This part is here by popular demand, mostly for the curious, not necessarily a recommendation. If you would buy one of these, the model 4000-SII detailed here is perhaps the one you would want, as it is lighter, quieter, and draws less current than other competitive models (as date of posting). It could be under $30 delivered, so not much point in buying a cheaper model. I have not done this, so I will leave it up to the visitor to determine how it might be used.

Attwood Marine - Turbo 4000 Series II Blower
    1747-4 = Standard model - ignition protected
    1749-4 = Sealed motor also provides water resistance
13.6-VDC 3.5-Amps (5-amp fuse)
230-CFM free flow
    (30-mph wind from 4" diameter discahrge)
125-CFM flow in system
    9,000-rpm, 1.0-inch-H2O back pressure
"System" = 3-feet duct, one 90-deg bend, one collector box, louvered vent discharge.
    Size:   OD=4-1/2" H=5-1/2" L=6"
    3-year manufacturer warranty
Manufacturer's web page - Technical Specifications - Installation Instructions

See application as a carburetor cooler in article CB-208 in the Carburetor section.

Attwood Marine - Turbo 3000 Blower
    1731-1 = Standard model - ignition protected
    1733-1 = Sealed motor also provides water resistance
13.6-VDC 3.1-Amps (4-amp fuse)
145-CFM free flow
    (30-mph wind from 3" diameter discahrge)
100-CFM flow in system
    10,000-rpm, 1.0-inch-H2O back pressure
"System" = 3-feet duct, one 90-deg bend, one collector box, louvered vent discharge.
    Size:   OD=3-1/2" H=3-5/8" L=5-1/32"
    3-year manufacturer warranty
Manufacturer's web page - Technical Specifications - Installation Instructions