2001 Yamaha 200 HPDI dies at idle
09-15-2019, 10:37 AM
#1
2001 Yamaha 200 HPDI dies at idle
I have twin Yamaha 200 HPDI engines and after trolling for about two hours, the port engine dies when put into idle. The engine will crank and run if you immediately put it into gear and throttle up, but it sounds ‘off’ like it’s under heavy load or something. It also won’t rev to the same rpm level as the stbd engine at the same position. The engines have over 500 hours, and are from 2001. I just got the boat 6 months ago so I don’t have much other history.
Any my help or direction would be greatly appreciated. Thank you.
Any my help or direction would be greatly appreciated. Thank you.
09-15-2019, 01:42 PM
#2
Senior Member
I had a similar issue a while back.
Turns out it was sucking air at the Racor filter housing.
The powder coating was compromised and when I unscrewed the filter, the powder coating came off stuck to the rubber gasket.
It was sucking air between the coating and the corroded housing/bracket.
I replaced both my Racor coated housings with MarPac stainless housings.
Check the low pressure fuel pumps.
You'll have to unbolt the VST to get to them.
Unbolt the pumps and pump the primmer bulb while checking for leaks on the backside of the pumps.
Another thing to check is the fuel filter, (clear plastic), under the cowl.
Check for leaks and air.
BTW, the plastic bowl will swell from gas and when you remove it, you may have to put it in the freezer to shrink it or you might not be able to get it to seat/seal.
Do you have the YDS software and cable?
Turns out it was sucking air at the Racor filter housing.
The powder coating was compromised and when I unscrewed the filter, the powder coating came off stuck to the rubber gasket.
It was sucking air between the coating and the corroded housing/bracket.
I replaced both my Racor coated housings with MarPac stainless housings.
Check the low pressure fuel pumps.
You'll have to unbolt the VST to get to them.
Unbolt the pumps and pump the primmer bulb while checking for leaks on the backside of the pumps.
Another thing to check is the fuel filter, (clear plastic), under the cowl.
Check for leaks and air.
BTW, the plastic bowl will swell from gas and when you remove it, you may have to put it in the freezer to shrink it or you might not be able to get it to seat/seal.
Do you have the YDS software and cable?
Last edited by roozter; 09-15-2019 at 04:02 PM.
Likes:
09-15-2019, 03:24 PM
#3
Senior Member
I like Roozter's answer. But you should get the YDS software and cable. Another thing about HPDI's is they will foul plugs, especially if they aren't oiling properly at trolling speed. You should check the plugs.
Be aware that HPDI's only idle on 4 cylinders, so if you have a fouled plug or two it's going to be MUCH more noticeable.
Be aware that HPDI's only idle on 4 cylinders, so if you have a fouled plug or two it's going to be MUCH more noticeable.
Likes:
Likes:
09-15-2019, 04:24 PM
#5
Originally Posted by roozter
I had a similar issue a while back.
Turns out it was sucking air at the Racor filter housing.
The powder coating was compromised and when I unscrewed the filter, the powder coating came off stuck to the rubber gasket.
It was sucking air between the coating and the corroded housing/bracket.
I replaced both my Racor coated housings with MarPac stainless housings.
Check the low pressure fuel pumps.
You'll have to unbolt the VST to get to them.
Unbolt the pumps and pump the primmer bulb while checking for leaks on the backside of the pumps.
Another thing to check is the fuel filter, (clear plastic), under the cowl.
Check for leaks and air.
BTW, the plastic bowl will swell from gas and when you remove it, you may have to put it in the freezer to shrink it or you might not be able to get it to seat/seal.
Do you have the YDS software and cable?
Turns out it was sucking air at the Racor filter housing.
The powder coating was compromised and when I unscrewed the filter, the powder coating came off stuck to the rubber gasket.
It was sucking air between the coating and the corroded housing/bracket.
I replaced both my Racor coated housings with MarPac stainless housings.
Check the low pressure fuel pumps.
You'll have to unbolt the VST to get to them.
Unbolt the pumps and pump the primmer bulb while checking for leaks on the backside of the pumps.
Another thing to check is the fuel filter, (clear plastic), under the cowl.
Check for leaks and air.
BTW, the plastic bowl will swell from gas and when you remove it, you may have to put it in the freezer to shrink it or you might not be able to get it to seat/seal.
Do you have the YDS software and cable?
Where’s the best place to get the YDS software and cable?
Thank you!
