Wellcraft V20 Community

Wellcraft V20 Community (https://forums.wmpdevserver1.com/community/index.php)
-   Performance (https://forums.wmpdevserver1.com/community/forumdisplay.php?f=15)
-   -   Ok Merc issues (https://forums.wmpdevserver1.com/community/showthread.php?t=10666)

macojoe 11-10-2008 06:48 PM

Will do!! I changed all plugs today, so they are all new now, they were a bit oily and looked old?

This is a response I got from Iboats. I explained all just like I have done here, but I think this guy is wrong as I had this issue long before I went trolling for Tuna. I am going again by th way Wednesday!!

Quote:

You simply have an oil overload.

When this occurs again, immediately pull the plugs and take a hard look at them. I'd be willing to bet that they are seriously oiled to the point that they will NOT fire under a heavy load such as put on the motor at 4500 RPM.

There is also an amount of pure oil in the recirc system, patiently waiting for engine speed to increase sufficiently to get it airborne and burnt off and let the spark plugs burn clean enough for the engine to get up to full power again.

The factory oiling systems lighten the oil mixture at low engine speeds to prevent this oil overload and hesitant throttle after long periods of idling and/or trolling.

Possible cures are;

1. install a small trolling motor and NOT idle the big motor

2. install spark plugs one-step hotter than the factory specified plugs (also, if piston clearance is adequate, change from surface gap to standard electrode or extended electrode plug)

3. if carb'd, readjust idle mixture to leanest idle possible and still not have any hesitation on rapid acceleration in gear.

bigshrimpin 11-10-2008 08:47 PM

MJ - I thought you hadn't run the boat since we went out around wings neck. There were two lil' hicups on take off, but it never hesitated or lost power during the 2 hour run (after we replaced the stator) . . . unless you dropped some roofies in my soda :) and missed something. I anxiously waiting for tomorrow update. Hope all goes well . . . if the Tuna are around . . . I going out this weekend.

Those plugs you showed me today were dripping two stroke motor oil :)

macojoe 11-10-2008 09:22 PM

BS you smoking anything??
I just told you I caught a Tuna last wed, and that I went for a ride in the boat Sunday, so how could the last time I took the boat out be in July with you??

chumbucket 11-10-2008 09:39 PM

He needs to open the door to the shop when he's test running those motors. Breathing too many fumes.

THEFERMANATOR 11-10-2008 11:20 PM

Quote:

Originally Posted by chumbucket (Post 131506)
He needs to open the door to the shop when he's test running those motors. Breathing too many fumes.

Hey now, that 2 stroke smoke be good stuff.

http://i162.photobucket.com/albums/t...trokehorny.jpg

randlemanboater 11-11-2008 01:09 PM

I would think that the "over oilling" would cause problems at idle/slow speeds as well......but I don't know much about them old 2 strokes.

bigshrimpin 11-11-2008 08:55 PM

Quote:

Originally Posted by macojoe (Post 131495)
I think this guy is wrong as I had this issue "long before I went trolling for Tuna."

MJ????

Hey . . . did you get out today? I'm dying to know.

macojoe 11-11-2008 10:02 PM

I am leaving here at 4am, I can't wait!! A guy I know went today and they caught another 150 ponder out there today!

Also yesterday on the Chatam side they caught a 1200 ponder!!!! They say the big ones have been close and that there is at least five 700 ponders this past week!

macojoe 11-12-2008 12:04 PM

Well the bad news first, 6 footers out there wind and waves in are face, after 2 miles turned around and came back in, NO Tuna :cen:

Good news, came in and went out in a different area, drove boat about 15 miles at about 5000 rpm doing any were from 25 to 29 knots Opened it up and topped out at 33 knots, Motor never missed a beat!! Could have trimmed it a bit more and got another mile an hour??

So after putting new plugs, new ck vaule in the fuel pump, and redirecting the supply hoses to the carbs, it works! Not sure what fixed it??

Redistricting the fuel hose was like this, it had one supply hose from the pump, across the motor to the other side and that one hose went to top carb, then from there each carb feed off the one above.
Now there is a 3 way on the pump and a hose going to each carb direct.

So was it the hoses?? Ck Vale? plugs? or a combination of?

But it works!! Thanks all and to BS for stopping by to help me out!

phatdaddy 11-12-2008 04:30 PM

not sure what fixed it, but welcome back to the dark side..

bigshrimpin 11-12-2008 08:08 PM

I am 99% sure I know what was wrong, but as soon as I open my big mouth . . . I'll probably jinx the motor. Basically I believe that it wasn't getting enough fuel at high rpm.

The hose from the merc male plug to the fuel pump is 1/4" ID and it was kinked a bit by a tie wrap. I put that tie wrap on to keep the hose away from the linkage (when it was near full advance). Anyways . . . to make a long story short . . . I had MJ working the throttle while I was watching the linkage near the hose. 1 out of every 5 times the throttle was advanced to near WOT the linkage bumped the hose and kinked it (cutting off the fuel). I rerouted the fuel lines and fittings to the carbs with a old school three way fuel pump nipple. I pulled apart the fuel pump just to look for any shaving on the filter screen and replaced one of the check valves that wasn't very snappy. The motor seems to have like the changes, so I'm happy that MJ's happy and the boat is running well.

I'm pretty sure that's this will one of the final chapters in the MJ motor fiasco series. Well change the poppet valve and rebuild the carbs in the spring . . . just to be safe :)

randlemanboater 11-12-2008 08:32 PM

Glad the Merc ran good for you MJ.

