85hp force wont run high rpm backfires through top carb

[mike zerr]

had the motor in shop they put new starter and new thermostat and exhaust plate it idled fine when i took it in the problem was when you took off in forward the motor would lug and die then start right back up and idle smooth but would not run high rpm now 800 dollars later still same problem starts to plane off dies if you push in chock tries to run still wont plane now idles badly backfires threw top carb puffs little fuel out side of top carb he says he checked timing and compression i cleaned out all three carbs he also checked weights on flywheel please help fishing season is here

 

[TwoFish]

Re: 85hp force wont run high rpm backfires through top carb

Welcome to Iboats Mike.

Lots of people that come to this site for advise and finish up learning to work on their motors themselves. These motors are very simple and the people in this particular group are extremely helpful. If you are half way mechanically minded and have the time you will get there.

It really depends on whether you want to work on the motor yourself or not.

Taking the motor back to the shop and saying you are not happy, after spending $800 and it still not working, is a reasonable thing to do but may cost you more.

If you have lost confidence with the shop and you want to work on the motor yourself you will need to buy a workshop manual for your motor and some basic tools (Compression tester, spark tester. Timing light).

I would start by retuning the motor, Compression test ,Spark test and check the timing. Check float levels and adjust the carbys. This way you know what condition the motor is in.

From the symptoms you describe ( fuel blowing back through the carby) I think you may have a problem. with the reed valves.

Hopefully one of the more experienced people on this site can add more to this

Good Luck

 

[jerryjerry05]

Re: 85hp force wont run high rpm backfires through top carb

Compression/spark,first.Float levels in the carbs.Then rebuild the fuel pump.Top of Force section is a link to a linc and sinc.Check this and come back.I'm guessing U have 80's model 85.More info.
Profile.J

 

[mike zerr]

Re: 85hp force wont run high rpm backfires through top carb

Compression/spark,first.Float levels in the carbs.Then rebuild the fuel pump.Top of Force section is a link to a linc and sinc.Check this and come back.I'm guessing U have 80's model 85.More info.
Profile.J

im waiting on parts for fuel pump now but after doing some research on stater and triggers im hoping its not a trigger issue by firing the number 1 at the wrong time ? and yes its a 86 model is this a common problem?

 

[jason32038]

Re: 85hp force wont run high rpm backfires through top carb

If #1 fires at the wrong time then they all fire at the wrong time. Could be a combination of bent or broken reeds and a melted piston.

 

[mike zerr]

Re: 85hp force wont run high rpm backfires through top carb

update i rebuilt the fuel pump and behold the lean pop at low rpm is gone and smooth idle and easy starting i havent put it in the water but after comparing the diafram in the pump to the new one the problem was obvious thanks for the help guys

 

[foodfisher]

Re: 85hp force wont run high rpm backfires through top carb

Just be seated when you punch the throttle.

 

[SwampThing]

Re: 85hp force wont run high rpm backfires through top carb

Mike,

Glad to hear you were able to get your motor running properly again.

Here's what I have a major issue with and I seem to hear it a lot:

You paid $800 to have your motor worked on. You described the problem, they worked on it and you were given back the motor with the same problem you took it in for. So we can surmise that they DID NOT fix the problem. I have no idea why they did what they did to your motor in the first place, IF what you took it in for is e same thing that you described here.

I was an Auto Mechanic for almost 18 years. This BS would not have flown in any shop / dealer I ever worked in. I would have been the shop jackass if I had returned a vehicle to a customer with the same problem they brought it in for in the first place. Especially after charging them for what would now amount to UNNECESSARY repair work.

You can bet your last dollar that customer would be pitching a royal gripe. I would be forced to "own" that vehicle until it was fixed properly. Since my pay is based on a commission rate scale, it would be in my best interest to fix that vehicle PROPERLY and as fast as possible.

Still I hear people say; they charged me XYZ and my vehicle (in this case boat) still has the same problem. My advice is to go back and gripe until you get your money back. When they say, oh' but we'll fix it, tell them they already had their chance and you had to do it yourself. Now you want your money for the unnecessary repairs they preformed. You didn't say it was slow cranking or over heating. Did it have those problems also?

This stuff really burns my *** because I was made to "eat" so many bad repair jobs by other techs over the years. When I hear of someone with a legit gripe about being screwed over I want to go take up the fight for them, because I know how the game is played.

There is also state agencies specifically for handling these complaints and they're bulldogs. Every repair facility knows you don't want the state agency on your butt. Things get taken care of real fast when you call them. I've had to deal with them also.

Good luck, but I would want my $800 back. That's a healthy chunk of change.

 

[mike zerr]

Re: 85hp force wont run high rpm backfires through top carb

took the boat to the lake problem was better but still there i gave up and returned the boat to A DIFFERENT SHOP and next day they had replaced the needle and seats in to of the carbs and some tube in top carb was pushed up blocking fuel anyway 380 more dollars but........the boat has ran flawlessly last to times to the lake and tops out around 40-42 miles per hour so im happy the nightmare is over also rhitt (hope i spelled that correctly) when you get those trim parts we discussed please let me know thanks for the input guys happy boating