De-carbing

[J BLANK]

This forum has been a lot of help and i might seem a little simple minded,but what is the best way to de-carb.I purchased a 115 hp Marina 1988 or 1989 model inline 6 cylinder with very low hours.Since it had been setting up for over a period of 3-4 years i thought it needed the carb's cleaned. I tried running it first after replacing the water pump and the spark plugs and it ran fine out of the water but would not plain out in the water and seem like it was running only 1/4 throdle. Can i try DE-CARBING? I appreciate any response and suggestions.<br /><br /> jimmy fish

 

[tashasdaddy]

Re: De-carbing

yes you can it might help. have you checked spark, and compression. inline 6's can sound ok on muffs, and still be missing. i afraid you are in for a correct carb cleaning with rebuild kits, and a linc & sinc. CLAMS has a good post on linc & sinc

 

[J BLANK]

Re: De-carbing

i just decided to have them rebuild. I hope that will correct the problem. As i was writing this my buddy called and said that the bottom carb was full of jell and that might have been my problem but he was going to clean and rebuild anyway.<br /><br /> I do appreciate your help<br /> jim

 

[J BLANK]

Re: De-carbing

What are you referring to when you say linc & sinc?

 

[AMD Rules]

Re: De-carbing

Jimmy, look here:<br /><br />Topic: Timing and Sync of Merc Inlines (to 1988)

 

[J BLANK]

Re: De-carbing

THANKS "ADM RULES", YOU WERE A GREAT HELP. I WILL LET YOU KNOW MY RESULTS.

 

[J BLANK]

Re: De-carbing

sorry i haven't been able to get back but i've been out of town. i'm still not haviing any luck on my 115 hp motor.i wanted to ask does anyone think i might be over proped. i put this motor on a larger boat and it had a 24 pitch 3 blade prop on it and i put my 24 pitch 4 blade on it. it came off a 16' boat and mine is about 17'6", i guess i'm just reaching here but i've tried so much i'm just about out of things to do. someone told me that the high side of the stator or power packs might have gone out since it idols so well but won't open up. last time i tried i choked it and it stalled it down. i'm on vacation next week and i'm really trying to get it running but not having much luck. any help or suggestions are appreciated.

jim

 

[fishingdan]

Re: De-carbing

Have you done a compression test? Always start there. You can rent or buy a compression tester and perform the test in less than 30 minutes.

Then check spark. An inexpensive spark tester can be found at the auto part chain stores for less than $10.

Then the fuel system. Any engine that has been sitting with fuel in it will need its carbs cleaned.

Then optimize (props, engine height, etc.)

 

[canadian_fisher]

Re: De-carbing

JBLANK,

I wouldn't be playing with Prop pitch until you have that motor up and running properly. You'll need to read maximum RPMs on your Tach before making decisions on Prop sizes. Check your manual but I believe your 115 runs from 4500-5500 RPM at WOT.
Once you get that engine purring again, you can start working on prop performance.

Good luck ...... CF

 

[J BLANK]

Re: De-carbing

Thanks guys, i have allready had the carb's off and rebuilt, have done a compression check and it's okay also that's why i am thinking it's a power pack. The power pack is what the plug wires run to, correct?

 

[ricksrster]

Re: De-carbing

if you want to check the Ohms of your stator, you should have 5800 - 700 Ohms between the Blue and Ground and the Blue/white and ground. 135 - 165 Ohms between the red and ground and the red/white an ground.