Yamaha and Mercury
Moderators: Redneck_Randy, badmoonrising, lakerunner
Re: Yamaha and Mercury
Thanks, there does seem to be a plug in there. It is interesting that both the shop manual and the owners manual say you are supposed to suck the oil out of the dip stick hole. Wonder what that is all about?
1974 Harris
70 HP 4 stroke EFI Yamaha
70 HP 4 stroke EFI Yamaha
Re: Yamaha and Mercury
might mean they didnt think far enuf ahead to make the drain hole drip proof as advanced as these things are some of the drain sites are forgotten it seems.
Re: Yamaha and Mercury
Greg I didn't go deep enough into the manual to see where they were suggesting vacuuming out the oil was the best or preferred way to remove used oil for oil changes.GregF wrote:Thanks, there does seem to be a plug in there. It is interesting that both the shop manual and the owners manual say you are supposed to suck the oil out of the dip stick hole. Wonder what that is all about?
I really don't think that is the case here at least on the Yamaha's. Fact is it's far easier to obtain a clean drainage without any spillage what-so-ever than it was on a Honda I used to have. I've even changed mine on a boat ramp a time or two without spilling a drop into the water. There is a little inside trick to it that works with mine, but Greg's 70 is most likely the same.sprintfan wrote:might mean they didn't think far enough ahead to make the drain hole drip proof as advanced as these things are some of the drain sites are forgotten it seems.
Back to the Honda, I'd never advise or attempt to change oil on the water with it. Even utilizing my best attempts I always had some sort of mess to clean up on the lower unit at the minimum and generally also had mess to clean up on the driveway to boot.
Respect Our Recreational Resources
Leaving Only "The Footprints of Your Passing"
Boating the Muskingum River
1972 35' Crest Pontoon Houseboat
2007 90 hp. Yamaha
Leaving Only "The Footprints of Your Passing"
Boating the Muskingum River
1972 35' Crest Pontoon Houseboat
2007 90 hp. Yamaha
Re: Yamaha and Mercury
Gee whiz info on the computer hookup. There are some guys swearing they are getting this going with a $10 OBDII car cable and an adapter to get to the Yamaha connector (16 pin to 3 wires)
1974 Harris
70 HP 4 stroke EFI Yamaha
70 HP 4 stroke EFI Yamaha
Re: Yamaha and Mercury
More gee whiz info
I got my water gauge going, easy peezy, there is a port for it and a Yamaha part you can order.
I still do not have my oil pressure and water temp gauges hooked up but I did order an extra water pressure adapter. It was exactly what I suspected it would be. It is a 14mm 1.5 pitch to 1/8" NPT pipe bushing with a regular American hose barb screwed in it. Since this whole assembly is about $13 and Teleflex wants more than $40 for the bushing alone, it is a heluva deal.
My next step is to get a 1/8x1/4x1/8 NPT tee, rethread the 1/4" port to 14mm (it is enough bigger that it should work) and move the Yamaha oil pressure sender to the tee, screw in the teleflex sender and screw the whole thing back in the hole with a close nipple and the other adapter I ordered.
That still leaves me with the water temp sender. I suppose I could just drill and tap a 1/8" NPT hole in the manifold but I am a little chicken about that. Telflex support says to use the surface mount bracket with the sender in contact with the head. I had one mounted like that on my 2 stroke Mariner and it did sort of work but it was pretty slow to respond.
I am still looking around at the manifold to be sure there is not a plug on the hot water side that I missed. I still have the 14mm plug I took out for the water pressure port that I could drill and tap to 1/8" pipe if I can find a hole for it. (or just buy another adapter)
The new F70 is doing great. I am out of the break in and running it up a bit more. So far I am doing about 1.8 gallons an hour on fuel.
I got my water gauge going, easy peezy, there is a port for it and a Yamaha part you can order.
I still do not have my oil pressure and water temp gauges hooked up but I did order an extra water pressure adapter. It was exactly what I suspected it would be. It is a 14mm 1.5 pitch to 1/8" NPT pipe bushing with a regular American hose barb screwed in it. Since this whole assembly is about $13 and Teleflex wants more than $40 for the bushing alone, it is a heluva deal.
