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Tracking down 3k rpm wall...
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tr_guy79
#1 Posted : Saturday, May 07, 2011 8:56:47 PM(UTC)
tr_guy79

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I need to track down the 3k rpm wall I was hitting today.

Conditions were:

60 gallons fuel
flat water
no tabs
650lbs of people in cockpit
Empty water tank.

I am also getting an off idle bog, and am not sure the secondaries are opening.

My thoughts are:

Move accel pump to closest hole
Check / Set timing to 10btdc
Check dist. springs (how?)
Check total timing adv (how?)

Any other thoughts?

-Shane
"McKenna Renee"
1972 '32 FB Express. Twin 318 / Edelbrock 1409s
Chesapeake City Md (Upper Bay / C&D Canal)
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cap'n Brent
#2 Posted : Sunday, May 08, 2011 7:29:48 AM(UTC)
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Try putting water in water tank ads weight but helps level out. Lake Erie gets a bit rough every now and then I need all the ballast I can get
HP Chadwick bay Sunset Bay lake Erie NY boat name Sunrise 32' f/b fisherman chry 318 twin blue bastards,28'express singel 318
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fastjeff
#3 Posted : Sunday, May 08, 2011 11:20:57 AM(UTC)
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"Move accel pump to closest hole"

Right!

"Check / Set timing to 10btdc"

No. Set it at the side of the timing arrow.

"Check dist. springs (how?)"

Remove cap and flip the rotor to see if it springs right back. If it doesn't remove the rotor, put a few drops of oil on the felt pad below it, then re-install the rotor. Next, flip the rotor by hand for at least FIVE minutes before putting the cap back on.

Note: If the rotor is sticking DON'T time time it until it's fixed!


"Check total timing adv (how?)"

You need an advancing timing light. You can borrow one from Auto Zone on Rt 400, near the 7/Eleven.

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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tr_guy79
#4 Posted : Sunday, May 08, 2011 11:15:19 PM(UTC)
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Which side or the timing arrow?
"McKenna Renee"
1972 '32 FB Express. Twin 318 / Edelbrock 1409s
Chesapeake City Md (Upper Bay / C&D Canal)
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fastjeff
#5 Posted : Monday, May 09, 2011 6:22:18 AM(UTC)
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The side for that engine! Just being serious....

One side of the arrow is for normal rotation, the other side for reverse rotators. Since I too never know which, I rotate the distributor by hand and listen to the motor. If it speeds up, I advanced it (or visa-versa). THAT tells me which way spark advance and which side of the arrow to use.

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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tr_guy79
#6 Posted : Monday, May 09, 2011 9:20:36 AM(UTC)
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If my brain is working right, since the port engine spins CCW (left engine, left rotation), then the spark occuring before tdc would be to the right side of the arrow? No?

-Shane
"McKenna Renee"
1972 '32 FB Express. Twin 318 / Edelbrock 1409s
Chesapeake City Md (Upper Bay / C&D Canal)
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Barkleydave
#7 Posted : Monday, May 09, 2011 12:45:04 PM(UTC)
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Sounds right but Jeff is correct. move in direction of increased RPMs.

If it is set ATDC it will not run or idle hardly at all. It will stumble terribly.


dave
None
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tundrarules
#8 Posted : Saturday, June 25, 2011 5:32:09 PM(UTC)
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Did you ever get past 3000 RPMs?

If so, what did you find?Think





.
1985 Marinette 29 Sedan bridge
Twin 318s, 660 hours
New Edelbrock 1409 carbs (working like a charm)
Original Electronic Ignition, Blaster 2 coils, 90 deg plug wire universal kit cut to fit
Raw water system
Freshwater always
Located Pickwick Lake, TN,MS,AL

RETRO BOATS ARE COOL

If the guys on this forum take their time to help you, have the courtesy to update your thread with the resolution.
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