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Hello everyone,

I installed the new exhaust riser (from Catalina Direct) and the problem is solved/all is good.

The boat revs even higher now in gear - 3000 - with my 15x10 flexofold - whereas before it went only to 2850/2900.  Interestingly, maybe this riser is a bit less restrictive.  I did note that the raw water nipple doesn't extend as far into the exhaust pipe on this version.

Thanks for all your comments/help.

Kurt

Bingo.   Just pulled hump hose and exhaust riser is blocked right in front of the place where raw water injects. 

Time to pull the 6 year old riser and either clean or get a new one.

Thanks again for everyone's help.

Kurt

Ken,

Breather tube runs down to oil absorbing pad under engine.  Silver dollar sized black mark to where the tube blows.  Oil engine level was perfect when I checked it when this symptom first arose.

At this point, I think I will check exhaust, then check injectors, then replace injectors or then have someone replace/rebuild injection pump...

Kurt

Thanks Ron and Ken.  That is on the next steps list.  Did some more symptom checking though today. 

Boat idles to 3100 fine.  Reverse at dock 2400 max and fuel in exhaust as before.  Removed k&n airfilter - no impact to symptoms.  Screwdriver to ear on the 3 injectors and they all sound the same.  Noticed air filter was black with what appears to be oil or fuel.  Was red not too long ago.  Now thinking exhaust may be restricted causing too much back pressure as another potential cause?  Elbow is only 6 years old - muffler and exhaust hose original.  But cooling water seems to come out the back fine.  Or does fuel in an air filter also arise with any cause of unburnt fuel including injectors?  Maybe I am grasping at straws. 

Kurt

Haven't done any diagnostics yet - just observing symptoms.  Besides a bit of gray smoke, all seems normal at start and cruise rpm of 2200 which is making me scratch my head.  I will check injectors and cylinder firing as suggested here soon and will update.  Thanks for everyone's advice/thoughts.  Kurt

Thanks for the comments everyone.  A new datapoint - my boat use to rev to 2850 per meter on boat.  Now it can only go to 2400 and then I see the unburnt fuel pouring out via the exhaust.  At cruising rpm of 2200, maybe a bit of gray smoke but power output seems fine.  Forgot to check the idle max rpm.  Still thinking fuel issue - maybe the high pressure fuel pump?  Kurt

Hello Stu,

I guess I sail a bit too much (and motor a bit too little.) 

I started the boat yesterday and upon startup saw some black come out of the exhaust initially creating a bit of a black sheen on the surface of the water, then idled fine.  Lately though I see the smoke and black injected into the water only after the boat is well warmed up.  Am starting to think it is showing the symptoms of being slightly overpropped - I get to 2800 rpm max, flexofold 3 blade 10x15.  Next time out will try to examine the situation more closely at varying rpm levels.    Thanks for the advice/thoughts.

Kurt

My '88 (1300 hours) has just recently begun giving off some smoke and I noticed looking behind the boat that fuel is coming out of the exhaust. I can see the black fuel in the water.   Boat starts fine, runs fine and is not overheating.  (I've previously sorted out the hx and am pretty sure that is not an issue.)

Should I just replace the injectors?  Check the valves for adjustment?  (Or hire a mechanic to further diagnose.)

Any insight appreciated.

Kurt

Here is an inflatable one:

http://marine.the-justgroup.com/

Thanks.

This is an updated rule set:  http://norcalorc.org/sites/default/files/NCORC%20Minimum%20Offshore%20Requirements%201.06.pdf 

At least one permanently installed manual bilge pump with capacity of at least 10 gallons per minute operable with cabin closed.

Definitely looks like one needs to be careful using any below (at any time) the water-line through hulls.

Kurt

Hi Kevin - Northern California minimum equipment standards for ocean racing require a permanently installed manual bilge pump of > 10 gpm operable inside the cabin.  Kurt

I'm investigating installing a second manual bilge pump that can be pumped from inside the cabin.   Probably will get the Whale Titan so that I can use same repair kit on the bilge pump near wheel.

I'd like to avoid boring another through-hull into my boat so am considering re-using the galley sink through-hull or one of the two existing bilge pump through-hulls.  All would be T'd and looped accordingly to ensure no cross or back-flow.

Anyone have any experience setting up a second manual pump inside cabin?  Where did you mount the pump?   

Thanks for your thoughts.

Kurt

Hello everyone,

Been testing out my DSC/AIS radio (Standard Horizion 2100) with a masthead antenna specifically issuing position requests and position reports.  9 times out of 10 the receiver deems the channel (70) as busy and holds DSC transmission until the channel is no longer so.  Most of the time this takes less than a minute but sometimes more.  When I listen to channel 70 directly, typical non-digital white noise is in the background but it is difficult to squelch it out at any levels lower than max and even then oftent times this does not do the trick.    I also have a handheld DSC radio and this does not show similar behavior.

Location is SF Bay area and thus a busy area.  I can't find a local vs. distance sensitivity control on the radio and manual doesn't seem to note one. 

Is this normal DSC radio behavior?  Obviously, connecting the dots I am a bit concerned that if one ever needs to press the DSC emergency button and the "channel busy" hangs the transmission for minutes... 

Thx,

Kurt

I upgraded to AIS with the SH2100 and added a Brookhouse Imux to broadcast via wifi AIS to my iPad where I run iNavX chartplotting software which visually displays all the AIS targets.  Alarming is still managed by the radio.  I am impressed by the Brookhouse devices and how dialed in there standard mux capabilities are.  I would highly recommend them.  Both Brookhouse and iNavx where very responsive to my email queries.

I believe the mux is needed only where slower baud rate gps data needs to be combined with a faster baud rate for ais streams.  In my case a garmin 276c gps data is muxed with the sh2100 ais data and then broadcasted over wifi to the ipad.  (276c can't display high spead nmea data)  Since your plotter already has a gps signal I don't think a mux is required either.  One other advantage of a mux is that if a gps/plotter were to fail a mux can automatically default to a secondary gps which in my case is the iPad.  Again, brookhouse had this all configured in their standard setup.

Kurt

Hello everyone,  Thank you very much for your help and numbers on this one.   For the current time have decided to stay with the single 7/8" wire reinforce hose which will run from pump to hx.  Will watch it closely for fraying and go to the gates hose with elbow approach  noted here if so.  Photo attached fyi.  Thanks again, Kurt