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If this forum is for Mercury 2 Stroke Outboards less than 135 hp then why don’t you put that in the title? It says Mercury Motors.
Thank you joe54 but your advice given to this post and others is...

1989 Mercury Outboard V6 175 Black Max - Serial Number : OB383305

What is the procedure for testing ohm resistance on the two switch boxes using a multimeter? Repair manual covers trigger testing...

Hello, my bass boat has a 1989 Mercury Outboard Blackmax V6 175 hp Serial Number: OB383305. It has 3 carburetors. The fuel pump is the square one which has a ‘pulse hose’ running from the top...

Has anyone tried recharging their bass boat batteries by plugging the onboard charger Into a rechargeable lithium ion power pack? I was thinking about going to something like the Westinghouse igen...

The Lower Unit is a new (Rebuilt).

So, I decided to take the boat into the shop and have the LU pressure tested to see what is causing the gear oil leak. The mechanic said to me that gear oil...

I do have a Water Pressure Guage on the dash of my bass boat. Now that you mentioned it, I have seen the guage needle stutter momentarily when accelerating from starting out to getting up on plane....

I have a 1989 Mercury Black Max 175 hp V6 - Serial Number 0B383305. How can I tell if the Poppet Valve is opening and closing properly?

Another part to check is the nylon plastic tube in the main oil reservoir. Remove the screw on cap (the one that the rubber oil hoses connects to) then pull out the tube and inspect. It has a fine...

I use Mercury Quicksilver OEM parts. Last year I purchased a rebuilt LU from this OEM supplier. Earlier this week when I pulled the LU and disassembled the water pump, there was gear oil all over...

I’m looking to repair/replace the Poppet Valve assembly on my 1989 Mercury Black Max 175 hp V6. Serial Number 0B383305. My factory Mercury Service Manual has nothing on this topic. Nothing in my...

Thanks for responding. I tried the kitchen stove top test as you recommended. First I got the water hot so the t-stats opened up all the way. I used tongs to take them out of the water, then inserted...

I have an earlier year model Mercury Blackmax 175 hp V6 - 1989 - Serial Number: OB383305 with an overheating problem. I pulled the thermostats and took them home and ran a stove top hot water test....

Thanks for the replies. My '89 Merc does not have an alternator like the more later model Motors such as Optimax.
I looked at a parts diagram for an Optimax and they have a little alternator...

My outboard Motor is a 1989 Mercury V6 175 hp Black Max
The Mercury Outboard Service Manual says that the V6 motors
generate 400 volts. No mention of amperage. However, they DO
mention that...

Descriptions about this system seem to always mention the alternator in the outboard as a power source.
How about outboards that don't have alternators and use a magneto/stator to generate electric...

What would be the best wire size awg to run a bow mounted power trim switch to the back of the boat? I'm estimating 20 ft. From what I've read power trims draw 30 amps.

Hi John, Thank You for responding. The 12-13 volt test was on each battery separately. I double checked my battery cable set up for 'In Series' for 24 volt and I got it set up correctly. Using my...

So I'm setting up my new X5 TM (24 volt) with a dual cable Awg 6 which is 20 ft long. I had this cable custom made.
It includes a 50 amp manual circuit breaker. My crossover battery cable is 2 or 4...

I have a 1989 184 DCB and I had to deal with this same problem about five years ago. My set up is two gas tanks, rear is 24 gal and right in front of it is a 18 gal. Both sit directly on top of the...