1987 model I6

[1FASTLASER]

HELPPPPPPPPP!!!!! Have done all test on this motor i.e. compression,leakdown etc etc. Hers the problem all the tests where within specs. When I let this motor set be it a day or 2 hrs it is a hassle to start. Carbs have been rebuilt and set correctly. All the plugs show the same color. When i do get it cranked I can run it and it runs super throttle response is top notch. But let it set and start to cool off here we go again have to crank it like crazy to get it fired back up. The only thing that I have noiced that gets it to crank better is to trim it all the way under. If anyone has any ideas PLEASE give me a holler.
1FASTLASER

[Rickracer]

It sounds like it may not be... :cool:

[Georgia Boy]

then I would guess it is not getting gas. This has been discussed alot on the forums, and almost every inline I have had any experience with was the same as to the only way to start a cold inline is basically to flood it. if it gets cold then trim the motor under and pump the fuel bulb until you just start to see a drop or two of fuel drip from the bottom pan. Hold the choke down and it should crank. Good luck ~GB

[Jeff_G]

Your cylinders may be drying out. Re-check the float levels. Check the pump output at idle. You may need to adjust the idle adjustment mixture screw to the rich side 1 1/2 to 2 turns out from lightly seated. Take the mid range air jets out of the tops of the float bowl covers and leave them out.

[Ed Mc.]

'87 ADI has a primer rather than choke, doesn't it??

Have you checked the primer for fuel output when you've depressed the choke button? You should hear the solenoid 'click'. You can manually prime the motor by opening the brass valve on the primer unit.

If you do have choke shutters, check for proper operation; they should close fully and be flat against the carb throat's face. A warped choke plate won't seal properly and could cause hard starting.

As an alternative to choke shutters, pick up a priming unit (doesn't have to be a Merc, either, you could use an OMC unit too) and tie the discharge into the bleed hoses off the intake manifold.

This'll put a direct shot of fuel into the crankcase and she'll light right off.

HTH.............ed

[gaineso]

My 1986 can be hard to start after sitting for awhile. Pump the bulb and then bump the enrichener when you crank. Should fire right up.

[sho305]

If it is like my old '73, you really have to choke it hard. If the motor is tilted forward the gas runs out the carbs instead of back into the motor. It helps mine to have the idle a little richer than it needs to be. I also go back and pump the bulb up again if it does not start in say 5 seconds for a cold start, that seems to help. I did the carbs all up, and can't get them to flood with the bulb. I hold the choke until it fires cold with high idle all the way, but hot it just starts instantly. Half warm I bump the choke if it don't fire right away. I checked my shutters, they have a good seal...but if I get my hands on a primer it is going in there. Of course it only chokes two carbs also.

[Ed Mc.]

A racer acquaintance told me that if you got the correct parts you could add a choke shutter assy & linkage to the 3rd carb and that makes them lite off real good. :cool:

[sho305]

I thought about that, but didn't have parts. Also thought I could take all those covers/grills off the carbs for a fuzz more air flow, and use primers...;)

[gaineso]

That's one thing I like about my '86. The only thing in front of the carbs is the cowl support. I'm still thinking about adding a Holley Red to eliminate the bulb pumping.