WFO October Tuna

Northeastfshman

I see OJ
Dec 20, 2008
2,319
1,865
113
San Clemente
Name
Brett Weinberg
Boat
Parker 2120SCDV
After 3 months of being down we finally found my engine issue. It was the ISC valve which controls air flow to set the idle speed of the eingine. Never threw a code just trial and error and lots of changed parts. Basically have a new engine at this point lol.

I fished last Friday afternoon for a few hour after work for a test run. We fished near the fleet out of Dana and had fish boiling around the boat for two hours. We managed two bites on 15lb and size 2 hooks and landed one. Good first run and trip.

IMG_5395.JPG



I finally got a full day after 3 months away on Sunday. After seeing the futility of fishing uphill on Friday I decided to head South and look for some fresh fish.


We left in glass calm conditions with 2 great scoops of bait from Dana. We ran downhill and after an hour of running I spotted a huge spread of birds about a mile out. As I approached slowly I saw occasional blow ups so we putted down swell of the fish and I started dumping chum. The fish started blowing up on the chum within a minute and it well full speed. They ate everything. Line size didn't matter for the first hour. We had fish in every direction, right under the boat just insane. You could watch 100 fish chase your bait the instant it hit the water. Truly full speed and great after staring at fish for hours Friday. Best part not another boat for 20 miles. After an hour the fish stopped eating rope and we had to drop down to 20. By 9 my 250 quart cooler was jugged with everything I could fit, about 20 fish. The fish stopped eating bait so I broke out the poppers on the light gear to play catch and release. They went full speed on those and surface iron. Sick sick sick watching yellowfin climbing over each other to eat the plug. By ten we were done and decided to make it an early day. Not the best grade of fish 8-20lbs but a ton of fun.

October,85 and sunny, glass calm, blue water, not a boat for 20 miles. WFO.

Pinch me.

PS Found 2 huge spots of fish on the way back to. Called those out on the radio hopefully someone got on those.

Full numbers of Fish Dope

So happy to have the boat back. IMG_5369.JPG IMG_5381.JPG IMG_5358.JPG IMG_5391.JPG IMG_5390.JPG
 
Last edited:

Iceberg

Jeff
Apr 13, 2007
271
127
43
San Diego
Name
Jeff
Boat
My roommies twin-V catamaran
That's awesome! Especially for October!
 

Tunaslam

I've posted enough I should edit this section
Apr 25, 2003
20,629
6,365
113
73
Diamond Bar, Ca 91765
Name
Cory Visser
Boat
N/A
Way to go guys! What we have all been looking for recently, you had the magic!
 
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P

Paddyman1

Nice work, Brett! Photos with mainland in the background.
Reminds me of last April watching YFT crash on chum within 2 miles of Oceanside Harbor.
 

IrieMitch

Waterman
May 18, 2010
433
99
28
34
Newport Beach, CA
Name
Mitch
Boat
Captain of Fight On! (55 Viking), Thunderbird Sportfishing
Hopefully they start biting like this for more people. Seems like finding them without a lot of traffic has been helping!
 

Willdoggy

Willing Member
Jun 25, 2014
2,091
2,559
113
Chula Vista
Name
IG = WetWillyBiz
Boat
Purr-Sea-Stance: Boston Whaler Montauk 170
Awesome report/day and happy for your fixed engine!
Will
 

Northeastfshman

I see OJ
Dec 20, 2008
2,319
1,865
113
San Clemente
Name
Brett Weinberg
Boat
Parker 2120SCDV
Awesome report/day and happy for your fixed engine!
Will

THANKS! Was some heck of a process.

We had zero codes and nothing to really work with.

At first we thought it was a fuel issue as the boat would run but then sputter out at higher RPM's so we swapped High and Low Pressure Fuel Pumps. Worked great. Thought we fixed it died again the next day.

Figured at this point I had bad gas since it ran for an hour then died again.

Ran it on an Aux tank ran great for an hour ... THAT'S the Issue!

