Looper

[dsmith looper man]

Yes I have a 225 Johnson v6 need some help I just took it off my gambler and put in on a shadow tunnel hull vt and I took it out yesterday and cummin out the whole the rev limiter is going off and when she gets on a plane if I back of throttle she will cruse fine but if I try to trim or give it more gas the rev limiter goes of and the motor starts to shake like its cavatating please I need help what to do to fix it

[davemvegas]

at what rpm is rev limiter kicking in? if at low rpms around 2500 it could be the motor thinking it is overheating or oil tank is low on oil. if it is at higher rpm like 64 to 6700 rpm.and you are not moving very fast that would be prop related i think. if to much exhaust blows out around prop hub it can cause cavitation. small hub prop on big gearcase or to thick washer spacing prop to far off gearcase. either should only affect takeoff. once on plane there should not be a cavitation issue. maybe a spun prop hub slipping?

[dsmith looper man]

It's doing it commin out the hole and on plane between half an full if I cum off the throttle and is stops it will IDE fine etc just full throttle and half the rev limiter goes off

[davemvegas]

you need to say at what rpm it is at when rev limiter cuts in.

[phil blomquist]

What year is this motor? What prop are you running?Just a thought if the motors shaking something electrical might be the culprit Power pack possible.Need more information is this motor new to you or did it perform before you put it on?

[dsmith looper man]

The motor perform good on the gambler it just start doing this when I put it on the tunnel hull

[dsmith looper man]

The motor is an 88