fuel pressure and cranking charge coil volts

[shipale]

motor is evinrude E150STLCUR - 87 I think. Runs at idle will not accelerate. Installed a fuel pressure gage. At idle it reads zero. If you pump the bulb the gage registers (so I am sure its OK). Book calls for 1PSI at 600rpm. Sure seems like fuel pump is defective.<br /><br />I am using a simpson 260 (analog VOM). I read on your site AC readings times 1.414 would be the reading on peak reading voltmeter. Cranking coil volts in book is 200. I am reading 100VAC each coil (141V peak - right). Coil ohms is 750 and book calls for 970. Ohmic value seems wrong and coil volts wrong, but seems like coils OK (like readings for ohms and volts). Also did a quick check on charging circuit 2-3 amps at idle.<br /><br />Also ohmed out so-called defective stator removed by local outfit for me last year. Ohmic values were 970 ohms. Seems like wrong stator?

 

[clanton]

Re: fuel pressure and cranking charge coil volts

Your engine should have a 35 amp stator, charge coil ohms close to 970, charge coil voltage output with peak reading meter should be 200 volts at cranking rpms. The regular 150s have a 9 amp stator, charge coil ohms close to 480, charge coil putput voltage should be 200 volts with peak reading meter. Fuel pressure 3 lbs at idle. You should verify the specs with an Oem manual. Im doing this from memery, and do not have 87 Oem manual.

 

[shipale]

Re: fuel pressure and cranking charge coil volts

OK kinda new that. I'll restate the questions. Sounds like I might have the wrong stator installed? Although it seems like its functioning correctly. If I had a peak reading voltmeter then the measured voltage would have been 141V?<br /><br />And book calls for 1PSI at idle. Seems like fuel pump is defective?<br /><br />3 questions and really need second opinion.

 

[seahorse5]

Re: fuel pressure and cranking charge coil volts

You may have a stator that has been replaced with a rebuilt version by Rapair, inc. Some of those will have different charge coil resistance specs.

 

[Trent]

Re: fuel pressure and cranking charge coil volts

Troubleshooting

 

[clanton]

Re: fuel pressure and cranking charge coil volts

Trent should tell you about the X 1.414. I only use a peak reading meter or adapter.<br /><br /> The Rapair stator specs should be 970 ohms for 35 amp stator, if it is a Rapair stator, it has a 1 year warranty.<br /><br /> I finaly found spec for fuel pump in 1990 book, 1 lb at 600 rpms, but my 1989 class notes say 3 lbs at idle. <br /><br />I cant help much on the stator, cost of new stator is over 250.00, and I do not change without testing with peak reading meter.

 

[clanton]

Re: fuel pressure and cranking charge coil volts

Hi Trent, posted almost same time. I headed to Panama City in about 1/2 hour, will stop by Capt Kens place for a short visit.