Drained 50 gallons out of my tank refill the boat ... runs great for an hour. Starts sputtering again.

Next stepped we pulled and cleaned the Injectors. That didn't work.

Checked the cylinders we had full compression, full fuel pressure but the engine was backfiring now so we started on electrical

(AGAIN NO CODES)

After some research and calls to Yamaha they were sure it was the voltage regulator... Swapped that ... no good.

(Please keep in mind no Yamaha part is less than $700 and most are $1,200)

Next up was the wiring harness ... swapped that ran great! All done... nope starts sputtering again.

My mechanic starts feeling around the engine and notices the ECU is burning hot to the touch.

I started googling that and found a thread 20 pages long of a guy with the same issues as me. He took all the same steps I had and had the same issues.

15 Pages in he notes his ECU is hot some guy immediately jumps on and says check our ISC Valve had the same issue that was it.

I called my mechanic all excited..he answers and says I think I found it! I started pulling stuff off to see if it made any difference. I pulled the ISC valve and it was running much better.

A week later we put the ISC valve in and it runs GREAT!


Go to go fishing the next morning. Turn the key nothing. Take the cowling off and I see we blew up the starter motor. 3 months of cranking on the thing and it died.

Got that fixed and FINALLY FINALLY got to fish.

Upside the Engine is literally all new ..or at least that's what I told myself when I got the bill.
 

skipjack

Well-Known "Member"
Oct 20, 2004
966
305
63
65
santa maria
Name
skip
Boat
2320 Parker "Donna Marie"
Great report! The ISC valve only controls the idle speed.
Maybe the electric motor (for the ISC) was shorted.
 

Northeastfshman

I see OJ
Dec 20, 2008
2,319
1,865
113
San Clemente
Name
Brett Weinberg
Boat
Parker 2120SCDV
Great report! The ISC valve only controls the idle speed.
Maybe the electric motor (for the ISC) was shorted.

You are correct but once the idle speed is messed up it screws the timing on everything else or at least in my reading that is what I found.

Put 20 hours on the boat since we swapped it runs 100% perfect.
 
Last edited:

Ryan Gay

Member
Jul 31, 2015
229
154
43
69
Oklahoma
Name
Joe Ski
Boat
19.5 deep v cuddy "OUT TO LUNCH"
THANKS! Was some heck of a process.

We had zero codes and nothing to really work with.

At first we thought it was a fuel issue as the boat would run but then sputter out at higher RPM's so we swapped High and Low Pressure Fuel Pumps. Worked great. Thought we fixed it died again the next day.

Figured at this point I had bad gas since it ran for an hour then died again.

Ran it on an Aux tank ran great for an hour ... THAT'S the Issue!

Drained 50 gallons out of my tank refill the boat ... runs great for an hour. Starts sputtering again.

Next stepped we pulled and cleaned the Injectors. That didn't work.

Checked the cylinders we had full compression, full fuel pressure but the engine was backfiring now so we started on electrical

(AGAIN NO CODES)

After some research and calls to Yamaha they were sure it was the voltage regulator... Swapped that ... no good.

(Please keep in mind no Yamaha part is less than $700 and most are $1,200)

Next up was the wiring harness ... swapped that ran great! All done... nope starts sputtering again.

My mechanic starts feeling around the engine and notices the ECU is burning hot to the touch.

I started googling that and found a thread 20 pages long of a guy with the same issues as me. He took all the same steps I had and had the same issues.

15 Pages in he notes his ECU is hot some guy immediately jumps on and says check our ISC Valve had the same issue that was it.

I called my mechanic all excited..he answers and says I think I found it! I started pulling stuff off to see if it made any difference. I pulled the ISC valve and it was running much better.

A week later we put the ISC valve in and it runs GREAT!


Go to go fishing the next morning. Turn the key nothing. Take the cowling off and I see we blew up the starter motor. 3 months of cranking on the thing and it died.

Got that fixed and FINALLY FINALLY got to fish.

