could a new vro pump cause heat soak

[1 fishing fool]

1997 200 vindicater model#e200stleub everything except electrical was new when i got a rebuilt power head {my old one had a hole in it vro,carbs rebuilt 2 times now plugs wires and plugs flywheel .its been 2 years now.and i fish 3 times a week minnmum.motor runs great as long as i dont stop to fish for more then 5 minutes .if i do my motor will start right up but right after the high idle stops it sometimes dies or will be idling 100 rpm lower then it should.then when i put it in gear it diesif i dont choke it .once i choke about 3 time s it takes off like a bat out of hell.
could this be something wrong with my vro.or could there be something wrong with the power head i got .both are out of warrentyand dont want to spend no more money on it untill i can get it figgured out.. it looks like i got about 1 ounce of oil laying in my breather cover.and sometimes when it starts its smoking way more then normal.
i have advanced the timing as much as i could its ideling about 875.
ive owned evinrudes for about 20 years and never have seen nothing like this.
what really gets me is this started when i got the new power head .it dont matter if its winter time or summer time
i cant get my rebuilder to come to the lake to see it act up .and of corse when i bring it to him its the first start up of the day and its on rabbit ears and he ckecks everything out .and says theres nothing wrong with it
PLEASE CAN SOMEONE HELP ME BEFORE I GET SO MAD AND PUT A BULLET HOLE THRU IT


Modified by 1 fishing fool at 1:42 AM 7/30/2010

[EuropeanAM]

I don't normally chime in on the "J-rudes".... but since you specifically asked me to, I will.

First- a VRO pump cannot "cause" heat soak. It may, however, be AFFECTED by "heat-soak".

It sounds as though one of two things is occuring:

1. Engine is starting (after sitting) in a LEAN (or fuel starved) condition. Pumping the primer bulb FIRM before EACH AND EVERY ENGINE START may improve this condition. You might also try a separate fuel tank and line (such as a 6 gallon portable fuel tank).

2. Engine is starting in a severally "oil rich" condition. One thing you might try to "rule this in, or out" is to loosen the cap on your oil tank after shutting the engine down, then snug it back before starting. In some cases, a heavily pressurized oil tank (due to heat) may force excessive oil through the system (and loosening the cap would lessen the effect). Some may disagree with this scenario.... I point it out only as a "diagnostic measure" (not to be used for everyday use).

[dhagemei]

welcome to johnrude land!

answer #1 and #2 go hand in hand; that is, a fuel restriction on vro equpped engines causes over oiling.

As far as heat soak, omc did have a bulletin out on drilling out some of the intermediate holes in the plastic MINLON carbs. I will try to find this literature.

i agree with the 6gal temp tank to determine if your boat system is adequate. This is probably why you had a powerhead failure. Thanks, again.

[SEAHORSE]

<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by dhagemei &raquo;</td></tr><tr><td class="quote">

As far as heat soak, omc did have a bulletin out on drilling out some of the intermediate holes in the plastic MINLON carbs. I will try to find this literature.

</td></tr></table>

I doubt that you will find anything about drilling holes in the plastic carbs

[dhagemei]

correct. i believe the welch plug on the aluminum t' body was removed and some of the ports were hand drilled. This came to the evin dealer but cannot remember if it was ever on a bulletin. Regardless , when i search for it and find it I will share it hoping to remedey this problem

[SEAHORSE]

<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by dhagemei &raquo;</td></tr><tr><td class="quote">i believe the welch plug on the aluminum t' body was removed and some of the ports were hand drilled. ...when i search for it and find it I will share it hoping to remedey this problem</td></tr></table>


that was for the '91 and '92 60° motors, 150-175, it wasn't a bulletin, and it does not apply to the motor in question.

[ChampioNman]

<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by 1 fishing fool &raquo;</td></tr><tr><td class="quote"> when i bring it to him its the first start up of the day and its on rabbit ears and he checks everything out .and says theres nothing wrong with it
PLEASE CAN SOMEONE HELP ME BEFORE I GET SO MAD AND PUT A BULLET HOLE THRU IT &lt;br /&gt;&lt;br /&gt;
Modified by 1 fishing fool at 1:42 AM 7/30/2010</td></tr></table>
Timing needs to be set either on the water or in a test tank with the proper test wheel installed. Sounds like the sync n link is off. Sometimes rebuilders will retard timing by as much as 10* so an over zealous customer doesn't get too rambuncious and over rev the motor and blow it up again. Find a different mechanic and have him check it out.