1998 Sportster 1800 Port Engine Stalls about 3,000 RPM

[jwogick]

Hello I'm new to the forum and just bought a 98 Sportster 1800 in excellent shape. I took it out with the family for the first time yesterday and the port engine wants to stall when slowly throttling up around 3,000 RPM. If you throttle fast it will run right up to 7,000 RPM no problem. Also if you throttle down slow it will stall about 3,000 RPM but if you idle down very fast it will idle fine. Plugs & filters are new and also it has sat for almost 2 seasons in storage.
Does anyone have any idea what the problem might be? It has twin 717 Rotax ewngines and the other engine runs fine. Could it be carbs or maybe the accel pump? Any help would be greatly appreciated.

Thanks!

 

[timmyboy76]

yeah, first thing is,...was it you ,that cleaned/rebuilt the carbs last...if not, think it be a good idea?
Make sure, on the xcellerator pump, you completely take apart (not big deal, just re-did mine, other day), and spray (carb cleaner), so all passages and "fittings" are clear. Somehow, when I did this about a month ago, dam pupm, got clogged again. Clean everything, inside carbs, likely, your careful enuf, that all it needs is clean'n, just dont rip gaskets, and also, clean out the inline filter...:cheers:

 

[Gunsrunner]

:agree:
Dito on the carbies, but when was the last time the raves were cleaned of carbon, needs to be done each season.

 

[timmyboy76]

:agree:
Dito on the carbies, but when was the last time the raves were cleaned of carbon, needs to be done each season.

No raves on the 2-717 Sportster, stud...:cheers:

 

[jwogick]

I just bought this boat so I have never cleaned these carbs, but I spoke to my Sea-Doo marina today and they have 2 pumper diaphragms in stock so I will take your guys advice and pull the carbs out and clean everything and install the new diaphragms and see how it works!

 

[Gunsrunner]

No raves on the 2-717 Sportster, stud...:cheers:

Thanks, perhaps i should just stick to the boat i know. LOL:rofl:

 

[timmyboy76]

Thanks, perhaps i should just stick to the boat i know. LOL:rofl:

WHen it comes time for install'n the stereo system in my boat, YOU'LL definetly, be get'n a PM from me...:cheers:

 

[jwogick]

Runs great now

Well I took the advice and changes the pumper diaphrams and the small screen filters in the carbs and now the boat runs great! The screens were almost full of debris and the diaphrams were a little dry rotted as well.