My next step is to get a 1/8x1/4x1/8 NPT tee, rethread the 1/4" port to 14mm (it is enough bigger that it should work) and move the Yamaha oil pressure sender to the tee, screw in the teleflex sender and screw the whole thing back in the hole with a close nipple and the other adapter I ordered.
That still leaves me with the water temp sender. I suppose I could just drill and tap a 1/8" NPT hole in the manifold but I am a little chicken about that. Telflex support says to use the surface mount bracket with the sender in contact with the head. I had one mounted like that on my 2 stroke Mariner and it did sort of work but it was pretty slow to respond.
I am still looking around at the manifold to be sure there is not a plug on the hot water side that I missed. I still have the 14mm plug I took out for the water pressure port that I could drill and tap to 1/8" pipe if I can find a hole for it. (or just buy another adapter)
The new F70 is doing great. I am out of the break in and running it up a bit more. So far I am doing about 1.8 gallons an hour on fuel.
1974 Harris
70 HP 4 stroke EFI Yamaha
70 HP 4 stroke EFI Yamaha
- Ron Burgundy
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Re: Yamaha and Mercury
GregF wrote:More gee whiz info
I got my water gauge going, easy peezy, there is a port for it and a Yamaha part you can order.
I still do not have my oil pressure and water temp gauges hooked up but I did order an extra water pressure adapter. It was exactly what I suspected it would be. It is a 14mm 1.5 pitch to 1/8" NPT pipe bushing with a regular American hose barb screwed in it. Since this whole assembly is about $13 and Teleflex wants more than $40 for the bushing alone, it is a heluva deal.
My next step is to get a 1/8x1/4x1/8 NPT tee, rethread the 1/4" port to 14mm (it is enough bigger that it should work) and move the Yamaha oil pressure sender to the tee, screw in the teleflex sender and screw the whole thing back in the hole with a close nipple and the other adapter I ordered.
That still leaves me with the water temp sender. I suppose I could just drill and tap a 1/8" NPT hole in the manifold but I am a little chicken about that. Telflex support says to use the surface mount bracket with the sender in contact with the head. I had one mounted like that on my 2 stroke Mariner and it did sort of work but it was pretty slow to respond.
I am still looking around at the manifold to be sure there is not a plug on the hot water side that I missed. I still have the 14mm plug I took out for the water pressure port that I could drill and tap to 1/8" pipe if I can find a hole for it. (or just buy another adapter)
The new F70 is doing great. I am out of the break in and running it up a bit more. So far I am doing about 1.8 gallons an hour on fuel.
My thoughts exactly...

-Ron Burgundy, "Stay Classy San Diego"
2005 Fiesta Fish n' Fun 20' 50HP Yamaha 2 Stroke
Fishing and Cruising Florida's Islands
The cure for anything is saltwater – sweat, tears, or the sea. Isak Dinesen
2005 Fiesta Fish n' Fun 20' 50HP Yamaha 2 Stroke
Fishing and Cruising Florida's Islands
The cure for anything is saltwater – sweat, tears, or the sea. Isak Dinesen
- Leisure Kraft
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Re: Yamaha and Mercury
We usually suggest to our customers that they put the oil inside the engine.GregF wrote:I am sure I have a surprise coming but so far so good. The problem is I am getting the itch to ride so a lot of those little things like pressure washing the boat may have to wait for next time.
I am going to go put 3 quarts of oil on the console right now so I don't forget.

Anyway, I was reading something the other day about where Mercury gets its engines. The screw hole alignment matching up doesn't suprise me much.
Mercury Outboards
<= 30HP are made at Tohatsu
40-60 are made in China
>= 75 are made in Wisconsin
It seems like Tohatsu and Suzuki have been making engines (or the major components of them) for the U.S. brands for a while now. You could probably buy the same Tohatsu 30HP engine from three or four other names.
Michael Blankenship 931-484-2681
Leisure Kraft Pontunes - 1996 Peavine Road, Crossville, TN 38571
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Leisure Kraft Pontunes - 1996 Peavine Road, Crossville, TN 38571
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Re: Yamaha and Mercury
I found it interesting that this motor doesn't take 3 quarts like it's Mercury brother. It takes a tad over 2. I ended up having to suck some out to get the oil level right.
