388 Gov spring.

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Jun 25, 2015 | 12:22 PM

bobva

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Joined: Apr 2006

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From: granite falls washington

388 Gov spring.

Finally got around to changing the spring. Well after a small headache with the PIB screw I open the top remove spring and Its a 388.

These are The spring numbers I came up with.

2800 RPM 1-464-650-386 Stock
3200 RPM 1-464-650-366 Cummins marine
3800 RPM 1-464-650-374 Volvo marine
4200 RPM 1-464-650-354 ??????????

Where does the 388 come in?

IP was a Virgin.

Well I'm of to the big city to get 1 screw.

Jun 25, 2015 | 10:59 PM

thrashingcows

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From: Prince George, BC

Pretty sure it's a 386....sometimes the ink runs and they look like 388. Regardless the 366 is a way better upgrade!

Jun 25, 2015 | 11:33 PM

bobva

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Posts: 840

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From: granite falls washington

I know how to read it's painted 388 plain as day.

1stGen.org ? View topic - 388 gov spring?

After I got the screw and drove the truck. installing the 366 was a waste of time. Not much of a improvement.