09-15-2019, 04:50 PM
#7
Senior Member
You can buy the YDS software on eBay for about $58 last time I checked. I have a Yamaha Service Manual for the Z200Y on my desk. It's invaluable. It must be available online somewhere. I did find the PDF version here although I don't know if it's the same as my original.
https://www.manualslib.com/manual/91...aha-Z200y.html
https://www.manualslib.com/manual/91...aha-Z200y.html
09-15-2019, 06:04 PM
#8
Member
Originally Posted by roozter
I had a similar issue a while back.
Turns out it was sucking air at the Racor filter housing.
The powder coating was compromised and when I unscrewed the filter, the powder coating came off stuck to the rubber gasket.
It was sucking air between the coating and the corroded housing/bracket.
I replaced both my Racor coated housings with MarPac stainless housings.
Check the low pressure fuel pumps.
You'll have to unbolt the VST to get to them.
Unbolt the pumps and pump the primmer bulb while checking for leaks on the backside of the pumps.
Another thing to check is the fuel filter, (clear plastic), under the cowl.
Check for leaks and air.
BTW, the plastic bowl will swell from gas and when you remove it, you may have to put it in the freezer to shrink it or you might not be able to get it to seat/seal.
Do you have the YDS software and cable?
Turns out it was sucking air at the Racor filter housing.
The powder coating was compromised and when I unscrewed the filter, the powder coating came off stuck to the rubber gasket.
It was sucking air between the coating and the corroded housing/bracket.
I replaced both my Racor coated housings with MarPac stainless housings.
Check the low pressure fuel pumps.
You'll have to unbolt the VST to get to them.
Unbolt the pumps and pump the primmer bulb while checking for leaks on the backside of the pumps.
Another thing to check is the fuel filter, (clear plastic), under the cowl.
Check for leaks and air.
BTW, the plastic bowl will swell from gas and when you remove it, you may have to put it in the freezer to shrink it or you might not be able to get it to seat/seal.
Do you have the YDS software and cable?
09-15-2019, 07:44 PM
#9
Originally Posted by jimcdawson
I have twin Yamaha 200 HPDI engines and after trolling for about two hours, the port engine dies when put into idle. The engine will crank and run if you immediately put it into gear and throttle up, but it sounds ‘off’ like it’s under heavy load or something. It also won’t rev to the same rpm level as the stbd engine at the same position. The engines have over 500 hours, and are from 2001. I just got the boat 6 months ago so I don’t have much other history.
Any my help or direction would be greatly appreciated. Thank you.
Any my help or direction would be greatly appreciated. Thank you.
Likes:
09-19-2019, 04:31 PM
#12
So I have the YDS 1.33 diagnostic, but I’m not sure how to use it when the engine won’t run in idle.
When I ran the static test, there seemed to be no codes. The only diagnosis was from 300 hours prior.
Also, the port engine connector had plastic prongs that prevented the cable from attaching, so I had to make jumper wires.
When I ran the static test, there seemed to be no codes. The only diagnosis was from 300 hours prior.
Also, the port engine connector had plastic prongs that prevented the cable from attaching, so I had to make jumper wires.
09-19-2019, 04:47 PM
#14
Originally Posted by KBH
You sure you found the right connector? It's got a plastic cover that needs to be removed.
Thank you for your help!
09-19-2019, 04:53 PM
#15
Senior Member
Check this thread out and see if you think it might apply. This sensor may be keeping it from running on all cylinders although I would think it would still idle on 4 cylinders with clean plugs.
250 HPDI--Max RPM 3500 ---Problem resolved
250 HPDI--Max RPM 3500 ---Problem resolved
09-21-2019, 11:04 AM
#17
I have an update.
I changed the spark plugs and the old ones were really fouled looking.
The engine runs with the new plugs. Everything seems to be within range when testing using the YDS.
I don’t have any details on when they were last changed, but what makes the spark plugs foul?
thank you!
I changed the spark plugs and the old ones were really fouled looking.
The engine runs with the new plugs. Everything seems to be within range when testing using the YDS.
I don’t have any details on when they were last changed, but what makes the spark plugs foul?
thank you!
09-21-2019, 11:59 AM
#18
Senior Member
Excessive idling, over oiling, running rich, old age, bad compression, bad spark or any combination of those. HPDI's are hard on plugs, especially if you do a lot of low speed trolling.
09-21-2019, 02:23 PM
#19
Member
Thought it was something simple. With my 200 hpdi I used ringfree regularly but as I learned the plug fouling was caused by a black soot. I used yamalube and some say that's were the soot is coming from. Some people have switched to a synthetic oil and report it solved the plug fouling. I never did. I just cleaned the plugs regularly.
09-21-2019, 02:57 PM
#20
Originally Posted by KBH
Excessive idling, over oiling, running rich, old age, bad compression, bad spark or any combination of those. HPDI's are hard on plugs, especially if you do a lot of low speed trolling.
Thank you for your help
