confused

[allen6634]

i have a 1983 johnson 88 spl outboard engine this engine runs great it will idel perfect when it is not under a load and it also runs great at wot ,the only problem i'm having with this engine is that when i put it in gear it will die , to remedy this the prvious owner had the engine idling realy fast , to the point that i'm worried about breaking somthing when i put it in gear, the engine will idel great as long as it isn't under a load (prop in water ).i have taken the prop off to see how the engine will act and it will idel great. is there anything i can do to remedy this ?

 

[Daviet]

Re: confused

Is it firing on all cylinders? Have you checked the spark and compression? When was the last time the carbs were serviced? Any leaks in the fuel lines, all connections tight?

 

[allen6634]

Re: confused

yes it is firing on all 4 i haven't checked any thing on this motor as of yet i have looked over the out side of the carbs. and the fuel lines are tight. everything looks like it is like it is supposed to don't see any thing ovious to me. im a mechanic so i do under stand the principles of a engine.( just new) to outboards thanks for your reply.

Is it firing on all cylinders? Have you checked the spark and compression? When was the last time the carbs were serviced? Any leaks in the fuel lines, all connections tight?

 

[Daviet]

Re: confused

All it takes for your engine to run properly is timed spark, fuel and compression. You have a problem in one of those areas.

 

[allen6634]

Re: confused

then why don't i have a problem when my engine is in neutral

All it takes for your engine to run properly is timed spark, fuel and compression. You have a problem in one of those areas.

 

[crb478]

Re: confused

My best guess would be that your low speed jets are partially clogged and that the carbs flow enough fuel when the motor is idling n neutral, but when a load is applied it stalls. I doubt your timing has changed, but the prior owner may have tweeked it who knows. I would do a compression test just to verify that it is good and then write the valuse on each cylinder head to keep as a handy baseline. When were the carbs last cleaned?

 

[allen6634]

Re: confused

thank you crb487 it is so nice to get a reply with advice i can use. i post on this board for guidance and advice. like i posted in an earlier post i just got this boat and i am new to outboard engines ,but i do remember posting that i am a mechanic so i do understand how a engine works. i was wondering about using this sight at all . well i'll spare you with my ranting. thank you very much for your advice i will use it .o and as for your question about my carbs that is something i can't answer seeing i just got it but they do look real clean on the out side lol.

My best guess would be that your low speed jets are partially clogged and that the carbs flow enough fuel when the motor is idling n neutral, but when a load is applied it stalls. I doubt your timing has changed, but the prior owner may have tweeked it who knows. I would do a compression test just to verify that it is good and then write the valuse on each cylinder head to keep as a handy baseline. When were the carbs last cleaned?

 

[crb478]

Re: confused

No matter what the carbs look like you will need to disassemble them and then soak them in one of the cans of carb cleaner making sure to remove the jets and the welsh plugs. Get new kits and blow air through everything as well as spraying carb cleaner from a can through all passages before reassembling. The openings are tiny and it only take a little stale gas to gum them up. Several people here have cleaned their carbs several times before they got them clean enough, most of the time they skipped the kits and the welsh plugs until the last time. The good news is that they are easier to clean than to take off the motor.

 

[allen6634]

Re: confused

cleaning of the carbs is on my list a have been looking at what it is going to take to remove them,and it doe's look like there is going to be alot of things to remove just to get to them i was just hesitant to take my carbs off until i felt like this could help.i will give the pilot/low speed jets a good inspection. thanks for the advice.

No matter what the carbs look like you will need to disassemble them and then soak them in one of the cans of carb cleaner making sure to remove the jets and the welsh plugs. Get new kits and blow air through everything as well as spraying carb cleaner from a can through all passages before reassembling. The openings are tiny and it only take a little stale gas to gum them up. Several people here have cleaned their carbs several times before they got them clean enough, most of the time they skipped the kits and the welsh plugs until the last time. The good news is that they are easier to clean than to take off the motor.