No water coming out of 1986 35hp Force

[mikmic2]

I just acquired a 1986 35hp force the white one. I put it on my boat, and stuck it in a barrel and started it up. Nothing was coming out. I ran it until I could no longer do the 3 second touch dealio. <br /><br />So, I figured no problem the motor has been sitting for a couple of years so it needs a impeller. So I take the lower unit off and take out the impeller, and it looks brand new, and the fins stuck straight out. It is still pliable and springs back out. So I am thinking another impeller is not going to fix this problem. I look and it does not have any water hoses inside the cowling. So, I am guessing that all of the water goes out the exhaust, but some should be spraying out of the two holes half way up the leg, but doesn't.<br /><br />It still has great compression, and I want to keep it that way, but don't know why it isn't pumping water. I looked down into the lower unit, and the water pickup is all clear. The tube in the top of the water pump is nice and tight. Where the two tubes connect together looks good. The inside of the water pump where the impeller rides looks good. The plate looks good. So I am wondering what it could be. It is a fresh water motor. I don't see a thermostat anywhere. <br /><br />Anybody have any ideas? I do see a allen key plug at the top of the head, but that's about it. So I don't know where I could back flush it from. Maybe from the allen plug on top of the head. What do you think? What am I missing? Any ideas?

 

[roscoe]

Re: No water coming out of 1986 35hp Force

Thermostat cover is #44 in picture below, just above the #1 cylinder.<br />Oddly, it doesn't show a thermostat. ?? <br /><br />Was the water tube connected at both ends? I know, hard to tell at this point.<br />Let us know what you find out.<br /><br />

 

[mikmic2]

Re: No water coming out of 1986 35hp Force

I got thinking. Probably a dangerous thing at this point. <br /><br />But anyways. I think I will take the garden hose and run some water up the tube into the block, with the allen screw out, and see what happens. If that works, and water comes out that plug hole pretty easily, I think I will attempt to put some water in that little plug hole and see if it runs down inside the leg. <br /><br />I'm thinking I would like to know where this hole is that the water exits out of, to cool the leg. Perhaps that hole is plugged. <br /><br />The tube that comes out of the water pump is about 6 inches tall, and it goes into or over the other tube that comes down from the block. So it appears that this is a two piece tube. Both tubes were straight and tight, so I have to believe that they were connected before I took it apart. But, come to think of it, when I loosened the bolts the lower unit started dropping very easily, so maybe where the two tubes join it wasn't a very good connection. I will look in to that, as well. I will go look at the other parts diagram to see if there is supposed to be another piece or something.<br /><br />I will let you know what I find out, over this ordeal. <br /><br />Thanks again for your quick reply.

 

[roscoe]

Re: No water coming out of 1986 35hp Force

You can remove the thermostat cover and force water into there.<br /><br />And replace the thermostat while you are at it.

 

[mikmic2]

Re: No water coming out of 1986 35hp Force

As you said, mine doesn't have a thermostat, and it doesn't show you can order one. <br /><br />I did look at my water pump housing again closely, and although the sides looked good, the top had some pretty good grooves, and although the ends of the impeller looked good, the bottom of the impeller had grooves in it that matched the top of the water pump housing. <br /><br />One other thing I noticed was the seal at the top of the water pump housing was hard and brittle and wasn't making a very good seal. I have a new seal and the washer that goes underneath it ordered. <br /><br />I didn't care to purchase a 58.00 water pump housing after I figured out that an old 20 hp chrysler I had laying around had the exact same water pump housing on it, and that one looked brand new. It also had a brand new seal on it. The only problem was the driveshafts are different sizes, with the 35 horse having the larger driveshaft, although the housings are the exact same. <br /><br />I ran water up the tube and water came out the plug and thermostat cover that I took off. I then ran water down into the thermostat hole and water was coming out of a hole up towards the bottom of the engine inside the leg, so I don't think I have any restrictions anywhere. So I am thinking after I replace the impeller, the seal and washer underneath the seal I should be ok. Along with my brand spanking new water pump housing thanks to that old 20hp Chrysler I had laying around.<br /><br />When I get my seals I will test it to see what happens. As everything else checked out ok, I have to believe these new parts will take care of my problem. If it doesn't I don't know what I will do. LOL<br /><br />I will update this post when I get the parts, which doesn't sound like it will be until this friday, so I should attack it this weekend. <br /><br />Thanks for the help, and I will let you know what I find out.

 

[roscoe]

Re: No water coming out of 1986 35hp Force

Fingers crossed.

 

[mikmic2]

Re: No water coming out of 1986 35hp Force

Your signature about that safety pin hook on a bamboo pole reminds me of some of my Dad's stories. One was fishing the Blue Diamond area in Chippewa County. On Townline lake, when he was a kid, him and his friends would run, or walk along the bank with a spoon on a bamboo pole to catch northerns. Sounds like a whole lot of work. I wonder what the catch ratio was. One northern for every 1 mile of jog? LOL

 

[roscoe]

Re: No water coming out of 1986 35hp Force

Signature is actually lyrics from a Joe Walsh song from back in the 70's. The song was titled "Indian Summer."<br /><br />Sounds like your dad was quite inventive and imaginative.<br />What a thrill it must have been to catch a 24 incher on a cane pole!!

 

[mikmic2]

Re: No water coming out of 1986 35hp Force

All is well. <br /><br />You know it's amazing what a difference 3 pieces make. <br /><br />I replaced the impeller, water pump housing seal, and the water pump housing, and it pumps water like I couldn't believe. <br /><br />I've seen housings in that shape work good before. But I think it was a combination of the housing, impeller and seal, that made the difference. <br /><br />Now, about two to three seconds after start-up water comes flying out of the holes in the leg. <br /><br />Thanks for the help and suggestions roscoe.<br /><br />What was kind of interesting was the new impeller seem to have twice as many paddles as the old impeller. I imagine they made the change for a reason, but I have never seen an impeller with 10 or 12 paddles, or whatever it was. I know one thing, it shoots water just great and the head no longer gets hot. <br /><br />I took it out on the river this evening, and it put's my 16 foot Flatbottom on plane real quick. <br /><br />I do have one concern though. It seems like the water doesn't even have a chance to warm up, it circulates so much water. I guess this is the way it's supposed to be, as mine never had a thermostat, and it doesn't show one on mercruiserparts. So I guess it's not supposed to have one. <br /><br />But I have to believe the engine is running pretty cool, especially this time of year with the 55 degree water temps. I'm thinking it's running to cool. What do you think?<br /><br />Can some kind of damage occur? <br /><br />The reason I ask, is because on the water cooled dirt bikes I used to own, the racers would tell me to make sure you warm up the bike before you started using full throttle, as the piston would warm up faster then the cylinder wall, and you could sieze up a piston that way, if the water and cylinder wasn't fully warmed up. So that is what's got me concerned. <br /><br />I did take it on a mile run today, but that was about it. And another couple half mile runs, in between throwing tube baits for smallies. I suppose that would of warmed up the piston, so maybe I don't have nothing to worry about, but it still makes me wonder why they want this block running so cool. What do you think?