360 Chrysler running like crap cont...

Engines, Shafts, Steering, Struts, Rudders, etc.
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bill
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Location: Grosse Ile MI

Re: 360 Chrysler running like crap cont...

Postby bill » Mon May 21, 2018 7:20 am

BigM
My last write up on this 4 year on going problem. Finally put this post to bed. :!:

Last fall I replaced the wire going from the ignition switch to the ballast resistor with a new 14 gauge tinned marine grade wire. I followed the orginal wireing harnes and tyraped and taped the new wire to the existing harness with no splices. Took it out for a run and everything seemed ok. Topped off the fuel tanks and pulled boat and winterized it for the winter. Our club has its own fuel dock with 90 octane and no ethanol added too the fuel.

This spring I replaced spark plug wires and plugs. I used wires for a 1975 Chrysler 360 Truck engine and Autolite plugs. These are the wires that go from the distributor to the plugs along side the valve covers. Makes for a neater looking engine. I did notice the new wires were a lot shorter than the old wires that went under the manifolds almost laying in the bilge. :shock: Posible the old longer wires were causing to much resistance. :o I did notice that the old plugs looked like the were starting to foul. :?

This spring after launching both engines started up and ran really well. That is until the port engine stalled and would not restart. After troubleshooting I found the port fuel tank had somehow collect water over the winter. :?: This boat has two 125 gallon fuel tanks. :roll: So after removing two gallons of water from this tank and pulling the top off the carb to remove the water from the bowls. Reassemble the carb and restarted the engine I took it out for a cruise bow up I remove about an additional pint of water from that port tank.

The real test was the past weekends trip to Put in Bay OH. 70 miles round trip. We cruised at 2800 rpms and 19 mph and average 1 gallon a mile. The engines did not sputter or bog down. They purred. :D

Good night Sweet dreams. :D

bill
Last edited by bill on Mon May 28, 2018 8:20 am, edited 1 time in total.
ALUMINATION
Grosse Ile MI
Located on LakeErie
37' F/B Sedan
1975
Twin 360 Chrysler Marine
Raw water cooled
Hydraulic steering both helms
USCG Master Lic. Retired

Third Owner bill

Fastjeff
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Re: 360 Chrysler running like crap cont...

Postby Fastjeff » Tue May 22, 2018 6:01 am

Glad to hear that. I fought a starting issue on Mr. Port for 8 years and never cured it, so I appreciate your achievement.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

railrunner04
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Re: 360 Chrysler running like crap cont...

Postby railrunner04 » Thu Jun 14, 2018 8:20 pm

:lol: Forgot to mention that's holy water I poured in the tank while you were in Florida seems like it worked hope you dont mind :!:
Moby Rick
FYC grosse ile mich
32ft F/B express
1971
T/318 Chrysler marine

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bill
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Re: 360 Chrysler running like crap cont...

Postby bill » Sun Aug 11, 2019 8:58 am

BigM
My final entry for this post.
I found this gentleman.
My problems were solved.

https:carburetorsandmore.com

Take a look at his website.

Look at his YouTube videos

My problem was the mechanical fuel pumps were over riding the carburetor float needle valves and flooding the engine out. :shock:
I installed Holley 12-804 carburetor fuel low pressure regulators set at 3 psi on both engines and my problem went away. :D
bill
ALUMINATION
Grosse Ile MI
Located on LakeErie
37' F/B Sedan
1975
Twin 360 Chrysler Marine
Raw water cooled
Hydraulic steering both helms
USCG Master Lic. Retired

Third Owner bill

Rlfa83
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Posts: 8
Joined: Mon Nov 06, 2017 8:04 pm

Re: 360 Chrysler running like crap cont...

Postby Rlfa83 » Sun Aug 11, 2019 8:12 pm

bill wrote:BigM
My final entry for this post.
I found this gentleman.
My problems were solved.

https:carburetorsandmore.com

Take a look at his website.

Look at his YouTube videos

My problem was the mechanical fuel pumps were over riding the carburetor float needle valves and flooding the engine out. :shock:
I installed Holley 12-804 carburetor fuel low pressure regulators set at 3 psi on both engines and my problem went away. :D
bill


Bill,
My argument would be. If indeed the pump was overriding the floats. Wouldn't this have been an issue since the beginning of the boat (per say)???
It just seems that it's more of an issue with older set ups that have seen limited use....
'85 Marinette 32' Sedan
Twin Chrysler 360's
Catawba Island. OH

Fastjeff
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Re: 360 Chrysler running like crap cont...

Postby Fastjeff » Mon Aug 12, 2019 5:43 am

Be careful running fuel pressure that low, for you might lean out the motor if, for some reason, you had to 'step on it' hard for a few minutes.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

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tundrarules
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Re: 360 Chrysler running like crap cont...

Postby tundrarules » Tue Aug 13, 2019 8:04 am

Fastjeff wrote:Glad to hear that. I fought a starting issue on Mr. Port for 8 years and never cured it, so I appreciate your achievement.

Jeff

Funny you say this Jeff, I have the same issue with my port engine. Have done all the basics and still takes a long time to wake that engine up after it hasn’t been started for a few days. Likes to backfire a few times and takes a long time to crank. :roll: Guess If Jeff can’t break the mystery, how could I :D
1985 29 Sedan
Edelbrock 1409 carbs
Mallory distributors
Pertronix Flame-Thrower coil & wires
780 hrs/eng
TN River, MM 213.8

:mrgreen: