broken Trigger???

[ryanc]

Re: broken Trigger???

My serial # 3669749. My hp 20hp 1973 Mercury model(200)

 

[emckelvy]

Re: broken Trigger???

Torque to 180 inch-lbs and use a drop of Red Loctite as suggested and you'll have no problems. Be sure to clean the threads with a suitable degreaser, to ensure the Loctite sets up properly............ed

 

[ryanc]

Re: broken Trigger???

Clams, I am looking for the rod bolts, the head mechanic said that the bolts stretch over time and Cylmer manual says to change the bolts if you are in the vicinity.<br /><br /> mercury had the gaskets,bearing and seal but ni longer have in stock the rod bolts. They wanted $50.00 per set of rings, I found rings at grubbs.com for $3.80 per ring which is a way lot cheaper. still looking for rodbolts.<br /><br />the rodbolts are the type that bolt goes thru sleeve and has a nut on the end, bolts are not stretched as they are good and tight. two bolts and nuts per piston rod.<br /><br />anyway I finally found rodbolts at precision marine but they want @12.00 or $3.00 per bolt and nut, that's pretty expensive. what do you think? keep the bolts I got??

 

[emckelvy]

Re: broken Trigger???

I've never had one of this type of rod bolt break. On the newer bolts, that aren't thru-type, you must replace them every time but the old-style bolts are not designed as a stretch bolt. As long as they are properly torqued you should have no trouble.<br /><br />I can't tell you how many old inlines I put together when I was still learning & didn't even have an inch-lb torque wrench; torqued by feel they ended up being about right. Never any probls with.<br /><br />BTW, I saw an auction on eBay for an <intact!> 20 HP flywheel, take a look at the photo's and it might help you get yours realigned:<br /><br /> http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2458890582&category=50439

 

[ryanc]

Re: broken Trigger???

Ain't that something !!! A picture of the ole flywheel, its good enough to get that key shaft piece back in right position, sure am glad you were surfing ebay, thanks alot Ed Mc!! Well, The rod bearings looked good as did piston and cylinder walls, I just cleaned them up real nice, the old saying, If it ain't broke don't fix it. I will just put in new rings and lower crank bearing,seal and endcap and put her back together. Those rodbolts are super tight. thanks again for your help, really appreciate it

 

[ryanc]

Re: broken Trigger???

Thanks again everybody for the help. I will inform all of you of what happens when she is back together in 1 piece. I hope the noise is gone, and my power comes back in full force...<br /> thanks again Ryan C.

 

[Clams Canino]

Re: broken Trigger???

How you got the keyway algnment from that pic escapes me. I cant see the keyway from the bottom view. You have beeter eyes than I.<br /><br />-W

 

[rickdb1boat]

Re: broken Trigger???

ryanc <br /><br />Another source for info and some parts:<br /><br /> web page

 

[ryanc]

Re: broken Trigger???

True Clams, I can't see it either from the bottom, but from the top it will have to be one of two positions cause theres and arrow on top of flywhell pointing to the two screws that are to be removed in order to use a flywheel puller. Being that i am able to see from the top the key hole in relation to the two screws it has to be one of two positions. I did mark the top pieces beforedisassembly, it was the key hole I needed to realign with top. Perhaps Chainwalker can get a better picture from the bottom, anyway it helps some. thanks for reply.

 

[Clams Canino]

Re: broken Trigger???

Do a "question for seller". Be specific and ask him the two choices. <br /><br />If "the force" tells you that he won't answer the question for philanthropic reasons, couch the question as "there's two types and I wanna make sure I get the right one" he'll answer if the sale is riding on it.<br /><br />-W

 

[ryanc]

Re: broken Trigger???

Thanks again all. From the pic the way it is, my son said he can align it right again.. RC

 

[ryanc]

Re: broken Trigger???

Good idea clams, I contacted seller and asked for a better picture of flywheel from underneath especially the area that engages shaft key. I have been in touch with him already concernig a 1973 head that he has advertised as a 1972, am looking at maybe getting this extra head. thanks again for your ideas.

 

[ryanc]

Re: broken Trigger???

Guys i may have run into a problem... on the back cover on my crankcase cover there is a chip where the bottom oil seal goes.. i'm trying to add a photo i took of it here on my post -----after viewing,, tyell me if i can use j-b-weld to fill hole, or can i let a machine shop repair the hole....

<br /><br />let me know if me picture post worked....if not i can e-mail people the picture to me me out... thanks rc

 

[Chinewalker]

Re: broken Trigger???

Hi Ryan,<br /> I struck out on the flywheel. All I had were later 1970s versions and one late 1960s one - none with the magnets on the hub, although I do have a hub and no flywheel with it???<br /> I got red-exxed on your photo post...<br /><br />- Scott

 

[ryanc]

Re: broken Trigger???

thanks chinewalker for trying, I bought another head today for $50 bucks with respect to compression of 121psi/and 122psi. the same fellow had for sale a flywheel but it is different from the one I have. Theres only eight screws so i will have to maybe rotate the magnets eight times till they are in right position for firing.<br /><br />Motor originally lost power on top end with alot of noise, 2 ballbearings missing out of race(lower crank bearing) today I notice one loose bearing went thru the lower oil seal and actually chiped out a spot. I used JB WELD and got it back into good shape for seal to set. anyway, thanks for your help. Clams said there were two kinds of flywheels for the 73 merc 200 20, the head i bought was advertised as a 72 but the numbers indicated a 73,(3549---) and the folks here said it was a 73.<br /><br />well, thanks again

 

[Clams Canino]

Re: broken Trigger???

Originally posted by ryanc:<br />Clams said there were two kinds of flywheels for the 73 merc 200 20,

Bzzzt, I said to *tell* that to the Ebay seller in order to *motivate* him to give you the exact info *you* needed regarding magnet to keyway placement. Nothing like thinking you might make a sale to motivate you to describe an item to the last mircon.<br /><br />-W (an Ebay seller who's been on the other end of that trick - a few times)

 

[ryanc]

Re: broken Trigger???

Clams, <br /> I completely misunderstood what you said, sorry about that, but I didn't want to manipulate the guy for my benefit, anyway the flywheel he has is not the same flywheel that I have though he was nice enogh to send another picture. He said it was a 73 but guess he was wrong. <br /><br /> The head i got he said was a 72 but Iboats says the number on the head is 73. He says it is electric start ready, WHAT does that have to fo with the head?? The head I have does not have an electric starter though I could put one in on the bracket hiven. thanks again for your help.

 

[Clams Canino]

Re: broken Trigger???

I expect that "electric start ready" would mean that it had a stator on it to charge the battery and more magnets in the flywheel to run the stator. <br /><br />What's funny, is that now knowing they came in two models (with and without electric start) it appears that there were probably two flywheels all along! Strange world.<br /><br />-W

 

[ryanc]

Re: broken Trigger???

Ah-ha I surely was confused looking at the pictures of the flywheel magnets and there orientation to shaft key. But there is no difference in the head, only the number of magnets and stator?<br /><br />can you explain if number one piston is tdc then what position would the flywheel be in on the shaft for firing or spark?? I have worked on johnson that had points but this has no points, so trying to understand with a switchbox how the thing actually works. Thanks again, for sure-strange world!!