do you think

[ejm845]

do you think that after a compression test on a 1989- 85 hp force produced 110 psi on all 3 cilinders I ,replaced ,stater, dc boxes, triger,rebuilt fuel pump ,rebuilt carbs,changed plugs to a hoter plug and i still have to prime carbs with starting fluid to get it to start when cold my next move is a high cranking amp battery it has a deep cycle 650 amp battery in it now witch seems to turn it ok does anyone have any ideas thanks in advance

 

[steelespike]

Re: do you think

My guess is the choke is not closing correctly.
Have you observed the action of the choke If it appear to close correctly and still refuses to start when cold then there must be a blocked passage in the carb (s).
Or something is adjusted wrong. Soak it good and blow out all passages.Be sure to squeeze the primer bulb till firm before starting.Don't use starter fluid.Very carefully use fuel mix.Don't run a hotter plug unless it is reccomended.

 

[JUSTINTIME]

Re: do you think

replace the deep cycle, they are not meant for high amp draws

 

[JB]

Re: do you think

I can't count the "rebuilt" carbs I have cleared of left over gunk, ejm. Does your choke work?

NEVER use starting fluid on a 2 stroke. It has no lubricant and it does have ether. Both very bad for 2 strokes. Use premixed fuel.

Go back to the prescribed plug. Going to hotter plugs to solve starting problems is a myth.

Throwing parts at an engine is the least effective and most expensive troubleshooting method known to man.

 

[Matthew A.]

Re: do you think

First thing.... Are you making sure to keep the choke actuated [ignition key pressed IN] until the motor does start. [when it starts]. How does the motor start/run once it's up to temp? If it starts okay at operating temp but not when cold then chances are your troubles are fuel related. Choke not engaging. Loose fuel hose connections or the fuel pump bolts loose. Check the fuel pumps diaphram for tears or incorrect installation in it's housing.


P.S. I am no expert...however, 110 psi compression seems abit low. Have you done a leak down test of the compression?

 

[roscoe]

Re: do you think

Use a starting battery.
Verify choke is operating, and use it.
Pump up the primer bulb.
Correct plugs.
And something that no one has mentioned; Advance throttle to 3/4 before cranking.

 

[Frank Acampora]

Re: do you think

Yup, Roscoe! Right on! Some of those Forces and Chryslers just won't start cold unless you put the throttle in fast idle. Either pull out the handle and advance the lever or press the center button and advance or, if you have an old control, pull out the shift lock-out button and advance the throttle till it stops. Then choke and start.

 

[WillyBWright]

Re: do you think

The chokes on those are very touchy. They all have to close equally. That is adjusted with screw locks on the tie rod. The correct method is to adjust them a paper-thickness away from completely closed. That is adjusted by moving the solenoid up or down in the holder. Adjust the middle carb first, then adjust the others. With the choke fully engages, you should be able to pull a strip of paper between the choke butterfly and the throat with a little drag.

If the solenoid isn't pulling the plunger, it's out of adjustment, or the spring tension of the choke butterfly return springs are too strong. When that happens, I disengage the spring on the middle carb. The springs on the other two will still pull it open.