Honda ATV Forum banner

1 - 19 of 19 Posts

·
Registered
Joined
·
4 Posts
Discussion Starter #1
Hey guys , new to the site. I have a 98 trx 300 that I've had for 10 years. Never any major issues with. I bought a 2001 trx350 so the 98 wasn't ridden as much. I fired up the 98 after sitting for a few months. Fired up no probs and drove it for a week all good. Today it fired up right away idled for 30 sec or so and then just dies. I thought maybe a low oil sensor that cuts engine, as I thought I had a similar problem last year. Did the same thing. Oil was low. Topped up and nor a problem since . The oil level this time is fine tho and haven't found much info on the subject. Any info would be much appreciated. Thx!
 

·
Premium Member
Joined
·
38,518 Posts
no, the trx300 would shut down in case of oil over heating, but not low on oil. and welcome to the forums :).
 

·
Registered
Joined
·
4 Posts
Discussion Starter #3
Is it possible that the oil temp sensor is faulty and if it does overheat or is faulty does it kill the spark? I guess when the issue happened to me last year it was just by chance that I topped up the oil and the problem went away. This time it is definately not too hot as it only runs for 30 sec . Anything else u would recommend I check? Thx
 

·
Premium Member
Joined
·
38,518 Posts
Is it possible that the oil temp sensor is faulty and if it does overheat or is faulty does it kill the spark? I guess when the issue happened to me last year it was just by chance that I topped up the oil and the problem went away. This time it is definately not too hot as it only runs for 30 sec . Anything else u would recommend I check? Thx
if the oil temp sensor is bad ?, it can over heat, but the control unit would not see this if the oil temp sensor is bad ?, it would not detect a bad sensor. also, if the alarm unit is bad ?, it still would not shut down. in other words, everything either has to work ?, or if not ?, it won't shut down, the alarm unit has to be good, as well as the oil temp sensor.
 

·
Registered
Joined
·
4 Posts
Discussion Starter #5
Thanks for the info. Where is the alarm unit? Do you just mean the oil light? Also do you know what the other wires are that come out of the top of the other side of the engine/ crankcase cover. I guess I will start checking for fuel issues as I don't know what would cause the spark to cut out after running for 30 sec.
 

·
Premium Member
Joined
·
38,518 Posts
Thanks for the info. Where is the alarm unit? Do you just mean the oil light? Also do you know what the other wires are that come out of the top of the other side of the engine/ crankcase cover. I guess I will start checking for fuel issues as I don't know what would cause the spark to cut out after running for 30 sec.
alarm unit is under the front fender, right below the handle bars, strapped in a rubber boot holder, it has a green connector on the unit. right lower side, behind the metal cover is your neutral , reverse, and oil temp sensor. left side engine case cover, is your stator and pick up coil wires.
 

·
Premium Member
Joined
·
38,518 Posts
to answer why your losing spark ?, most times, its either a bad spark plug coil ? ( not very common..but does happen ). or, your c.d.i. unit, which is also right next to the alarm unit, it is wider, taller, has white connectors on it, or red on some models or aftermarket from what I know of.
 

·
Super Moderator
Joined
·
5,062 Posts
It’s a 98, your alarm unit and cdi are the same box on this model. Black box (in the same area as shadtree stated) with a black plug.

I’d change the spark plug and plug cap first, then the coil. Start with the cheapest options.
 

·
Premium Member
Joined
·
38,518 Posts
It’s a 98, your alarm unit and cdi are the same box on this model. Black box (in the same area as shadtree stated) with a black plug.

I’d change the spark plug and plug cap first, then the coil. Start with the cheapest options.
haha, totally lost thought on the year !..lol, your correct..one unit.
 
  • Like
Reactions: SamUK

·
Premium Member
Joined
·
4,702 Posts
Does your oil light come on? Check the sensor w an ohmeter like the service manual says. Pull the right footstep off to make access easier, then the cover, then the connector. Should be 10KOhm thru the center pin and body of the sensor at 75F. Ground the connector and oil light should come on. If not perform voltage and continuity checks at the alarm unit.

