Brutus_Tx
Member
- Messages
- 4
- Reaction score
- 0
- Points
- 20
- Boat Make
- Yamaha
- Year
- 2011
- Boat Model
- AR
- Boat Length
- 21
Good day... I just wanted to share my experiences from the weekend and to ask a question.
I have a 2011 AR210 with ~ 100 hrs on the engines and a few weeks ago when out running the boat I noticed that the port engine was running at only 6500rpm at WOT, while the starboard engine was running at 8200 rpm per the gauge. The engine would start first crank and idle smooth, throttle response was immediate and rpm climbed smoothly up until it hit 6500 rpm and stopped.
I scoured Jetboaters.net looking for a solution.
Some threads had me checking the throttle linkage to see it they weren't hitting the stops, but that wasn't my issue.
I then checked the oil and noticed my port engine was about a quart low, while the starboard was at the proper level. So I was losing some oil somewhere.
I added a quart and went back out for a quick run, with no improvement in RPM.
Came back in and checked the air filters... they were clean. Then pulled the intake and noticed oily residue on the throttle body... I cleaned the intake. The other throttle body on the starboard engine was clean. I pulled the spark plugs to inspect them, but they didn't appear too bad to me to be honest. Out of an abundance of caution though, and trying to eliminate all possible issues, I replaced them. I wasn't hopeful to be honest, but when I left the jetty the second time and opened her up... yeehaw! I was back to 8200 rpm on both tachs... so that solved the performance issue.
Now my question.... I'm losing oil somewhere and it appears in may be getting cycled through the throttle body into the engine and slowly fouling the spark plugs. Do we have a PCV system on these engines? Is there a common failure mode I need to be looking for and any parts I need to replace? I really don't want to pull my boat and have it sit at the dealers for a few weeks to replace something I can probably do in a an hour on the boat lift. Any suggestions are greatly appreciated.
I'm just glad its back on the water in prep for the Memorial day weekend coming up...
I have a 2011 AR210 with ~ 100 hrs on the engines and a few weeks ago when out running the boat I noticed that the port engine was running at only 6500rpm at WOT, while the starboard engine was running at 8200 rpm per the gauge. The engine would start first crank and idle smooth, throttle response was immediate and rpm climbed smoothly up until it hit 6500 rpm and stopped.
I scoured Jetboaters.net looking for a solution.
Some threads had me checking the throttle linkage to see it they weren't hitting the stops, but that wasn't my issue.
I then checked the oil and noticed my port engine was about a quart low, while the starboard was at the proper level. So I was losing some oil somewhere.
I added a quart and went back out for a quick run, with no improvement in RPM.
Came back in and checked the air filters... they were clean. Then pulled the intake and noticed oily residue on the throttle body... I cleaned the intake. The other throttle body on the starboard engine was clean. I pulled the spark plugs to inspect them, but they didn't appear too bad to me to be honest. Out of an abundance of caution though, and trying to eliminate all possible issues, I replaced them. I wasn't hopeful to be honest, but when I left the jetty the second time and opened her up... yeehaw! I was back to 8200 rpm on both tachs... so that solved the performance issue.
Now my question.... I'm losing oil somewhere and it appears in may be getting cycled through the throttle body into the engine and slowly fouling the spark plugs. Do we have a PCV system on these engines? Is there a common failure mode I need to be looking for and any parts I need to replace? I really don't want to pull my boat and have it sit at the dealers for a few weeks to replace something I can probably do in a an hour on the boat lift. Any suggestions are greatly appreciated.
I'm just glad its back on the water in prep for the Memorial day weekend coming up...
