77 merc 65 hp

[boating trucker]

Can someone help me out a bit, <br />I have a 77 Glasston with a 65 hp merc on it, the problem I am having is, after the free play, I get the 1st 1/3 throttle, and she is fine, 2nd 3rd throttle, she falls on her nose,. last 3rd throttle, it takes a bit then she picks up, but doesnt plane out like she should, the boat is a 15 ft trihull, and a 65 hp should pull it and a skier behind it, well, anyway, hope someone can give me some insite on it, thankx,,,,,TA

 

[JB]

Re: 77 merc 65 hp

Hi, Gene.<br /><br />What year is your Merc?<br />How long have you had the boat?<br />Did it ever run right for you?<br />What have you tried so far to locate the trouble?<br />Have you read through a half dozen or so other threads with the same symptoms to see what you might do?<br />Have you pumped the primer bulb while the engine is misbehaving?<br />Have you checked to see if all cylinders have hot, blue spark?<br />Have you determined if all cylinders are making power?<br /><br />Let us know.

 

[boating trucker]

Re: 77 merc 65 hp

Hi JB<br /><br />yes it is fireing on all cyl, and there is a blue spark on all three plugs, <br /> the motor is a 1977 65 hp outboard Merc.<br />just got off the landline with a dealer in Dodge City, KS and he said it might just be dirty carbs, another said he had to put it on a dyno, and a 3rd was home, so I dont what hew thinks, <br />the boat did fine fer a couple days,<br />but I was puttering around in a no wake lake with it, then I went to one that I could play and it did ok first day and went south soon as I put a tube behind it, er a bathtub toy fer the kids,,and I have had it in my posesetion fer a couple weeks now

 

[JB]

Re: 77 merc 65 hp

Nice work, Gene. Now we have more to go on.<br /><br />Sounds like a fuel starvation problem to me, but that doesn't have to be carbs. <br /><br />Check the fuel tank venting, fuel pickup in the tank, filter (if you don't have one, get one now.)and fuel lines for pinches or air leaks.<br /><br />Get the engine out under load and: pump your primer bulb. If that doesn't help, spray some fuel mix directly into the carbs, one at a time.<br /><br />If the primer bulb gets her going, overhaul the fuel pump. If you have to add fuel direct to the carbs and one of those picks it up, overhaul that carb.<br /><br />If none of the above works, inspect your plugs immediately after a full throttle run.. A wet, oily plug hasn't been firing. <br /><br />I don't know much about Merc ignitions, so we would then need some help from a Merc-spert.<br /><br />Let us know what you find.

 

[boating trucker]

Re: 77 merc 65 hp

Hi, JB<br /><br />ok, this weekend I will put her in the water and try the things ya said, plus all the fuel line and filter check, as far as I know, I didnt see a filter on her anywhere so maybe I should put one on her aye???<br />I would have to put it in line rite, then b4 the bulb, er after the bulb is the next thing,<br /><br />until next time, have a nice day!!!!<br />and thankx fer yer help, you have help more than the rest of the ppl I have talked to in the last few days <br /><br /> laterzzzzzzzzz Gene "TA" Green

 

[boating trucker]

Re: 77 merc 65 hp

one other thing b4 I ferget, I was also informed that the jets mite need to be reset, I think a turn and a half is the rite spec fer that , if not do you know what it is???

 

[boating trucker]

Re: 77 merc 65 hp

Hi, JB<br /><br />was talking to a friend today, he said something to the effect to reset my jets on the carbs, but wasnt sure what to set them to, IM thinking something to 1 1/2 turns out, maybe Im wrong, but I think thats rite, well anyway, Im headed out to a lake in sw Kansas to do some bass fishing, see ya all sunday nite,,,,,,,,TA

 

[Rex]

Re: 77 merc 65 hp

Hello red sky<br />I would love if everybody would ask quesition<br />in that way.<br />Rex A. Hubble

 

[boating trucker]

Re: 77 merc 65 hp

ok I have tried everything, think its time to pull the plug on here and put some rocks in her, let it sink to the bottom of lake, maybe it will find another life,