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I was helping my neighbor repair a shifting issue which turned out to be corrosion between the double O-rings on the shift shaft. The shift shaft was completely removed during the repair and we kind of took a best guess at the height for the reinstallation. I think we are really close because...

I have a 25" mercury 150 engine and a 20" mercury 150 HP parts engine. Same vintage so most parts are interchangeable. I am trying to remove the 5" extension from the 25" engine exhaust tube and it does not seem to move at all. I don't want to break or damage anything, - so what is the trick...

I have been having cooling issues on my 1988 mercury 150hp and have been eliminating issues one by one, but today I came across something I thought was odd and wonder if anyone else has experienced it too. So I dropped the lower unit and hooked up the water muffs to the intakes just to see how...

I had pulled my lower unit yesterday and realized the water tube came out of the upper part of the engine. I was able to feed it back up and get it back in right spot and it will stay there on its own, but it falls out too easily. Has anyone else had this issue? How is the water tube attached...

Can I replace a 1 piece head with a two piece head on similar engines. The heads (2 piece) on my older engine are in better shape than the heads that are on the current engine (1 piece). One shop where I buy parts says it is OK and the other shop says don't do it. (Both shops of course have...

What would cause only one side of an engine to run hot? I have mercury 150hp and the port side runs normal (this side has the temp sensor which sends the signal to the guage). The starboard side runs HOT !! This side houses the sending unit which activates the high temp alarm. I replaced the...

I am wondering what you folks recommend for a sealant in the bolt holes when mounting an engine? My previous engine had a clear silicon type product that seemed to be effective and was fairly easy to remove. I am in the process of buying a new to me (2005 Honda 150) engine and the installer is...

I am in the market for a new to me motor and I have found a Honda 150 4-stroke with low hours for a decent price, but it has a 25" lower unit. I am wondering if anyone has used a jack plate to mount the motor higher on the transom and what the results have been. Is this a good idea? The motor...

As I mentioned in another post, my motor failed in a big way a few months ago. I have ignored it as a coping tool the rest of the fall since I did not fish since the end of September. Anyway, the motor has run flawlessly all year and even the day it failed. After hours of fishing and...

I have a offer / opportunity that I can purchase a 2006 Northcoast 20 with a Suzuki 150 (2006) (4-stroke) for around 12K. My current situation is - I need a motor for my V20 since my 1986 Mariner broke in a big way this past fall. I have been shopping around for rebuilt and used motors and...

When I removed the plug last weekend to check / add fluid to the T/T reservoir, the plug seemed really dried out and the slot and hex are now in such bad shape I need a new plug. This is a part that is no longer available from merc or many other places. I found a place online that had stated...

Has anyone heard of or ever used a product called thermagasket? http://www.rxauto.com/ It's made by Rx Auto It's proclaims to fix a failed head gasket. I have a '99 ford windstar with 128K miles with a bad head gasket. I tried the BARs product which did not work. The cost of the repair...

I am attempting to check and adjust the timing (as needed) of my Mariner 150 with the help of a shop manual and the 1st item is to check and adjust the timing pointer. It describes getting #1 cylinder to TDC with the help of a dial indicator. Then rotating the flywheel ccw until the dial...

I have my engine set to idle around 1K rpm. I had turned it up from 850 rpm since the engine would stall as soon as I shifted into gear. I still have a stalling issue, but not quite as bad. My problem is more shifting from fwd to reverse or reverse to fwd especially trying to get the boat...

I picked up a voltage regultor yesterday. My engine does not currently have a regulator so I can't do the typical method of remove and replace wire for wire. I know I connect the yellow wires to the 2 yellow wires going to the rectifier. My questions are: How and where to connect the 2 red...

I haven't been around here much, but I will be in Norfolk, VA for 2 weeks starting next week and I was wondering if anyone would want to take a yankee from Connecticut out fishing southern style. I can pick up the tab for gas, bait, beer etc. PM for email or cell # Thanks Carl

I was driving in on Saturday after a good day of black seabass fishing with my Dad. The ride in was about 30 minutes at 3500 rpm with no problems. After I was in sheltered water, I went WOT and after about a minute the engine shut down. No alarms - no bad noise - just rpms went to 0 and it...

I was on the ramp this morning ready to splash and the motor would not start - just click - click - click - everytime I turned the key. It started fine last week in the driveway and gave me similar trouble last night, but I attributed it to a battery that probable needs replacing anyway, so I...

I removed the lower unit today to change the water pump and realized that the motor would not turn. I assumed the problem was in the cable so I disconnected the nut from the bracket and the steering wheel turned with no problem. The motor, however does not budge. I greased all the fittings...

I am wondering what all of you think of the current situation off the coast of Somalia with a US citizen being held by pirates and the fact that a US flag ship was attached? Is it another test of our president or just a coincidence?