- Location
- NH
short verison
13/18 prop cavitates down low, slow acceleration, and slow up top (not max rpm)
long version
i saved a 750 BP motor, lightened flywheel, B pipe (center bleed style), dual kehin carbs, 750 ebox, and pump (with 13/18 KA-SC-I Solas, AM cone, and some sort of reduction nozzle spacer/extender, plastic steering nozzle) from a jet mate that was extremely fast IMO. neck snapper, crisp throttle and hook up everywhere
i sold the jetmate as an empty hull and kept all the above to maybe put into my keeper jetmate that has a nicer hull. since it already had a 750 small pin, i never did the swap and it sat in a bin for a year.
i came across the SC empty hull and figured i could throw it all in there. thinking if it ran anything like that jetmate it would be a silly fun ski..
I swapped the dual kehins for an sbn46 . and I swapped the B pipe for a coffmans pipe and manifold. i used a sea doo purple waterbox and a scoop intake grate (jet mate used stock waterbox, and i forget which intake grate it had). oh and i also added dual cooling to the pump before it went in the SC.
i get coffee brown plugs at both high and low plug chops new 2.0 needle/seat and black spring. jetting was something around 120/147.5 i think (i have it written down if i need to verify)
when i gas it off idle it will cavitate and rev up really high until i let off the gas (motor sounds awesome when it does this). if i gas it off idle while turning slightly it will hook up and take off slowly, and get on plane after a circle, maybe 2. if i remove the intake grate, this cavitation stops and i can easily get on plane, however still WAY slower than it should be.
once on plane, acceleration is doggish. top speed is slow and not max rpm.
i cant figure out what changed. i believe if the jet mate pushed that prop, then it should be even easier for the SC...
i siliconed the pump in, and have successfully done this before without this issue
i tried impros and they said they were at a loss. that i could try the 10/16 hooker but they couldnt guarantee it would be the issue.
the pump is a little salty but like i said... this exact setup (minus pipe and carbs) RIPPED in the jetmate.
desperate for a solution soon. been building it for a painful 6 months due to other projects in the way. hoping to get it done soon. i may pull the pump this weekend to inspect, but i cant imagine im going to find an issue...
13/18 prop cavitates down low, slow acceleration, and slow up top (not max rpm)
long version
i saved a 750 BP motor, lightened flywheel, B pipe (center bleed style), dual kehin carbs, 750 ebox, and pump (with 13/18 KA-SC-I Solas, AM cone, and some sort of reduction nozzle spacer/extender, plastic steering nozzle) from a jet mate that was extremely fast IMO. neck snapper, crisp throttle and hook up everywhere
i sold the jetmate as an empty hull and kept all the above to maybe put into my keeper jetmate that has a nicer hull. since it already had a 750 small pin, i never did the swap and it sat in a bin for a year.
i came across the SC empty hull and figured i could throw it all in there. thinking if it ran anything like that jetmate it would be a silly fun ski..
I swapped the dual kehins for an sbn46 . and I swapped the B pipe for a coffmans pipe and manifold. i used a sea doo purple waterbox and a scoop intake grate (jet mate used stock waterbox, and i forget which intake grate it had). oh and i also added dual cooling to the pump before it went in the SC.
i get coffee brown plugs at both high and low plug chops new 2.0 needle/seat and black spring. jetting was something around 120/147.5 i think (i have it written down if i need to verify)
when i gas it off idle it will cavitate and rev up really high until i let off the gas (motor sounds awesome when it does this). if i gas it off idle while turning slightly it will hook up and take off slowly, and get on plane after a circle, maybe 2. if i remove the intake grate, this cavitation stops and i can easily get on plane, however still WAY slower than it should be.
once on plane, acceleration is doggish. top speed is slow and not max rpm.
i cant figure out what changed. i believe if the jet mate pushed that prop, then it should be even easier for the SC...
i siliconed the pump in, and have successfully done this before without this issue
i tried impros and they said they were at a loss. that i could try the 10/16 hooker but they couldnt guarantee it would be the issue.
the pump is a little salty but like i said... this exact setup (minus pipe and carbs) RIPPED in the jetmate.
desperate for a solution soon. been building it for a painful 6 months due to other projects in the way. hoping to get it done soon. i may pull the pump this weekend to inspect, but i cant imagine im going to find an issue...
Attachments
-
40684661_1944586308921433_2467284073886777344_n.png -
40761958_296436597833428_3983459592968339456_n.jpg -
40779062_293464511435814_4354517949566943232_n.png -
40826063_325090714724300_8992903615010045952_n.png -
40848439_238102283521026_8651656106721935360_n.jpg -
40858898_327051654518484_4127123126578315264_n.jpg -
40882618_324345548319802_682240286360862720_n.jpg -
40962693_231106540916379_1998322607790751744_n.jpg -
41016728_2174698859411759_8513715367925776384_n.jpg -
41089008_311474639403640_1594125172594442240_n.jpg
