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My 1986 150 has beening over heating off and on for the last 2 years. Put a water pump kit in it the beginning each spring. I took the spark plugs out and looked at the top of the pistons. One side looks to be too clean. It also will start blowing steam from the pee hole. Compression(119psi) on...

I have a 1986 150 Black max. I believe the foot needs rebuilding. I can get a foot off a 1991 150 Force by Mercury. Will these interchange?

I have an 1983 90 hp inline six that shows a spark to the plugs one day and the next day has no spark. I can get the coils, switch box and stator from someone, but his motor is a 1996 xr4.Will these parts interchange?

I bought a project boat with a friend. We have been working on it off and on togeather. The last couple of weeks I have been unable to work on it. He was trying to check the compression and did not ground the spark plug wires. He now tells me the motor has no spark to the plugs. this is a 1983...

What are some of the symptoms of a bad reed valve? A 1983 90 hp six cylinder will increase revs up and then back down to normal without moving the throttle.

While trying to adjust the timing and the carbs on a 1983 90 hp the motor started to rev up and would not shut off after the switch was turned to the off position. Pulling the gas line was how we got it to shut off. We notice the it stopped peeing before it stopped. Any ideas why the motor kelpt...

I found an old boat(1983) that has not been in the water since 2008. The motor crank with a little work and sounded ok considering the carbs. What are some things I should check on the fiberglass hull?

I was helping someone replace a water plump on a 1983 90 hp when we were puting the foot back on we noticed a small hole at the upper end of the foot leaking oil. Is this normal or is it a sign of trouble?

I have bought a 1983 Venture bass boat for a winter project. I am familar with motors but not hull and body work. The boat seem to be in good condition except the floor seems to be a little weak when you stand on it. I am thinking of adding some epoxy or maybe building it up with fiberglass...

I just bought a boat and i am having trouble getting it in my name.I am looking for a identification number or (vin). This is a Venture boat last used in 2007. I have the control number on the tag,but it does not help. Where is the identification number on this boat?

I have a problem with my 1986 150 hp overheating. 2 years ago it only ran hot at low rpms and cooled at high rpms. Replaced the stats(which I found it did not have), poppet valve, and waterpump last May. Last summer it would start to pee for about 5 min. and then stop peeing and steam starts to...

What will happen if I run a 150(v6) without therostats?

Having trouble overheating under 2500 rpm. the water pressure was showing 8-10 psi at wot. Replaced the water pump put new gaskets on the poppet valve but did not replace the spring in the poppet valve. Replaced the exhaust manifold gasket thinking a leak was causing the over heating problem...

I estimate I am only getting about 3 to four mpg driving half to wot.Stopping and starting for short fishing time. I wonder how other boaters with the the same motor perform on mpg. This is a 86 150 rx4 pushing an 18 foot ranger 350v

I replaced the votage regulator on a 1986 RX4 last year. The tach started working and the battery stayed charged most of the time. Someone tolded me there were a regulator and a rectifier on the 1986 150. If this is right where is the rectifier located on the motor?

I the replaced the voltage regulator on a 1986 RX4 last year. The tach started working and the battery stayed charged most of the time.I might need to charge it once in a while. Someone told me there were a regulator and a recitfier on the motor.If this is right where is the recitifier located?

I have a 1986 150 that bogs down after the first start of the morning. This bog will last from 10 to 15 minutes then it will run normally for the rest of the day. It only does this on the first crank of the day. The manual tell nothing about this problem. Just rebuilt the carbs thinking this...

When removing the cover of the poppett valve I found what appears to be an old gas hose cut to about 1 to 2 inches with a bolt pushed in the middle which seems to block water from entering into a hole. This was located to the left of the main assembly. I can not find anything in the manual about...

Will carbs from a 93 xr2 (2.2 small block) work on a 1986 xr4?

Which manual would be the best for a 1986 Mercury 150