Based on the aggregated intelligence of 180,000-plus investors participating in Motley Fool CAPS, the Fool's free investing community, diesel engine manufacturer Cummins (NYSE: CMI) has earned a respected four-star ranking.

With that in mind, let's take a closer look at Cummins' business and see what CAPS investors are saying about the stock right now.

Cummins facts

Headquarters (Founded) Columbus, Ind. (1919)
Market Cap $17.9 billion
Industry Construction and farm machinery and heavy trucks
Trailing-12-Month Revenue $16.04 billion
Management Chairman/CEO Tim Solso
President/COO N. Thomas Linebarger
Return on Equity (Average, Past 3 Years) 21.6%
Cash/Debt $1.47 billion / $761 million
Dividend Yield 1.8%
Competitors Caterpillar (NYSE: CAT)
Navistar International (NYSE: NAV)

Sources: Capital IQ (a division of Standard & Poor's) and Motley Fool CAPS.

On CAPS, 96% of the 1,326 members who have rated Cummins believe the stock will outperform the S&P 500 going forward. These bulls include NHWeston and Blackarrow1969.

This past summer, NHWeston touched on the tailwinds working in Cummins' favor: "They make engines, a whole range of types, including nat gas power. At the first signs of either global recovery or serious municipal interest in gas-powered vehicles, they'll head for [$120 per share]."

Cummins even boasts a solid debt-to-capital ratio of 12%. That's much lower than that of other heavy-equipment stocks like Caterpillar (71%), Navistar (86%), and Deere (NYSE: DE) (78%).

CAPS member Blackarrow1969 elaborates on the Cummins bull case:

Trucking fleets are aging rapidly, and will need replacement trucks. Fleets in the United States are older than they have been in many years, possibly as old as they have ever been. Own some of this stock so you can benefit when all those engines for the replacement trucks need to be manufactured.

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