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| Anybody out there familar with Chrysl... |
| Author |
Message |
    
Johnny
| | Posted on Wednesday, February 05, 2003 - 09:09 am: | 
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I have a 1969 25' Luhrs Sportfisherman with a single 225hp 318 chrysler(rebuilt 2000)new carb,fuel tanks,filters,water seperator,fuel shutoff valves.
Problem:
The boat gets up okay but just at point of plane 2700-3000 r.p.m's it bogs down like it is starving for fuel,pops and pings till the point of almost stalling until it is throttled down.
Idle's okay problem occurs when under heavy load.
Any ideas? |
donwhite
| | Posted on Wednesday, February 05, 2003 - 09:23 am: |
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Jetting!
May I theorize, as I have never encountered the problem you relate, me using ordinary marine engines, ie, Keikhaufers, etc.
Suppose we assign a value of 100 to the resistance
of your boat in the water. Until it rises onto the
step or "planes" at which time the resistance falls to 70.
The engine demand to turn the properller at a given rpm is thereby reduced. Normal automobile carbs are not confronted with this "plane" effect. In the auto application more speed requires more power, fairly proportional. Well, rolling resistance is directly and wind resistance is according to the square of velocity, but basically at speeds we drive, it is proportional.
My conclusion is the reduced power demand on the engine, yet your desire to maintain propeller speed, "bumfuzzles" the carb jets and therefore, you need "marine" jetting.
Just a thought. I enjoy reading this board.
Don White, Louisville, Ky. |
olarry
| | Posted on Wednesday, February 05, 2003 - 01:30 pm: |
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Johnny I think you allready nailed it.Your not getting enough fuel flow.Try to get a fuel preasure gauge plumed into the line before the carb and see if the preasure disappears when it acts up. |
Kevin
| | Posted on Monday, March 29, 2004 - 12:33 pm: |
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Sounds to me like you have a partially blocked fuel pick up in the fuel tank. I just corrected a similar problem on my 76 luhrs by replacing the strainers on the ends of the fuel pickups in both tanks. since doing that I have not experienced any problems. |
Mink
| | Posted on Wednesday, June 30, 2004 - 01:31 pm: |
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I have 318's in my boat and had a problem like yours with the ping and pop. I replaced the vacumm advance springs under the plate in the distributor. It cost me $7.00 per kit. Good Luck |
Jerry Weaver
Visitor
| | Posted on Monday, July 12, 2004 - 10:53 am: |
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I have a 23 ft Uniflite with a 360 Chrysler. The engine was overheating so we replaced the marine manifolds as the old ones were about 15 years old. Since installing the new manifolds, I have no heating problems, but am unable to get the boat up pass 2100 RPM's. Have replace plugs, wiring, coil, balast resister, doist pick-up coil and checked the advance weights for free movement and good springs. Also, tried a different carb. Have good fuel flow. I can turn the prop shaft by hand and have put new packing in the shaft log. Anybody have any ideals before I pull the plug. |
K. Kohlmeyer
Visitor
| | Posted on Tuesday, July 27, 2004 - 02:50 pm: |
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I have a 37' Egg Harbor In S. Jersey. Needs a motor. Needs alot of work. Want to find buyer or 360 chrysler inboard motor. I have limited boat knowledge and don't know where or who to find mechanical help in S. Jersey. Any help or info would be greatly appreciated. |
sam_i_am
New member
Username: sam_i_am
Post Number: 1
Registered: 06-2007
| | Posted on Sunday, June 10, 2007 - 01:12 pm: |
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Johnny, Jerry W, and K. Kohlmeyer,
Anybody found any resolutions to these problems?
I have a client with similar issues on the starboard 318.
Thx,
Sam.
By the way,
This is a great message board with lots of info. Great job everyone!!!  |
andrew
Moderator
Username: andrew
Post Number: 882
Registered: 11-2001
| | Posted on Sunday, June 10, 2007 - 07:08 pm: |
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Sam,
You can also Chrysler category on the board at MarineEngine.com, . There might be more regulars that are familiar with the Chrysler 318.
This site is mostly for the older style one-lung engines... |
1rustyfan
New member
Username: 1rustyfan
Post Number: 1
Registered: 07-2009
| | Posted on Monday, July 06, 2009 - 09:32 am: |
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Has anyone suggested water in the fuel? I had this problem boat idled perfect in and out of the water but when I tried throtle it it would bog down spit and sputter spent 3 weeks tring to figure it out. Someone told me to drain the tank put fresh fuel in, with no further adjustments it ran perfect. |
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