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RickeyD


Joined: Sep 23, 2012
Points: 1

Honda GX390 motor/no markings on oil dip stick
Original Message   Sep 23, 2012 10:33 pm
Hello, I recently purchased a Dayton Portable Generator powered by a Honda GX390 motor. First, Dayton sent the wrong engine manual with the unit. Second, I looked up the manual online to find that the oil level in the motor is critical. I filled the engine today with oil and noticed that there are NO markings on the dipstick indicating high and low engine oil levels, only x's up and down the entire length of the stick. The online manual specified an upper and lower marking...what's up with that? How am I supposed to ensure there is sufficient oil or prevent overfilling the engine if there are no markings? Thank you.
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carlb


Joined: Nov 16, 2010
Points: 269

Re: Honda GX390 motor/no markings on oil dip stick
Reply #1   Sep 24, 2012 9:14 am
I assuming that this gx390 does not have an extended oil fill tube and the oil fill cap is near the bottom of the motor like on most of the gx series.   If that is the case i don't believe it is possible to overfill the engine with oil as before an overfill would happen the oil would be overflowing the fill hole.   I usually fill my gx motors to the bottom of the threads of the fill hole with the engine level.
FrankMA


Location: Merrimack Valley/Northeastern Mass
Joined: Jul 1, 2010
Points: 587

Re: Honda GX390 motor/no markings on oil dip stick
Reply #2   Sep 24, 2012 10:24 am
The oil is full when is just touches the upper hash marks on the dip stick. You have to unscrew the dip stick, wipe it clean but do not screw it back into the fill port. You're supposed to line up the dip stick like you would if you were going to screw it back into the fill port (without actually screwing it back in) and then check the oil level. I have a GX390 on my new Honda EM6500SX Generator and pages 43 (Engine Oil Check) & 44 (Change Engine Oil) in the Servicing your Generator section provides a drawing showing exactly how to check and change the oil.

Here's a link to the manual. You may have to do a copy and paste: http://powerequipment.honda.com/pdf/manuals/00X31Z236000.pdf

This message was modified Sep 24, 2012 by FrankMA


Toro Wheel Horse 522xi GT, Honda HS928TA, Honda HS621AS, Honda HS520A, Toro CCR3000 (work in progress), Honda HS624WA (sold 08/23/2010), Stihl BR550 Backpack Blower, Stihl MS250, McCulloch MS1635, Honda EM6500SX Generator
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