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Converting a metric starter to an SAE design

fastjeff

Gold Medal Contributor
Mercruiser 5.0 230 hp 1986. Starter is held by two 3/8 UNC body bolts that fit tight in the holes to align the starter.

New starter is for the later, metric engines and uses slightly larger 10 mm body bolts. This allows the metric starter to move around with the smaller 3/8 bolts.

The "solution" according to the manufacturer is to use "conversion bolts" that have 10 mm bodies that slim down to a 3/8 UNC thread. Swell, but nobody makes the damn thing (and I spent a long time looking). So...

Made up for the slop by wrapping the bolts with 5 or 6 layers of aluminum foil tape. This is great stuff with lots of uses. Starter is now solidly located and works great.

Jeff
 
Think about it this way, a good idea is always appropriate, the principal applies here as well. Glad that you got your problem sorted out but keep an eye on those bolts, foil is very soft and things may loosen up with time and use.
 
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