Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

[Al-53]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

I visit a lot of fishing forums...and I always see posts of some one reccomending some one for boat work...some forums are broken down by states also....

look to see if any Michigan fishing forums..there must be alot since Lake Michigan is a great fishery....

hope it helps...

Al

 

[bob johnson]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

So, this is really a dumb question-

It came with a 1971 Evinrude Service Manual. I think the motor is a 72 Johnson (50 anniversary engine). Will this Evinrude manual work, as they're the 'same' company?

I havent checked but if they didnt make any major changes between 71 and 72, the manual you have will work fine, it doesnt matter if it is a johnson or evinrude manual if the motor is a 1971 or 1972!!!

the parts are interchangable....the proceedures are the same!!

the only thing different is the paint and decals and the first letter in the model number...

bob

 

[Solittle]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

My advice is to get the boat back from this guy and check it out yourself. There is more help available here than you can possibly use.

Another thing - I hope you learned your lesson by paying attention to the seller "Supposed to 'run good'. We get lots of posts like tha and then the troubles begin. You need to see for yourself that it "runs good."

 

[Ki Ki]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

My advice is to get the boat back from this guy and check it out yourself. There is more help available here than you can possibly use.

Another thing - I hope you learned your lesson by paying attention to the seller "Supposed to 'run good'. We get lots of posts like tha and then the troubles begin. You need to see for yourself that it "runs good."

That was my first mistake. We did see it 'run good' on ear muffs, but now I learn that under load and ear muffs are a vast difference. I'll know for the future. I'll keep everyone posted when I pick up the boat soon.

 

[Ki Ki]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

Here's a silly question, but what's the worst case scenario cost wise (at a shop) if one cylinder isn't running right. Yet, has good compression?

For example, if it needs new ignition coils installed, or something like that- what are we looking at cost wise? thanks!

 

[mrcj001]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

Here's a silly question, but what's the worst case scenario cost wise (at a shop) if one cylinder isn't running right. Yet, has good compression?

For example, if it needs new ignition coils installed, or something like that- what are we looking at cost wise? thanks!

Around $100.00 per hour plus parts............

It is simple to troubleshoot a no spark or weak spark problem on these engines:

If you have no or weak fire on one cylinder do this:

Swap the coil wire on the cylinder that wont fire right with one that does on the power pack.If the power MOVES from from one coil to the other, the pack is likely bad.

If the fire stays on the same cylinder the coil is likly bad.

This test will take approx. 15-20 minutes. Cost: $45.00

 

[AlTn]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

in looking at shop2.evinrude.com...the 50 hp. was made from 1971-1975...the ignition system component prices <dealer> are listed and you could get an idea of what he's talking about..

 

[Ki Ki]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

New mechanic said-Yep, sounds like ignition issue (don't know details yet) and carb rebuild needed. Total bill from shop would be $350. They said they wouldn't do it, because this is such an old engine and problems probably will keep just popping back up. But $350 to have a boat again doesn't seem that bad to me... should I do it? Is that fair?

 

[bob johnson]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

New mechanic said-Yep, sounds like ignition issue (don't know details yet) and carb rebuild needed. Total bill from shop would be $350. They said they wouldn't do it, because this is such an old engine and problems probably will keep just popping back up. But $350 to have a boat again doesn't seem that bad to me... should I do it? Is that fair?

you need to weigh what some mechanics say..

the old codger that does some repairs for me and who i buy some parts off of and get advice from...almost always says..dont do this and dont do that..because it is just too old and isnt worth it.. and you will get into more problems if you take this or that off...

ad the truth is that is good advice for MOST people , especially with people who have the cash and little to no extra time in their life...

it makes sense to just pay for stuff that is already working or is new..

he told me not to take apart my old 70 HP.. and sure enough the further I went , teh higher the percentage of bad stuff I found..

but it isnt UNDOABLE...even if it is a big battle.....

he doesnt realize i can do stuff like this.. I have the will and the means to fix just about anything...but he is right...all the big uglies are waiting under that next bolt to be undone..

broken bolts in blocks, broken bolts in lower unit castings...

how about an odd ball rod that dont come undone..and you ruin it...you going to find a single replacement??

or you going to get all new rods and new crank and on and on and on...

bob

 

[lake boat]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

im having almost the same problem except i have'nt done a carb rebuild yet cuz i don't know how to get the carbs off without wrecking all the linkage and dissmanteling the whole motor? i have a late late model mercury marine 50hp 500 series not sure of the year? the serial # is 7069753 not sure the model #? timing sticker stats 172 btdc 30, not sure if that helps find out the year of the motor. but anyways i got the engine started after puting fuel in the cylinder by removing the spark plugs and after that noticed their was no water coming out the pee hole so i replaced the impellor and housing, now water passes threw the pee hole but the boat does'nt go faster than jogging speed so to speak, like not even 5mph. so i need help figuring out how to remove the carbs or if their is an easier way to get the boat to perform the way it should. i was thinking of getting that mercury tuner spray, taking the boat to the lake start it by puting fuel in the cylinders then spraying the snot out of the carbs directly into the intake? well thats what im off to do.
but some expertice would be so helpfull in my quest for summer boating on a budget so please help me as well as my wallet. i got this boat off of craigslist for $1500 and supposabley the motor was rebuilt and has mostly new parts, well supposed to. thank you in advance

 

[Ki Ki]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

You guys will love this update! I took your advice and had it taken to a different mechanic. It turns out that the other mechanic never even touched the carburetors that he claimed he rebuilt!

He said the carburetors were so filled with crud that he had to let them soak overnight. He is doing a complete carb clean with new kits.

He said compression is 'great'. I asked if anything else he foresees it being and he said probably not. This should fix it up really well.

Interesting that carbs would cause: cold start, bogging engine, etc.

 

[Ki Ki]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

So as you can see from my previous post, I'm glad to have our boat at a great shop.

From a mechanical point of view, I'm trying to learn as I go here. How mechanically do carburetors being clogged up make the difference of a boat stalling under load, but not on ear muffs?

 

[steve6]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

So as you can see from my previous post, I'm glad to have our boat at a great shop.

From a mechanical point of view, I'm trying to learn as I go here. How mechanically do carburetors being clogged up make the difference of a boat stalling under load, but not on ear muffs?

When you are on muffs there is no load, so if the air/fuel mix is off a bit you don't notice it as much, carbs have many small passages and air ways to properly compensate for the conditions being run (such as acceleration, de acceleration, under load etc). Think of a car with clogged injectors, or clogged fuel filter, can start and move fine, but bog under hard acceleration and stall when slowing down.

with all engines its very important to have proper air/fuel mix, even more so with 2 stroke, if you cause a lean condition the cylinder can starve of fuel (AND OIL) and cause a melt down.

 

[steve6]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

one thing I want to add, is drain the gas tank of anything in it as best you can. Put new gas/oil before running it after the carbs are cleaned again.

 

[Ki Ki]

Re: Mechanic rebuilt carbs after stalling in gear, now runs but won't plane out.

one thing I want to add, is drain the gas tank of anything in it as best you can. Put new gas/oil before running it after the carbs are cleaned again.

Makes a lot of sense. Thanks a lot, Steve. Hopefully it runs good! So this makes sense that it could be just clogged carbs? He said they were FULL of gunk.