I thought they might have just left some in from the factory but when I looked it up it says 2.5L which is about 2.64 quarts. That is not really easy to do with quart bottles.
I thought they might have just left some in from the factory but when I looked it up it says 2.5L which is about 2.64 quarts. That is not really easy to do with quart bottles.
1974 Harris
70 HP 4 stroke EFI Yamaha
70 HP 4 stroke EFI Yamaha
- Leisure Kraft
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- Joined: Wed Jul 20, 2011 12:08 pm
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Re: Yamaha and Mercury
You could do it by weight I suppose.GregF wrote:I found it interesting that this motor doesn't take 3 quarts like it's Mercury brother. It takes a tad over 2. I ended up having to suck some out to get the oil level right.
I thought they might have just left some in from the factory but when I looked it up it says 2.5L which is about 2.64 quarts. That is not really easy to do with quart bottles.
quart of motor oil = 1.836 lbs
64% of 1.826 lbs = 1.175 lbs or about 19 oz
Michael Blankenship 931-484-2681
Leisure Kraft Pontunes - 1996 Peavine Road, Crossville, TN 38571
http://www.LeisureKraft.com
Find us on the Pontoon Forum members map: http://www.zeemaps.com/295621/Leisure_Kraft_Pontunes
Leisure Kraft Pontunes - 1996 Peavine Road, Crossville, TN 38571
http://www.LeisureKraft.com
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Re: Yamaha and Mercury
One of the guys on Hull Truth says the official procedure is to put in 2 quarts, run it a few minutes, turn it off wait and dribble in a couple ounces at a time until it reads full.
1974 Harris
70 HP 4 stroke EFI Yamaha
70 HP 4 stroke EFI Yamaha
Re: Yamaha and Mercury
At least on mine you can manage to overfill it that way too. It seems that there are a few places that don't drain out properly unless you trim up the motor after running it. I've found the very best way to check the oil is when you first get to the boat cold, trim the engine down to running position and check the oil level and add as necessary. Knocking on wood here but for some minor adjustments after an oil change mines never used a drop between changes. It has made a bit a time or two when I've putted it around a bit to much, but taking it out a putting the throttle to it has always taken care of that issue. 

Respect Our Recreational Resources
Leaving Only "The Footprints of Your Passing"
Boating the Muskingum River
1972 35' Crest Pontoon Houseboat
2007 90 hp. Yamaha
Leaving Only "The Footprints of Your Passing"
Boating the Muskingum River
1972 35' Crest Pontoon Houseboat
2007 90 hp. Yamaha
Re: Yamaha and Mercury
I only have 10 hours on but the oil level has been rock steady. I am happy because my Mercury made oil.
It got a lot better as it aged but I still think it was leaking down from the injectors a bit. The up side of that was it started faster than the Yamaha.
It got a lot better as it aged but I still think it was leaking down from the injectors a bit. The up side of that was it started faster than the Yamaha.
1974 Harris
70 HP 4 stroke EFI Yamaha
70 HP 4 stroke EFI Yamaha
Re: Yamaha and Mercury
Well Greg it's time for you're initiation of changing you're motor's oil for the first time, it's due and called for in the manual... 

Respect Our Recreational Resources
Leaving Only "The Footprints of Your Passing"
Boating the Muskingum River
1972 35' Crest Pontoon Houseboat
2007 90 hp. Yamaha
Leaving Only "The Footprints of Your Passing"
Boating the Muskingum River
1972 35' Crest Pontoon Houseboat
2007 90 hp. Yamaha
Re: Yamaha and Mercury
It is on the list, right behind my Santa duties. Actually I think Yamaha says 20 hours but I still plan on doing it ASAP
1974 Harris
70 HP 4 stroke EFI Yamaha
70 HP 4 stroke EFI Yamaha
Re: Yamaha and Mercury
when I checked the dipstick on my Yammer 225 after the oil had been changed the first time, I noticed that it was only about halfway up the dipstick and there were two of the holes on the stick with no oil on them. Before adding more oil, I talked to the tech at the marina and he said that if they fill it up any more, expansion will cause it to overflow. He said that's where they fill all 4 stroke OBs and never have any issues.
What say you folk?
What say you folk?
2011 Bennington 2575RCW w/ ESP
F225 Yamaha
F225 Yamaha