I have a 1990 Mercury 100hp 2+2 outboard that I have got to idle and purr like a kitten but as when I jump to say to 1500 to 2000 rpms it run fine for about a minute then it backfires through the exhaust about every 15 seconds or so. I have gone through the service manual. TDC line up exactly on...
I have been struggling with this motor to get it running smoothly. I have replaced plugs and wires. I also drained the fuel tank, replaced the fuel filter and water/fuel separator. Also have rebuilt the top two carbs. I have also gone through the link and sync per the service manual. After all...
I am rebuilding the carbs which are 3301-9532's. The question I have the rebuild kits have different needles then what is in the carbs. Even one kit has a different needle then the other. The needles in the carb have a long taper that comes to a point. The new needle have notches then a small...
I am new this motor and still trying to dial it in. One issue was fuel and will need to drain the tank. Anyways the questions I have while doing a link and sync are:
1. What is the best way to ground the plug wires? Anyone have any good diagrams or photos? A really good description will also...
I have a 1990 100hp 2+2. First of all I am new to this large of outboards. I was having an problem with it at low idle. Anyways I went through the service book and did the link and sync. While still having problems I reached down and grabbed the fuel bulb and starting pumping and there was no...
I am looking for a drive shaft for a 1989 9.9hp or 15hp 2-stroke. The part number is 6E7-45501-01-00. The question I have does anyone know if this part is interchangeable with another motor? I know the later Yamaha 4-stroke shafts look very similar in the diagrams and also the earlier Mariners...
I am looking at buying a 2003 DF9.9 that needs a lower unit. Well atleast it will need a new housing because it is broken due to corrosion. Well that is the story the seller is telling me. Anyways I was wonder if anyone knows what years and models are inter changeable with this motor. I am...
I just bought a little boat with an 18hp Mercury electric start long shaft outboard. Atleast the cowling has 18hp on it. But when I go look at a diagrams there is a different carburetor shown.
Here is the numbers I have. For the motor the only ID plate I can find has a serial number of 5861174...
I have a 1989 Mercruiser 470, 165, 3.7L. I have an issue somewhere in my raw water cooling. Right now I have water leaking or should say being forced out the back gasket of the heat exchanger. I pulled the front inlet and there is lots of water going in. I pulled the hose from the power steering...
I went to replace my entire water pump housing and I come to find out my lower unit might have been replace by the previous owner. I took the numbers off of the housing (0C508233) and gave them to the marine shop and they gave me the kit which the white base in the photos came in. As you can see...
1989 19.5 foot Bluewater, 470, 3.7L, 165hp Because I am a cheap bastard and love the challenge to create, I built my own alternator conversion kit for my 470. It actually looks pretty good (not to ghetto like others DIY I have seen). I based it off of an ?Ebay? kit and when all said and done...
From fixing one problem to the start of a new problem. I just got done replacing the exhaust shutters on a motor that probably hasn’t had them in years (see previous post). Anyways I have a 1989 470, 3.7L, 165hp motor that has decided now to backfire, cough and sputter upon shut down. I runs and...
I am curious to know that he effects the exhaust flapper has on the engine timing and performance. My situation is that I have a 1989 470, 3.7L, 165hp. I purchased the boat about 2 years ago and have been fixing/updating the boat and motor since. I believe the previous owner(s) did not know...
I have an 1989 Mercruiser 470, 224, 3.7L. I have been doing a lot of work on this engine over the last year. It seems lately that there is more steam coming out of the exhaust then usually. This is on muffs in my driveway. I have added a video on Youtube. Does this look normal for this motor...
I am trying to trouble shoot my Trim Motor. Last year it started to only click when I pressed up or down and then after a couple of tries the drive would engage and go up and down. Now this year it just stopped working all together. No clicks no nothing when I hit the switch. So I downloaded the...
