Well this is the year that things start to finally go wrong..

[Cid6.7]

Ok So lets start off by saying till now I haven't really had a single real "problem" with my boat 97 challenger 1800

This year the ladder strap gets ripped off the front seat storage gets ripped off (no biggy) was towing a couple kids on a tube the other day when blahhhhhh no power grrrrrrrr ran fine all day long till then..So I've had this before gotta be the plugs I changed them this spring but thought we've been out quite a bit they gotta be done...

Today went got new plugs replaced them went to go for a drive swim & fish...Got to 3000 rpm then 3500 then nothing it'll rev up on both engines but that's it just rev & can smell unburnt fuel... They start up & idle just like new tho..

I'm a car guy not a boat guy I am mechanical somewhat (cant really fit in engine compartment..lol) on these little engines but don't even know where to start with something like this...

Anyone got any ideas..?

Peace

 

[LouDoo]

It sounds like cavitation but it's hard to imagine that both engines would be doing the same thing.

Lou

 

[Cid6.7]

Ok so I started with the easiest thing first checked in the impeller one had a piece of wood wedged in it & the other a nice sized piece or rope...So yeah was just unwrapping and cutting & cursing and cutting timber...I just dropped the weed gates & wiggied my arm in there & started cutting...feeoof

Pretty sure this was it sheesh thought I had to do something hard..LOL

 

[Cid6.7]

Yep that was the problem just junk in the water got in impellers

 

[Coastiejoe]

It is amazing how little of an item it takes for some pretty serious cavitation.