P500 Hard start cold

Mudder

Mudder

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Get it fixed yet???
 
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25yrds

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Oct 28, 2019
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Get it fixed yet???
No. Got busy with work. I did, however, start it up last night. Cranked for a long time, didn't fire. Put my foot on the gas pedal, opened it up just a little bit. Fired right up. Question, is there a throttle position sensor on this little engine? If so could be it needs adjusting
 
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25yrds

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Oct 28, 2019
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Well, that doesn't work. Tried it today after sitting 3 days, long crank, no fire, opened throttle a bit, still no fire. Cycled key a few times, no fire. Cranked a bit longer and it started. Shut it off and tried again. Started immediately. Runs extremely well.
No. Got busy with work. I did, however, start it up last night. Cranked for a long time, didn't fire. Put my foot on the gas pedal, opened it up just a little bit. Fired right up. Question, is there a throttle position sensor on this little engine? If so could be it needs adjusting
 
Eltobgi

Eltobgi

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Could it be bad or clogged injectors from sitting for so long?
 
C

CBpioneer

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Jun 16, 2019
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Cape Breton Canada
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Maybe Canadian version is slightly different, but mine I just turn on key, wait till it says "hello Honda" on the display(friendly little critter) and crank. It fires right up. Back it out of the garage to sit a couple of minutes to warm. Then drive away on an adventure. Hasn't gotten real cold yet, just around freezing or slightly below.
 
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70Bones

70Bones

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Put a voltmeter across your accessory outlet (cigar lighter to us old guys), and watch the voltage while cranking. These honda's are extremely sensitive to voltage, and if below 12 volts while cranking, the computer just won't let it start.
 
2

25yrds

Well-Known Member
Oct 28, 2019
150
370
63
Idaho
Ownership

  1. 500
Put a voltmeter across your accessory outlet (cigar lighter to us old guys), and watch the voltage while cranking. These honda's are extremely sensitive to voltage, and if below 12 volts while cranking, the computer just won't let it start.
I'm pretty sure you're right on the money. Happened again the other night after it had been sitting cold, like 18degrees. Just didn't sound like it was cranking as fast as it should. Cranked for a long time though. A weak cell in battery would definitely explain it.
 
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2

25yrds

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Oct 28, 2019
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Idaho
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  1. 500
Ok. I'm pretty sure I've got it figured out. Charged battery, Let I set outside over the weekend. Temperatures were around 20 degrees. Tried to start it. Really slow cranking. No start. Cycled, retried probably 15-20 times. Every time it seemed to crank a little faster. Then, when it cranked fastest it fired and ran great. Probably got to heavy oil in it for cold but bottom line, I'm gonna contact dealership where I bought it and see if they will warranty the battery. If not I'm gonna get a new one with more cca's
 
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WillyBill

WillyBill

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Ok. I'm pretty sure I've got it figured out. Charged battery, Let I set outside over the weekend. Temperatures were around 20 degrees. Tried to start it. Really slow cranking. No start. Cycled, retried probably 15-20 times. Every time it seemed to crank a little faster. Then, when it cranked fastest it fired and ran great. Probably got to heavy oil in it for cold but bottom line, I'm gonna contact dealership where I bought it and see if they will warranty the battery. If not I'm gonna get a new one with more cca's

Remember to measure inside the battery box. If I remember correctly, there’s not a lot of extra room. If you find a bigger cca agm that fits let me know. May need a new one soon too. Stock cca is 240 I believe.
 
2

25yrds

Well-Known Member
Oct 28, 2019
150
370
63
Idaho
Ownership

  1. 500
Remember to measure inside the battery box. If I remember correctly, there’s not a lot of extra room. If you find a bigger cca agm that fits let me know. May need a new one soon too. Stock cca is 240 I believe.
No extra room in my battery box. Actually bit the bullet and put a new in today. Autozone EXT14 Gold. Don't remember the cca's but I'm thinking it's around 240-260. I suspected it was cranking slow but I didn't realize how slow until now! WOW! Spins so fast it's running before I can let of the key! Unseasonably warm right now (hit 50 today). Can't wait to try it in cold weather
 
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nctrailboss

nctrailboss

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Jun 30, 2018
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north carolina
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  1. 500
No extra room in my battery box. Actually bit the bullet and put a new in today. Autozone EXT14 Gold. Don't remember the cca's but I'm thinking it's around 240-260. I suspected it was cranking slow but I didn't realize how slow until now! WOW! Spins so fast it's running before I can let of the key! Unseasonably warm right now (hit 50 today). Can't wait to try it in cold weather
I've had great luck with those batteries.
 

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