Welcome to Jetboaters.net!

We are delighted you have found your way to the best Jet Boaters Forum on the internet! Please consider Signing Up so that you can enjoy all the features and offers on the forum. We have members with boats from all the major manufacturers including Yamaha, Seadoo, Scarab and Chaparral. We don't email you SPAM, and the site is totally non-commercial. So what's to lose? IT IS FREE!

Membership allows you to ask questions (no matter how mundane), meet up with other jet boaters, see full images (not just thumbnails), browse the member map and qualifies you for members only discounts offered by vendors who run specials for our members only! (It also gets rid of this banner!)
Guest, we are pleased to announce that Hydrophase Ridesteady is offering an extra $100 off for JETBOATERS.NET members on any Ridesteady for Yamaha Speed Control system purchased through March 7th, 2025. Ridesteady is a speed control system (“cruise control”) that uses GPS satellites or engine RPM to keep your boat at the set speed you choose. On twin engine boats, it will also automatically synchronize your engines.

Click Here for more information>Ride Steady group buy for JetBoaters.net members only

You can dismiss this Notice by clicking the "X" in the upper right>>>>>

General Discussion

Sport jet 90 no crank

Thread starter Teeko
Start date Jun 13, 2021

Teeko

Active Member

Jun 13, 2021

Hi everyone. I've got a thundercraft typhoon with a SJ90 in it. Had a few issues with it last year and broke down and took it to a marina. They replaced the rev limiter and said it was running great. I basically picked it up and put it in storage for the winter. Pulled it out of storage yesterday, installed the battery and it cranked a few times today then nothing. It has power and when I bridge the battery to the starter, it cranks and fired up but nothing with the key. I figure I blew a fuse but I only see 2 fuses in the engine compartment. A 20A fuse near the top of the motor/by all the electronic bits and a 15A fuse that runs from the battery cutoff switch. Both are good. The manual shows a 20A fuse for the starting circuit. Is there another fuse I'm missing? If so, any ideas where it is located.

You must log in or register to reply here.