Upside the Engine is literally all new ..or at least that's what I told myself when I got the bill.
First let me say congrats for your perseverance. Shows volumes about you.
Being a dealership auto tech (Ford driveability/electronic engine control/electrical systems factory trained) we used to have a saying after someone went thru that nightmare of a diagnosis.
1) Well that's the first thing I woulda checked! Or
2) It would have been referred to as a "shotgun repair". Open the hood and blast it with 3 rounds of 12g 00 buckshot. Replace everything that got hit and that should do it. Or
3) The last part you put on is the only part it really needed.
It was brutal to be an electronic engine control specialist.
For any haters let me say this post is meant for the op to smile with satisfaction with a job done well.
 

Ryan Gay

Member
Jul 31, 2015
229
154
43
69
Oklahoma
Name
Joe Ski
Boat
19.5 deep v cuddy "OUT TO LUNCH"
You are correct but once the idle speed is messed up it screws the timing on everything else or at least in my reading that is what I found.

Put 20 hours on the boat since we swapped it runs 100% perfect.
You have to consider the symptoms. PCM is hot. IAC (idle air control) solenoid works on a duty cycle. Kinda like an a/c compressor being switched on and off continuously. The field coils draw high current. When it becomes shorted it overheats the pcm. Like any computer. Heat=Instability
If you can get extra cool airflow to the pcm, it will live longer.
 
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flyliner

@thereelflyliner
Aug 19, 2007
1,896
2,609
113
Santa Monica
Name
Jonathan
Boat
31' Cabo Express
So awesome you had a trip like that after all those boat issues.

Such a blast when they go stupid like that. I actually prefer that grade of fish when they go wide open. The best part is the hook-set anyway, so when they are smaller grade, you don't have to spend too much time fighting them before you get to hook another!
 

Northeastfshman

I see OJ
Dec 20, 2008
2,319
1,865
113
San Clemente
Name
Brett Weinberg
Boat
Parker 2120SCDV
First let me say congrats for your perseverance. Shows volumes about you.
Being a dealership auto tech (Ford driveability/electronic engine control/electrical systems factory trained) we used to have a saying after someone went thru that nightmare of a diagnosis.
1) Well that's the first thing I woulda checked! Or
2) It would have been referred to as a "shotgun repair". Open the hood and blast it with 3 rounds of 12g 00 buckshot. Replace everything that got hit and that should do it. Or
3) The last part you put on is the only part it really needed.
It was brutal to be an electronic engine control specialist.
For any haters let me say this post is meant for the op to smile with satisfaction with a job done well.


Such a blast when they go stupid like that. I actually prefer that grade of fish when they go wide open. The best part is the hook-set anyway, so when they are smaller grade, you don't have to spend too much time fighting them before you get to hook another![/QUOTE]


Thank you so much Ryan! It's been a long process but I learned A LOT and I'm so happy we got it fixed. I really appreciate the above.

HAHAH So funny Johnathan I saw your post and was kicking myself for running south to avoid everyone vs. further to the West. Congrats again that grade of fish you caught was awesome!
 

Ryan Gay

Member
Jul 31, 2015
229
154
43
69
Oklahoma
Name
Joe Ski
Boat
19.5 deep v cuddy "OUT TO LUNCH"
Thank you so much Ryan! It's been a long process but I learned A LOT and I'm so happy we got it fixed. I really appreciate the above.


At those prices I hope you saved your old parts
 
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Munnster

Member
Sep 17, 2007
414
50
28
Long Beach, CA
Name
Michael Munn
Boat
20 foot, Searay
Thanks for the great report! Glad that you found the issues with your boat motor and got it resolved. Plus, you probably saved a lot of people some heartache with what you discovered as being the problem. Way to slay them too!
 
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makohead1

Member
Nov 23, 2011
183
57
28
Vista Ca U.S.
Name
Ty
Boat
dreamchaser
THANKS! Was some heck of a process.

