84 Merc I4 3.0 HP conventional.....Well I need to re-time my engine again it appears I did it wrong. I cannot seem to find a thread I had read corresponding to my engine. I believe it is Serv Manual 6. I need to set the dwell which I know have a meter and I know the advance needs set...
Sorry for the novice question but originally when I bought my boat it had a 1 7/8" ball on it. I already had a 2" ball and tongue for the trailer so I swapped on the trailer to save a few bucks. I now have gotten a smaller truck that will tow twice what my boat's weight is but has a smaller...
Merc I4 140 Mercarb..... I have read in other threads that the choke plate should close when engine is cold and the throttle is pushed forward. I never had this problem until I made carb adjustments after a tune-up. The plate is staying open but also moves freely ( not binding anywhere )...
Merc 140hp I4 just finished installation of lower shift cable and I am trying to determine where brass barrel needs to be. I have the stud on the plastic end guide in the bottom of the slot. I have read six inches from center of nut eye to center of barrel. When would this be achieved if I...
Have some questions on a backfire I am getting. When starting initially I always let it set until it is at operating temp as it says to. I know this is probably not imperative all the time but I do it anyways just to be safe. Well when taking off for the first two or so times I get a backfire...
This is a Merc 3.0 I4 with conventional ign. I had my father-in-law the brilliant mechanic decide to put his two cents in on my motor while I was gone and now the mixture and idle is all messed up. Could someone let me know a place to start to get it back in the right parameters. It is a...
I have a 3.0 litre I4 Merc, I was told that the spark plug gap was changed from .035 to .045 in a Merc bulletin I also read a thread in here that said .030. This is a 1984 conventional ignition could someone tell me what the correct gap should be?
Merc 140 hp I4, I previously adjusted the lower shift cable and had fwd,neutral,rev on muffs. Took if out this past weekend. First time trying to shift out of forward to neutral no shift ( stayed in forward ). Then as the day went on after shutting down engine then putting in neutral....it...
Merc 140hp I4 1984, received an AC Delco remanufactured alternator for free from a buddy that works for Napa. I understand this is not the correct application for this alternator as it is manufactured for a vehicle rather than marine, but it does mount up right. Question on wiring is I have...
My WOT is 4600 with four people ( average amount of people that will be in the boat ) 18' Sylvan open bow, spedometer does not work but guessing in the upper thirty mph range. The prop I have on is extremely chewed up so it is hard to tell if that size is correct. I purchased this boat from...
140 h.p. Mercruiser I4....was out running the boat yesterday and voltage at dash was spiking and dropping erratically. Lights were surging also so I know it is not the guage. Then it just stopped and battery guage will not move even at high speeds telling me I have lost charging system...
Just a quick and simple question on prop size. I have a Merc 140 I4, Sylvan 18ft, open bow. What for generally just cruising not pulling skiers and what not is a good size prop to go with. I have gotten so many distorted opinions being everybody at marinas wants to sell you crap.
I had the boat out all summer last year ran close to excellent. Got it out this spring was very very hard to start. When I did get it running, it was very rough. I throttled up manually just a bit as I heard it is bad to give a lot of gas out of the water on muffs. It then seemed to run out...
I own an '84 Sylvan with an I4 140 HP Merc. I lost reverse and neutral at the end of last year. I have taken off the lower unit and what not. The (lower) shift cable appears to be ok other than at the engine mount. The shift slide looks as far as I can see from pictures to be missing the set...
I have a Merc 140 inline 4. On specs it says at WOT I should be between 4200 and 4600 RPM's. I am right at 4600 and think it is possibly dangerous. I have checked the hub on prop and everything else in that area and see no issues. Any other suggestions?
