SeaDooSportBoats.com: Motor troubles - SeaDooSportBoats.com

Jump to content

Help

Want to be a vendor and featured like this, contact us here.

View New Content

You are currently viewing in "Guest Mode" not all community content is available. Register today it's FREE!

Page 1 of 1

You cannot start a new topic
You cannot reply to this topic

Motor troubles Rate Topic:

#1 dug

Novice

Group: Members
Posts: 7
Joined: 15-May 10
Year of DOO:1997
Model of DOO:Speedster
Engine in DOO:Twin 85hp Rotax (720)

Posted 14 June 2010 - 08:07 PM

I recently purchased a 97 Speedster and it is a great boat for me as I am new to the whole sport boat thing. I have had it out a few times and it has run great until this past Sunday. It was a typical day on the river for my fiance and I. The boat ran and performed great until we were ready to leave. We started up river with both motors running 7500rpm then i noticed the left motor rpm starting to drop without me moving the throttle. After getting it home i popped the top and started my normal diagnosis. I removed the air cleaner assembly and noticed there is a short cable that was not attached and I assume it should be. Can anyone help?
Doug

#2 Kevin Leclair

SeaDooSportBoats.com Founder

Group: SDSB Management
Posts: 5,127
Joined: 01-October 03
Water:Allatoona Lake
Year of DOO:2010
Model of DOO:210 Wake
Engine in DOO:Twin Rotax 4-TEC SCIC

Posted 15 June 2010 - 07:31 AM

Doug, it is hard to say exactly what cable this might be. It could be a throttle cable, but I don't want to make any assumptions. We do have a shop manual, http://seadoosportbo...er-shop-manual/, available for your boat - this should be able to assist you with better pin-pointing what exact cable this is.

Need a shop or part manual for your boat or PWC? Join the SDSB Club here, http://seadoosportboats.com/join and download them here, http://seadoosportboats.com/files

Want to spread the word about SeaDooSportBoats.com and sport some official SDSB Gear? See what we have to offer here, http://seadoosportboats.com/page/gear

#3 dug

Novice

Group: Members
Posts: 7
Joined: 15-May 10
Year of DOO:1997
Model of DOO:Speedster
Engine in DOO:Twin 85hp Rotax (720)

Posted 22 June 2010 - 11:44 PM

I was reading another forum and I came across a guy who has the same problem I do and it is when i attempt to throttle up on my 1997, twin rotax speedster, the left engine will only rev up to 6000 or 7000 rpm's for a minute, then cuts back to 4000. will do this over and over. I was wandering if it's the rev limiter or maybe a carb problem. ANY HELP?

#4 Kevin Leclair

SeaDooSportBoats.com Founder

Group: SDSB Management
Posts: 5,127
Joined: 01-October 03
Water:Allatoona Lake
Year of DOO:2010
Model of DOO:210 Wake
Engine in DOO:Twin Rotax 4-TEC SCIC

Posted 23 June 2010 - 06:49 AM

Doug,

Yes it could be either the rev limiter or a carb problem, it is just really difficult to accurately diagnose remotely. Here are a couple of posts that might point you in the right direction regarding these possible issues. I have also posted a how-to on rebuilding the carb if this is the determined problem. Keep us posted on your findings.

Rev limiter:
http://seadoosportbo...m-issue-take-2/

Carb:
http://seadoosportbo...m-on-rotax-657/
http://seadoosportbo...-over-3500-rpm/

Carb Rebuild How-to:
http://seadoosportbo...i-carb-rebuild/

#5 dug

Novice

Group: Members
Posts: 7
Joined: 15-May 10
Year of DOO:1997
Model of DOO:Speedster
Engine in DOO:Twin 85hp Rotax (720)

Posted 26 July 2010 - 10:55 PM

So after a few different things I found out that the motor was getting exhaust air in it and not clean air. The exhaust air is coming from the right engine exhaust which has a hole in the coupler. I ordered new ones and the should be here this week. Any suggestions on how to prevent this from happening in the future?

#6 Kevin Leclair

SeaDooSportBoats.com Founder

Group: SDSB Management
Posts: 5,127
Joined: 01-October 03
Water:Allatoona Lake
Year of DOO:2010
Model of DOO:210 Wake
Engine in DOO:Twin Rotax 4-TEC SCIC

Posted 27 July 2010 - 11:33 AM

Glad you got it figured out. Do you boat in saltwater or freshwater?

#7 dug

Novice

Group: Members
Posts: 7
Joined: 15-May 10
Year of DOO:1997
Model of DOO:Speedster
Engine in DOO:Twin 85hp Rotax (720)

Posted 27 July 2010 - 06:42 PM

Freshwater.

#8 Kevin Leclair

SeaDooSportBoats.com Founder

Group: SDSB Management
Posts: 5,127
Joined: 01-October 03
Water:Allatoona Lake
Year of DOO:2010
Model of DOO:210 Wake
Engine in DOO:Twin Rotax 4-TEC SCIC

Posted 27 July 2010 - 06:52 PM

Okay well that rules out my assumption, I was thinking maybe the saltwater corroded something in there causing the hole.

#9 hrdtduck

Novice

Group: Members
Posts: 11
Joined: 04-October 10
Water:Lowell/Jasper Resivore
Year of DOO:1998
Model of DOO:Speedster 160
Engine in DOO:Twin 110hp Rotax (800)

Posted 04 October 2010 - 09:48 AM

Speaking of salt water corrosion On the Port engine I had a pin hole water leak in the upper portion of the exhaust pipe right were it appears there is a cast mold mark...while the engine was running it was squirting out under high pressure, not a lot of water, but!!... took the pipe out (just the upper section)I drilled it out to 5mm tapped it and but in a SS bolt...no more leak.