I have a 1990 Mercruiser 4.3L V6 (2 barrel Mercarb) that has a fast idle. Sorry, no serial number on hand. At start up it revs at 900 rpm and after running for a minute it goes up to 11 or 1200 rpm. I recently rebuilt the top half of the carb (accelerator pump, float, cleaned out ports and...
I'm replacing a torn exhaust tube bellow on my '91 Mercruiser 4.3 V6. The tube on the lower end of the exhaust elbow had a small tear in it that was leaking water (salt water at that!) on the back of my motor and starter. I bought a new replacement tube made by Sierra and I'm having a helluva...
I'm running a '91 Mercruiser 4.3L V6 hooked up to an Alpha 1. The battery died in the boat about a month ago and I replaced it with a new marine battery from Walmart. The new battery lasted 2 outings before it died also. I ordered a replacement alternator thinking this would fix the problem. The...
I'm running a 1991 4.3 Mercruiser V6 hooked up to an Alpha 1 Gen 1. I recently noticed while running the boat on the muffs that one of the rubber exhaust hoses that connects to the exhaust manifold (I believe these are exhaust bellows?) was leaking and spraying a light amount of water into the...
I'm looking to purchase a fish finder or depth finder for my boat. Ideally want something that will read depth/bottom structure and hopefully temperature as well. This is going on a 20' Larson fish/ski boat.
I'm trying to keep this on a budget and don't want to spend more than $200, would be...
Re: 1991 4.3 V6 Mercruiser need help!
Thanks Bond-O, I watched a few youtube videos on guys replacing fuel pumps on cars, they had to jimmy screwdrivers into the hole to hold up the plunger to keep it in position. Looked like a headache, seeing that my motor is very cramped for space as it is...
I bought a '91 Larson with a 4.3L V6 pushing an Alpha One last week. The hydraulic tilt was broken when I purchased the boat and I have fixed that. New problem: the motor struggles when I rev it above 1200 rpm then dies. The boat had 1/2 tank of gas from last summer in it. I topped it off with...