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This may sound over simplified but..... old battery cables corrode onboth ends so you have less amperage carried by the cables. (i.e. fewer strands of copper trying to carry more amperage than they are capable of. The next time you do a start cycle place your hands on the battery terminals one at a time and check to see if they are HOT to the touch. Also do the same thing for the chassis ground and the terminal lug at the starter. ANY hot terminal is a sign the cable has broke down either from age/vibration wear or corrosion. If you suspect the battery cables are bad get a VERY GOOD set of jumper cables (2 sets connected together if necessary) and do a direct from the battery to the starter connection. This is loads of amperage so be very careful and DO NOT do this alone. But, if the starter spins faster you have battery cable problems.

IF you have an external to the starter relay that too can cause the problem due to worn / defective contacts.

I will watch for any responses.

Thanks for using FixYa.


Pramac GBW30P... | Answered on Jun 26, 2010

Try to check (move up and down) the level sensor if it is really in the external tank. The flowing bowl may be flooded.

Pramac GBW30P... | Answered on Jun 07, 2010

This likely has a diode module which rectifies a low voltage AC winding to do the charging.

Things to check: There USUALLY is a fuse on the low voltage winding. It SOMETIMES is within the generator covering.

Check for loose connections or broken wires.

The diode module is usually a 25 amp block about 1.25 inches square with 4 faston terminal connections.

Use a meter set to AC to check voltage on the AC terminals... might be around 18 volts or so.

Then on the DC terminals labeled + and - with meter set to DC.

To charge a 12 volt battery there needs to be about 13.75 volts or so.

Pramac... | Answered on Apr 02, 2010

make sure gen isnt stopt on protection overtemperature or oil level or coolant level. try to bridge protections one by one to find the course. first make sure all fluids are on level and coolers are clean. fanbelt tension and coolantthermostat can also be wrong.

Pramac GBW30P... | Answered on Feb 10, 2010

there are just a few thing's that cause this, one is the voltage regulator is failing and the other is one phase of the three phase Alternator is open, u will need to have the alternator windings tested for continuity and shorts to ground, also a unregualted voltage test to determione if the voltage regulator is the problem.

Pramac... | Answered on Jan 08, 2010

Refer to the NEC (National Electric Code) for ampacity rating of cables.

These depend on the wire size and insulation and the type of cable.

When in doubt or near a limit, go one size or two larger. When cable is long, go a couple sizes larger (smaller number).

Pramac GBW30P... | Answered on Dec 14, 2009

There are two 14mm bolts on both sides (lower) of the motor. Unscrew one or both and drain the oil....Replace with sae 30 or 10w30 oil and should take almost a quart. (Put the bolts back in and tork slightly.) Check oil level.

Pramac Storm... | Answered on Sep 20, 2009

Adjust engine speed

Pramac Storm... | Answered on Sep 18, 2009

you should have a drain plug at the side and bottom of the motor crank case its a small plug with a square head how old is your generator if new put 10w30 oil if old put sae30w if really bad add some lucas oil treatment also now a 9 h.p. should take less then 2 quarts

Pramac Storm... | Answered on Jun 29, 2009

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