My jet Jon build thread

[CedarRiverScooter]

Maybe you can get a trim-nozzle for it, or modify the steering nozzle you have to angle it up a bit.

 

[Capt1972]

My issue is I can't shim the pump. It's one of those 1 piece Yamaha pumps


Sent from my iPad using Tapatalk

maybe a little work but I imagine you should be able to "shim" the steering nozzle with a little ingenuity.

.

 

[Boz Mon]

I'm currently exploring a few different options.


Sent from my iPhone using Tapatalk

 

[Boz Mon]

I d cut my ride plate yesterday but there was a 10mph wind so I'm not sure if it made a difference. I do know that this boat doesn't like chop. We had like 2 foot rollers from the wind and it was constantly coming unhooked.

I did find a cove that was like glass and did a gps run. Managed a nice round 30mph


Sent from my iPhone using Tapatalk

 

[PSG-1]

You can probably get an aftermarket +5 degree nozzle, or a +5 degree pump wedge that fits between the stator and the thrust nozzle (like Capt1972 mentioned) This will make a difference.

 

[Boz Mon]

I looked all around. No one seems to make a wedge for the 144 yami pump. I should have a complete trim nozzle system by mid week though.


Sent from my iPad using Tapatalk

 

[Boz Mon]

Front crank seal failed on Friday. I will be swapping a 701 top end on the 650 bottom end. I'll be using the sbt cylinder exchange. New gaskets and seals all around. Needless to say it was an expensive weekend.


Sent from my iPhone using Tapatalk

 

[CedarRiverScooter]

Too bad about the failure. Are your carbs & fuel pump healthy? They can melt pistons too.

 

[Boz Mon]

Yea the carb is a fresh rebuild. The spring for the front seal actually was stuck to the stator when I took the motor apart


Sent from my iPhone using Tapatalk

 

[Boz Mon]

Just a few minor things getting done while I wait for my motor parts to show up


Sent from my iPhone using Tapatalk

 

[Capt1972]

What did you use for your intake tubes?

 

[Boz Mon]

They're just holes. The chrome rings are the trim ring from ceiling sprinklers.


Sent from my iPhone using Tapatalk

 

[Capt1972]

They're just holes. The chrome rings are the trim ring from ceiling sprinklers.


Sent from my iPhone using Tapatalk

Great idea!

 

[Boz Mon]

Got this thing back together over the weekend. I ended up finding 701 cases so the motor is now a true 701. Took it out for a bit and even with it running super rich on break in, I can tell a pretty big power difference. I'm not ready to take it far from home yet since the water is still cold and the boat is mostly untested.


Sent from my iPhone using Tapatalk

 

[CedarRiverScooter]

I also am leery of the reliability of my floating contraption.

I (almost) always go upstream, & carry a trolling motor as a backup.

A cellphone & a wife aware of your float plan is a good backup too!

 

[Boz Mon]

Little update on the boat. It was running really funny on Saturday. Felt like it was hitting a rev limiter. I did some testing and messing around. Swapped the coil out of my Yamaha stand up ski into the boat and it ran perfect.

I sent the boat coil to jet ski solutions on Monday to have new wires and boots fitted so hopefully the boat will be back on the water this weekend


Sent from my iPhone using Tapatalk

 

[Boz Mon]

Small update on the boat. It's been running good for awhile now with the new 701. I had to reinforce the front of the boat because it was caving in from water hitting it. This caused a few holes which I ended up through bolting with 5200. The boat seems to not be leaking much now.

I also have adjustable trim, and last night I swapped the prop out for a skat 12/17 swirl.

The boat is super fun and it gets up and goes pretty good. Me and my sister have been exploring backwaters on the river. Gps'd the boat at 33mph with me and her in it.


Sent from my iPhone using Tapatalk

 

[CedarRiverScooter]

been exploring backwaters on the river. .

This what Jet Jons are all about!

My engine (polaris 750) is in pcs, awaiting new crank.

Can't wait to skim over some shallows again!

Glad your boat is working good.

 

[Boz Mon]

Skat swir prop is the best mood ever for this boat! It takes off from idle like a freight train and hookup in chop is improved a lot! Anyone who's on the fence about spending a lot of money on an aftermarket prop, do it!


Sent from my iPhone using Tapatalk

 

[Boz Mon]

Small update: the boat is slowly ripping itself apart still. I ended up taking the center bench out to reinforce the area from the front of the engine to just after the bench. It's the last part of the boat with no reinforcement and it's bad. The rivets are cracking from stress. When I pulled the boat out of the water there was a solid stream of water pissing out the bottom.

Hopefully this week the issue will be resolved. Who knew this would be the weak point of my build


Sent from my iPhone using Tapatalk