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Question

kohler pro 17hp ohv engine. runs great for maybe 30 minutes or until hot, then I loose gas flow to the carburator. turn off and let sit for a few moments until the gas flow trickles back to carburator, then will run for another time. any suggestions.

Submitted: 91 days and 16 hours ago.

Category: Small Engine

Value: $9

Status: CLOSED

Make: craftsman 17hp ohv lawn tractor
Model: cv490s-27508

Already Tried:
pulled the carburator cleaned. replaced fuel filter. checked hoses.

Posted by J.R. 91 days and 15 hours ago.

Info Request

Have you tried to run it with the gas cap off?

91 days and 15 hours ago.

Reply

no i have not run with cap off, but when this happens i have loosened the cap but put it back on. thought maybe the vent in the cap was plugged so i opened the vent up a little bit. still does the same thing. i think it is vapor locking, but don't know how to correct.

Posted by J.R. 91 days and 15 hours ago.

Info Request

Try to run it with the gas cap off of it as it may not be venting.

91 days and 14 hours ago.

Reply

ran engine with gas cap off. monitored gas flow through filter. at beginning gas flow was reasonably good. engine ran for approx. 20 to 30 mins. gas flow slowly diminished and engine died. with engine off gas flow slowly fills filter approx. one third.

91 days and 14 hours ago.

Reply

opps just went back and checked and their is no gas flow to the carb the filter has no fuel in it.

Posted by J.R. 91 days and 14 hours ago.

Info Request

If you pull the line off of at the fuel filter does the line fill back up?

91 days and 14 hours ago.

Reply

yes disconnecting the fuel line at the carb the fuel will flow out of the tank but at a slower rate than i would suspect

Posted by J.R. 91 days and 14 hours ago.

Answer

Have you check to make sure that the lines are not bad. The insides of the fuel line can swell due to the chemical reation of the fuel these days. I would also check the fuel tank for an obstruction as well.

91 days and 11 hours ago.

Reply

fuel tank removed and cleaned, fuel lines replaced. engine still died once. but did run for a long period of time after that.

Accepted Answer

It may have still had some remnants of debris in it. I would run it again and see what it does.

Accepts:
Expert:	J.R.
Pos. Feedback:	98.8 %
Answered:	8/23/2009

Small Engine Technician

Owner of outdoor power equipment business, repairing all makes and models.

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Question

kohler pro 17hp ohv engine. runs great for maybe 30 minutes or until hot, then I loose gas flow to the carburator. turn off and let sit for a few moments until the gas flow trickles back to carburator, then will run for another time. any suggestions.

Optional Information

Make: craftsman 17hp ohv lawn tractor
Model: cv490s-27508

Already Tried:
pulled the carburator cleaned. replaced fuel filter. checked hoses.

Info Request

Have you tried to run it with the gas cap off?

Reply

no i have not run with cap off, but when this happens i have loosened the cap but put it back on. thought maybe the vent in the cap was plugged so i opened the vent up a little bit. still does the same thing. i think it is vapor locking, but don't know how to correct.

Info Request

Try to run it with the gas cap off of it as it may not be venting.

Reply

ran engine with gas cap off. monitored gas flow through filter. at beginning gas flow was reasonably good. engine ran for approx. 20 to 30 mins. gas flow slowly diminished and engine died. with engine off gas flow slowly fills filter approx. one third.

Reply

opps just went back and checked and their is no gas flow to the carb the filter has no fuel in it.

Info Request

If you pull the line off of at the fuel filter does the line fill back up?

Reply

yes disconnecting the fuel line at the carb the fuel will flow out of the tank but at a slower rate than i would suspect

Answer

Have you check to make sure that the lines are not bad. The insides of the fuel line can swell due to the chemical reation of the fuel these days. I would also check the fuel tank for an obstruction as well.

Reply

fuel tank removed and cleaned, fuel lines replaced. engine still died once. but did run for a long period of time after that.

Accepted Answer

It may have still had some remnants of debris in it. I would run it again and see what it does.

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Question

kohler pro 17hp ohv engine. runs great for maybe 30 minutes or until hot, then I loose gas flow to the carburator. turn off and let sit for a few moments until the gas flow trickles back to carburator, then will run for another time. any suggestions.

Optional Information

Make: craftsman 17hp ohv lawn tractorModel: cv490s-27508 Already Tried: pulled the carburator cleaned. replaced fuel filter. checked hoses.

Info Request

Have you tried to run it with the gas cap off?

Reply

no i have not run with cap off, but when this happens i have loosened the cap but put it back on. thought maybe the vent in the cap was plugged so i opened the vent up a little bit. still does the same thing. i think it is vapor locking, but don't know how to correct.

Info Request

Try to run it with the gas cap off of it as it may not be venting.

Reply

ran engine with gas cap off. monitored gas flow through filter. at beginning gas flow was reasonably good. engine ran for approx. 20 to 30 mins. gas flow slowly diminished and engine died. with engine off gas flow slowly fills filter approx. one third.

Reply

opps just went back and checked and their is no gas flow to the carb the filter has no fuel in it.

Info Request

If you pull the line off of at the fuel filter does the line fill back up?

Reply

yes disconnecting the fuel line at the carb the fuel will flow out of the tank but at a slower rate than i would suspect

Answer

Have you check to make sure that the lines are not bad. The insides of the fuel line can swell due to the chemical reation of the fuel these days. I would also check the fuel tank for an obstruction as well.

Reply

fuel tank removed and cleaned, fuel lines replaced. engine still died once. but did run for a long period of time after that.

Accepted Answer

It may have still had some remnants of debris in it. I would run it again and see what it does.

Related Small Engine Questions

Make: craftsman 17hp ohv lawn tractor
Model: cv490s-27508

Already Tried:
pulled the carburator cleaned. replaced fuel filter. checked hoses.