Can anyone explain to me why my Yamaha engine fouls out sparkplugs every 3 weeks? The engine was rebuilt 2 years ago, and still has good compression. It has always burnt through the sparkplugs frequently.
(Help!) 225 vmax
Can anyone explain to me why my Yamaha engine fouls out sparkplugs every 3 weeks? The engine was rebuilt 2 years ago, and still has good compression. It has always burnt through the sparkplugs frequently.
(Help!) 225 vmax
What plugs are you using?
Bill Perry
Zwolle, LA (Toledo Bend)
bpicinc_2000@yahoo.com
2001 ZX-250 VMAX 225. HDS-9 Carbon, HDS-7Carbon, 3D Sonar, HB 998c hd si, Active Target, MG Tour Pro 36v, 12" Slide Master
USN, USS Newport News CA-148
What oil are you using?
Yamalube semi synthetic Tcw3
NGK BR8HS-10Originally Posted by bpicinc
Is your oil pump linkage adjusted to specs?
Marks Props 317-398-9294, 1850 East 225 South, Shelbyville, Indiana 46176 propellerman59@gmail.com http://www.marksprops.com/index.html
Bad/lazy O2 sensor will lead to fouled plugs. Also check to make sure the oil linkage is set to spec as previously stated. Most are set rich. BR8HS10 is the plug you want.
This!!
Bill Perry
Zwolle, LA (Toledo Bend)
bpicinc_2000@yahoo.com
2001 ZX-250 VMAX 225. HDS-9 Carbon, HDS-7Carbon, 3D Sonar, HB 998c hd si, Active Target, MG Tour Pro 36v, 12" Slide Master
USN, USS Newport News CA-148
Do not know anything about the oil linkage set to specs. Please inform. 02 sensor was changed about 2 years ago so maybe the oil linkage thing is the issue.
Last edited by lugnut1; 06-19-2019 at 05:14 PM.
Read>>> http://www.bbcboards.net/showthread.php?t=721640
Marks Props 317-398-9294, 1850 East 225 South, Shelbyville, Indiana 46176 propellerman59@gmail.com http://www.marksprops.com/index.html
Thanks very much mine is not resting on the stop
Last edited by lugnut1; 06-20-2019 at 10:04 PM.
Thanks once again fix it today . with motor off took linkage off had to make to full turn now it is resting on the stop.
That wasn’t off much. Probably not your issue.
Marks Props 317-398-9294, 1850 East 225 South, Shelbyville, Indiana 46176 propellerman59@gmail.com http://www.marksprops.com/index.html
How far should it have been to be an issue? I Have to gap plugs on 45 to make them last three weeks. If I don't it will not idle in gear after the motor warms up - it back fires & shuts off. Specifically, after running on the water & idling to load boat back onto trailer it backfires & shuts off.
Last edited by lugnut1; 06-23-2019 at 08:00 AM.
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