Re: [OMC-Boats] Replacement Voltage Regulator

From: BLDFW <bldfw@...>
Date: Mon, 31 Aug 2009 07:35:59 -0700 (PDT)

OK....Then let me share my latest symptoms......

Previously I had rebuilt the carb and enjoyed several successful runs back and forth across the lake but as the hour ran on, performance slowly started to denigrate due to poor gas.  I followed that up by cleaning the tank and replacing plug wires.

Since then I've experienced fuel starvation symptons wherein it would get up on plane but then within seconds would die and then be restartable right away and repeat again.  It would run good at lower RPM's but then die as soon as you got her up on plane.  As before, as the hour ran on, performance would denigrate and would get prrogressively harder to start from lack of battery power.  With the lack of apparent charging and being told by the alternator repair company that it was bad, I replaced the alternator with a completely new (not rebuilt) one.

Last weekend, same thing.  It would bog down as the throttle opened.  I was able to get up on plane only briefly once.  I may have contributed to that by changing the idle set screws.  While we were out I noticed the top of the carb was wet so we shut down and I adjusted the float thinking it was allowing too much fuel.  Mistake.  On the way back to the marina I could only get 1500 RPMs max and it would start to bog down.  By the time I got back to the loading ramp it was hard to keep her running. 

When I got home I removed the carb again.  I found a little bit of residual mud in the bottom of the fuel bowl which is believed to have come from the dirty gas on the one run after the rebuild.  I did some prefunctory cleaning.  Gas is running clean and carb is clean.  I readjusted the idle screws by closing them and then backing them out 2.5 turns this time.

Yesterday, I took her out and still encountered problems.  I was able to get up on plane with RPMs up to 3400 before encountering problems.  Without touching the throttle she started to slow down.  I purposes left the throttle alone.  The RPMs slowly started to come down to the point of barely running but it didn't behave as though it were gas related.  It just felt like it was running weaker and weaker.  When it died, I had trouble starting.  I'd turn the key and nothing!  Nada....then a click, then the rattling of the solinoid as you get on a low battery.  Turning the key on and off a few times I was able to get it crank over weakly and she'd start right up again.  That repeated until insufficient power to restart.  I had a rescue buddy hanging with me for that purpose so we tied the boat up behind his house boat and went off to enjoy the afternoon (sans using my boat).

After a couple of hours we tried the key again.  It had sufficient power to crank but I told him to just tow me back to the marina as I'd need what little power might be left to get to the boat ramp.  Sure enough, it started but by the time I idled over to the boat ramp, it would barely run and eventually died with no power to restart.

Here's what I've done thus far:
-- New battery
-- New plugs, points, condenser.
-- New plug wires (checked and rechecked multple times)
-- New alternator
-- Dismantled, soaked and cleaned carb
-- Removed, dumped and cleaned fuel tank
-- New fuel filter (still showing clean with not particulates)
-- Timing is set a 5 BTDC per the manual.

Thinks I have not done yet:
-- Voltage Regulator
-- Coil
-- Sell boat.

I'm open to any and all suggestions!

Dallas, TX
1970 Evinrude Explorer - 155 Buick V6 - OMC Sterndrive

--- On Mon, 8/31/09, Lee Shuster <Lee.Shuster@...> wrote:

From: Lee Shuster <Lee.Shuster@...>
Subject: Re: [OMC-Boats] Replacement Voltage Regulator
To: "Evinrude & Johnson Boats of the 1960's and 70's" <>
Date: Monday, August 31, 2009, 8:40 AM

Croos-reference BRP/OMC part No 383440   (Always shown as part of Cooling Group, due to mounting location).   Sierra, and BRP/OMC should all stock these. They are still fairly common at this point.


PS -- These rarely fail. The single most common cause of failure is when owners install and improperly load-switch a dual battery system.

From: omc-boats-bounces@... [] On Behalf Of BLDFW [bldfw@...]
Sent: Sunday, August 30, 2009 8:33 PM
To: omc-boats@...
Subject: [OMC-Boats] Replacement Voltage Regulator

Just checking on a good source for a replacement voltage regulator.

Prestolite VSC-2602E  12y

I'm browsing now so now would be a good time to get a response (Lee, I see you still out there posting away!).   ;-)

Dallas, TX
1970 Evinrude Explorer - 155 Buick V6 - OMC Sterndrive

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