33 knots....thats like 38 mph, not too shabby!

bigshrimpin 11-12-2008 10:50 PM

MJ - I plugged the numbers into the prop calc and your right on the money 5600 - 5800 rpms to get that speed with 2:1 ratio, 15p prop and 12 -15% slip. All you need now is a good tach or an adjustment on that one.

macojoe 11-12-2008 11:19 PM

I need a new one. Also have to get the temp gauge working and a few other small things. We will get there!!

Thanks

THEFERMANATOR 11-12-2008 11:44 PM

Quote:

Originally Posted by bigshrimpin (Post 131611)
MJ - I plugged the numbers into the prop calc and your right on the money 5600 - 5800 rpms to get that speed with 2:1 ratio, 15p prop and 12 -15% slip. All you need now is a good tach or an adjustment on that one.

Did you put a 2:1 on it BS? I thought all of the 2.4L's and 2.5L's were the 1.87:1's?

bigshrimpin 11-13-2008 12:00 AM

yeah - I put the 2:1 on that motor (from a 1991 2.0L 150) so MJ's sea tub could get on a plain better.

THEFERMANATOR 11-13-2008 12:12 AM

Quote:

Originally Posted by bigshrimpin (Post 131619)
yeah - I put the 2:1 on that motor (from a 1991 2.0L 150) so MJ's sea tub could get on a plain better.

GOTCHA! LEt him turn a larger diameter wheel to help heave the hoe.

randlemanboater 11-13-2008 08:23 AM

Dang, you cant beat a CUSTOM made Merc that comes with its own mechanic.

phatdaddy 11-13-2008 09:42 AM

Big Shrimpin has a very good extended warranty policy. well worth it...

THEFERMANATOR 11-13-2008 10:39 AM

Quote:

Originally Posted by phatdaddy (Post 131646)
Big Shrimpin has a very good extended warranty policy. well worth it...


Sounds like a lifetime policy to me.

Skools Out 11-13-2008 10:44 AM

It is a lifetime if he is dealing with MJ lol

macojoe 11-13-2008 12:04 PM

LMFAO!! Your all right! We are hooked for life now, He might as well move in!

chumbucket 11-13-2008 12:46 PM

You guys don't know how right you are! :zip:

macojoe 11-13-2008 01:54 PM

Hey I called you for the third time today and you didn't answer??:cen:

bigshrimpin 11-13-2008 02:02 PM

Quote:

Originally Posted by THEFERMANATOR (Post 131622)
GOTCHA! LEt him turn a larger diameter wheel to help heave the hoe.

MJ found a brand new 15.25" 15P blackmax prop for $50.

chumbucket 11-13-2008 02:29 PM

Quote:

Originally Posted by macojoe (Post 131688)
Hey I called you for the third time today and you didn't answer??:cen:

Didn't want to listen to you ramble on. I fell asleep on your last call. :sleep::nut:

bigshrimpin 11-13-2008 04:09 PM

There's spotty service in the John Hancock building. I'm not sure my employer would be too excited if I were taking calls from the wind-talker on their dime. I'll call you as soon as I set foot outside the building.

phatdaddy 11-13-2008 05:00 PM

Quote:

Originally Posted by macojoe (Post 131688)
Hey I called you for the third time today and you didn't answer??:cen:


thank goodness for caller ID

macojoe 11-13-2008 06:49 PM

BS still thinking I am talking to him!! :clap:

phatdaddy 11-13-2008 08:09 PM

MJ its your heavy use of an indefinite pronoun....

bigshrimpin 11-16-2008 06:09 PM

I see how it is now . . . You only call me when you need something :)

I feel so used :P

macojoe 11-16-2008 06:18 PM

Hahaha

I no see you calling me!! And every time I call its I will call you back and you disappear!!

I am glad CB doesn't treat me like that!

macojoe 11-16-2008 06:22 PM

Just called, "Hi this is Tim" Hmm.... no answer here either :bat:

Steplift 72' 02-15-2009 05:19 PM

Quote:

Originally Posted by bigshrimpin (Post 131369)
MJ - I think it's bogging cause it's not getting the fuel it needs at higher RPM (above 4500). Whether it's the fuel pump, carbs, or some restriction b/w the tank or motor . . . We'll have plenty of time to go through the entire system this winter and replace/rebuild everything. Those motors run HOT at lower speeds, you can add a H20 pressure gauge and a temp gauge to ease you mind. I run snipped tstats during the warm months, so the motor runs colder and pees right away . . . but you can flood the motor when starting (as I showed you almost everytime we went out) Hopefully Spares or Ferm will come along and chime in here.

I vote for the restriction between tank and carb....along with a different winter gasoline formulation. The anti-siphon valve takes a couple ounces of pressure to open the spring.....The butane added in the fall up north, and the south in November causes vapor lock if you happen to have a anti-siphon valve with a slightly stiff spring. I've been there and got the T-shirt....boat would bog down past 4000 rpm and stall if you didn't quickly pull the throttle back. Figuring that one out wasn't cheap or quick.

macojoe 02-15-2009 05:44 PM

Thanks but all these issues have been worked out and it runs like new! Now if i can just get all the ice to melt i be fine!!

Steplift 72' 02-16-2009 04:00 PM

Quote:

Originally Posted by macojoe (Post 136270)
Thanks but all these issues have been worked out and it runs like new! Now if i can just get all the ice to melt i be fine!!

The only ice we worry about around here is in the ice chest. I've seen hail piled up deeper than I've ever seen snow.


All times are GMT -5. The time now is 04:36 PM.

Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.