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Compass Marine How To | all galleries >> Welcome To >> Installing A High Output Alternator & Serpentine Pulley Kit > The Problem
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The Problem

When I began to examine the layout of the pulleys and engine I was concerned an E-Maax kit would not work or fit. The timing marks and stock crank pulley are very, very close to one another. The design of the Electromaax pulley kits are ingenious in that they simply fit over the main crank for an easy install. This is good and bad for some motors as they make the crank pulley slightly larger.

I shot some photos, took some measurements and I picked up the phone and Called John one of the owners of Electromaax.

other sizes: small medium large original auto
Warren Updike 29-May-2012 16:42
The Volvo MD2030 looks very much like my Perkins M30 based on the Detroit Diesel 103-10 before Perkins USA service was taken over by Volvo-Penta. The bore/stroke/compression are the same. The arrangement of bolted on stuff is very similar. The block may actually be from Kubota as my manual says made in Japan.

When I did my alternator upgrade I wanted to change the belt from 3/8 to 1/2" to drive the alternator at the 100+ amps of the new alternator. A serpentine belt would have been great as the larger alternator causes more belt wear. Accordingly, I was forced to limit output via the regualtor to 80A. However, I find that the acceptance rate of my 400A bank is rarely more than 50-60A and so sufficient for our use. Still, I'd prefer to have a serpentine belt.

Great article, pictures worth 1k words. Thanks