple voltages on one or two engines.
Now, with the addition of Victron DC to DC chargers, and the Emaax Pro X, regulator combined with Life PO 4 battery technology — second alternators are starting to eliminate the need for back up generators.
The 4JH40, 4JH45, 4JH57, 4JH80 and the 4JH110 use this second alternator bracket system. Part Number ELE-YAN12v 129677-77600
We machine the actual 2nd bracket on ELE-YAN 129677-77600 out of "two pieces" of high tensile steel, rather than the less expensive welded 3 part alternative. Welds can break and in the welding process these parts can distort. However our two part design eliminates this threat and guarantees perfect alignment.
This critical piece is also black oxidized to prevent rusting.
NOTE: for 24 V we make a smaller alternator pulley and the second bolt on crank is slightly larger in diameter. This allows the alternator to start making energy earlier. Because the second alternator does not spin the water pump, the larger crank has no bearing on engine cooling.
The new 4JH40, 4JH45, 4JH 57, 4JH 80 and the 4JH 110 come with the engine mount Bracket, second crank pulley, 4 bolt spacers, second alternator adjustment arm (with mechanism to keep the alternator tensioned properly), Fuel return hose, belt cover, oil plug filler, air filter bracket and all the necessary washers, nuts and bolts in the image below.
Upon purchase, your technician will contact you prior to shipment to discuss your purchase and to ensure you get the right parts and experience the smoothest installation possible.