Sorry this is a 93 shown download your service manual from the link in my sig block
 

Attachments

·
Registered
Joined
·
2,924 Posts
Literally , there is a low oil kill on every model , if you run it long enough low of oil it will kill !
The only low oil kill is the motor will seize up.
 
  • Like
Reactions: Manny

·
Registered
Joined
·
2,924 Posts
Hey guys , new to the site. I have a 98 trx 300 that I've had for 10 years. Never any major issues with. I bought a 2001 trx350 so the 98 wasn't ridden as much. I fired up the 98 after sitting for a few months. Fired up no probs and drove it for a week all good. Today it fired up right away idled for 30 sec or so and then just dies. I thought maybe a low oil sensor that cuts engine, as I thought I had a similar problem last year. Did the same thing. Oil was low. Topped up and nor a problem since . The oil level this time is fine tho and haven't found much info on the subject. Any info would be much appreciated. Thx!
The oil sensor will only bring oil temp light on --- it will not shut the bike down.
 
  • Like
Reactions: Manny

·
Premium Member
Joined
·
38,518 Posts
Hey guys , new to the site. I have a 98 trx 300 that I've had for 10 years. Never any major issues with. I bought a 2001 trx350 so the 98 wasn't ridden as much. I fired up the 98 after sitting for a few months. Fired up no probs and drove it for a week all good. Today it fired up right away idled for 30 sec or so and then just dies. I thought maybe a low oil sensor that cuts engine, as I thought I had a similar problem last year. Did the same thing. Oil was low. Topped up and nor a problem since . The oil level this time is fine tho and haven't found much info on the subject. Any info would be much appreciated. Thx!
The oil sensor will only bring oil temp light on --- it will not shut the bike down.
I know on my '89 trx350D foreman, the service manual says the alarm unit on it is suppose to shut the engine down in the event of an over heat , not sure if this is oil low ?, or just from getting to hot ?.
 

·
Registered
Joined
·
2,924 Posts
Hey guys , new to the site. I have a 98 trx 300 that I've had for 10 years. Never any major issues with. I bought a 2001 trx350 so the 98 wasn't ridden as much. I fired up the 98 after sitting for a few months. Fired up no probs and drove it for a week all good. Today it fired up right away idled for 30 sec or so and then just dies. I thought maybe a low oil sensor that cuts engine, as I thought I had a similar problem last year. Did the same thing. Oil was low. Topped up and nor a problem since . The oil level this time is fine tho and haven't found much info on the subject. Any info would be much appreciated. Thx!
The oil sensor will only bring oil temp light on --- it will not shut the bike down.
I know on my '89 trx350D foreman, the service manual says the alarm unit on it is suppose to shut the engine down in the event of an over heat , not sure if this is oil low ?, or just from getting to hot ?.
Okay -- start your 350D then remove the wire off the oil sensor and ground that wire to the frame -- see what happens.
 
  • Like
Reactions: Manny

·
Premium Member
Joined
·
38,518 Posts
The oil sensor will only bring oil temp light on --- it will not shut the bike down.
I know on my '89 trx350D foreman, the service manual says the alarm unit on it is suppose to shut the engine down in the event of an over heat , not sure if this is oil low ?, or just from getting to hot ?.
Okay -- start your 350D then remove the wire off the oil sensor and ground that wire to the frame -- see what happens.
I would, but the battery gave up the ghost..lmao. butttttttt, I can tell you this, if I unhook the oil temp sensor, and ground it, it will kick the fan on, as its tied through the alarm unit. maybe if the fan doesn't turn on, and cool it down ?, it then shuts the power off to the c.d.i. ?, next time I am at my local Honda dealership, I will ask my bud there, if anyone knows ?..HE WILL !.
 
1 - 19 of 19 Posts
Top