What is the point gap for a 140 mercruiser i/o

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port jeff boater

Seaman
Joined
Jul 7, 2002
Messages
50
need some expert advice on the point gap for the 140 merc i/o. manual says .022 but that looks way to wide compared to the old points.. i also took into consideration the wearing down of the points but still the gap looks wider.. the marina salesman where i bought the points said it should be betweeen .017 to .019.. please let me know thanks alot
 
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port jeff boater

Seaman
Joined
Jul 7, 2002
Messages
50
Re: What is the point gap for a 140 mercruiser i/o

ive seen that.. but what serial number are they talking about? my engine serial # starts with a "b" is this lower than what the one listed is? so i should be gapped at .016?? plus do i have a presto dist? its a 1986 fiour winns 140 i/o merc. thanks again all
 
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affa

Petty Officer 2nd Class
Joined
May 20, 2003
Messages
199
Re: What is the point gap for a 140 mercruiser i/o

Hi again<br />The way Ive understood it is that the engines that starts with a letter is newer then those starting with a number, I have the same engine as you, mine starts with an A. I saw this article not long ago, and since my engine is in pieces I havent tried it, but will when I get it togeter again if this is correct(0,40 if I dont remember wrong). I set it at 0,20 when I did it last time, and it run fine. Ive read here that if you dont get it right the manifold and cooling can become hotter, so I really would like to hear what others might have to say!<br />About the presto Im not sure, but I believe that its the one with conventional ignition.<br />Regards<br />Affa
 
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port jeff boater

Seaman
Joined
Jul 7, 2002
Messages
50
Re: What is the point gap for a 140 mercruiser i/o

ok all.. thanks for all your responses.. i finally got her running again.. i changed the gap to .019 and she is still idling at 1500 rpms.. it starts off at that and doesnt kick down,, like the choke isnt opening or closing. when i wasnt able to start it i pushed the linkage up and down from the carb.. would that have anything to do with the rpms staying at the 1500 ...i winterized her by changing the oil n filter, sucking in 5 gallons of antifreeze thru the muffs and then fogged her.. although the engine tried to stall but never did. i finally shut the key off when the last bit of antifreeze was going into the drive. i also drained andd refilled the lower unit oil.. what else is left to do.. thanks again...
 
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