We had zero codes and nothing to really work with.

At first we thought it was a fuel issue as the boat would run but then sputter out at higher RPM's so we swapped High and Low Pressure Fuel Pumps. Worked great. Thought we fixed it died again the next day.

Figured at this point I had bad gas since it ran for an hour then died again.

Ran it on an Aux tank ran great for an hour ... THAT'S the Issue!

Drained 50 gallons out of my tank refill the boat ... runs great for an hour. Starts sputtering again.

Next stepped we pulled and cleaned the Injectors. That didn't work.

Checked the cylinders we had full compression, full fuel pressure but the engine was backfiring now so we started on electrical

(AGAIN NO CODES)

After some research and calls to Yamaha they were sure it was the voltage regulator... Swapped that ... no good.

(Please keep in mind no Yamaha part is less than $700 and most are $1,200)

Next up was the wiring harness ... swapped that ran great! All done... nope starts sputtering again.

My mechanic starts feeling around the engine and notices the ECU is burning hot to the touch.

I started googling that and found a thread 20 pages long of a guy with the same issues as me. He took all the same steps I had and had the same issues.

15 Pages in he notes his ECU is hot some guy immediately jumps on and says check our ISC Valve had the same issue that was it.

I called my mechanic all excited..he answers and says I think I found it! I started pulling stuff off to see if it made any difference. I pulled the ISC valve and it was running much better.

A week later we put the ISC valve in and it runs GREAT!


Go to go fishing the next morning. Turn the key nothing. Take the cowling off and I see we blew up the starter motor. 3 months of cranking on the thing and it died.

Got that fixed and FINALLY FINALLY got to fish.

Upside the Engine is literally all new ..or at least that's what I told myself when I got the bill.
 

26grumpy

who hooked who
Sep 24, 2006
9,340
3,705
113
Anaheim Hills
Name
Joe
Boat
Freefrom Boats Club
I've been chasing a gremlin for three years, 1998 Johnson parts are cheap, the last cheap part was the one that fixed it. :D

Excellent report Captain!!
 
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wildbunch

MOFO
Oct 11, 2008
641
275
63
Analheim
Name
Bill
Boat
23' "Hardcore"
I've been chasing a gremlin for three years, 1998 Johnson parts are cheap, the last cheap part was the one that fixed it. :D

Excellent report Captain!!
I thought you were chasing a gilligoogan...I am going 1.5 day Friday on O 95....Last call for BFT.You should join KOMBAT CREW for this one...........last call :rockin::rockin::rockin:
 
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Northeastfshman

I see OJ
Dec 20, 2008
2,319
1,865
113
San Clemente
Name
Brett Weinberg
Boat
Parker 2120SCDV
anti siphon valve?
On fuel injected cars it's called an IAC Valve. For some reason on a boat it's called the ISC valve.

An idle air control actuator or idle air control valve (IAC actuator/valve) is a device commonly used in fuel-injected vehicles to control the engine's idling RPM. In carburetted vehicles a similar device known as an idle speed control actuator is used.
 

Northeastfshman

I see OJ
Dec 20, 2008
2,319
1,865
113
San Clemente
Name
Brett Weinberg
Boat
Parker 2120SCDV
I've been chasing a gremlin for three years, 1998 Johnson parts are cheap, the last cheap part was the one that fixed it. :D

Excellent report Captain!!
Wow Joe I didn't know you were still working on your engine. What did the problem end up being???

When I got mine fixed went to fish for the first time and the engine wouldn't crank I just about lost it lol.
 

26grumpy

who hooked who
Sep 24, 2006
9,340
3,705
113
Anaheim Hills
Name
Joe
Boat
Freefrom Boats Club
Wow Joe I didn't know you were still working on your engine. What did the problem end up being???
Fueling.

Last week it ran great to the 181 and back (no fish) but decided to stall at idle speed in forward gear but only inside the 5 mph zone. As if docking isn't challenging enough, now I have to time my stall. LOL