Name: SMX Custom Large Frame Alternator Mount
Brand: Alternator
SKU: ALT-SMX-LGFRM-MT
Availability: InStock

SMX Custom Large Frame Alternator Mount

$685.00

Build your own Large Frame Alternator mount with no machine shop needed.

Over the years we have built tons of custom alternator mounts here at Seaboard Marine. We started to hone in on a basic design that was adaptable to many situations with little modification. We generally prefer to weld the alternator to the end of engine mounting wing. A custom one off hand made alternator mount can be costly to have made and requires sourcing materials, hardware and either access to a machine shop or a lot of time with a grinder and basic tools.

This kit is designed to turn making a custom alternator mount into a simple weekend project. We have handled all of the machining and general design while leaving a bit of extra materials so you can cut, grind, bend and weld with basic portable tools to fit your application. The bi-directional slots allow plenty of adjustment to get everything aligned after its fitted and welded up, and the tensioner arm has plenty of adjustment to make it easy to find the right belt and keep it properly tensioned.

Kit includes…

Two water jet cut 3/8″ thick steel plates with bi-directional slots for easy adjustment
- We leave the base plate long on one side, so you can cut to fit your application.
Water Jet cut Tensioning brace and slotted tensioning arm.
4″ Main Pivot with 1/2″ hole for all J180 Alternators 22SI, 24SI, 28SI Etc…
All of the hardware, buts bolts and washers for a typical large frame alternator
Two additional steel plates to use as spars, ribs, bracing or whatever

The kit is not welded.

Shipping Weight

18 lbs

Shipping Dimensions

12 × 12 × 12 in

Only 1 left in stock

Description

Installation Instructions & Tips:

Cut the base plate #1 below to fit your application, we left it long intentionally so you can clear any obstructions.
1. Tony’s pro tip: If you need height to get above the stringer, Cut 2/3 though the top of the material to create a hinge and bend the metal to get an offset (later filled with weld)
Tach the base plate #1. to the motor mount wing or other location on your engine.
1. IMPORTANT Wherever you affix this it must be floating with the engine remember the engine is on isolators and moves a lot!
Tack the pivot #2 below to the alternator base plate #3 below and install the base plate with the included grade 8 3/8 Bolts hand tight
You can cut or grind the tensioning brace #4 below as needed. We designed on the large side to accommodate very large alternators.
Tack the tensioning brace #4 into place. Keep in mind the offset you will create and how the tensioning arm #4 will align with the alternator
1. You can use a washer or three if needed between the tensioning brace and slotted arm to achieve alignment
The slotted tensioning arm #5 below is also left on the longer side and may be drilled and cut to length in the field or used as is.
Once you have the everything tacked, install the alternator temporarily and measure for a belt and check the belt fit and alignment and travel of the tensioner
Cut tacks and adjust as needed.
Use the extra metal plates #6 below to create a spar, brace, or I beam,
1. particularly to span across the weld joint at the end of the engine mount wing and to stiffen the long #1 plate to mitigate vibration
Once everything looks good complete the final welding.
1. Grind off any and mill scale coating to fresh metal on our parts and the engine mount. Only weld to freshly ground metal.
You may need to run a 1/2″ drill through the alternator pivot after welding due to some slight warping.
Primer and Paint and complete the final Assembly.

Below is a Balmar Alternator installed on a QSB 6.7. This was one of many custom alternator mounts we’ve done and this is the design the kit is based upon.