Honda 90HP - Runnung Ruff..help req

roddy18 · 04 October 2013, 16:46

Hi all, I have a Honda 90HP 2005 which I bought second hand and have no history to it. It was lying for 2 years. I sent the carbs away to a dealer to get serviced, when I pulled the leads off number 1 - no change in tone, then it fixed itself and was running fine. Went to it today and pulled the leads of 3 & 4 no change in tone ,Plugs were wet so was getting fuel. checked compression 180 180 180 190 in cylinders. There is sparks to all the leads. Do I need to balance the carbs would this help? , Or has anyone got any other suggestions as new to this. Also Tried to take lower unit off managed to get 5 bolts off but seems to be stuck? Cheers for your help anyone

jyasaki · 04 October 2013, 16:53

For the LU: You need to pull the trim tab; usually a bolt hidden under that. If it's really corroded/salted up, you may need a bit of persuasion with a rubber mallet (be careful not to crack the anti-ventilation plate though.)

For the other stuff: Wet plugs on a 4-stroke? Sounds like you're not getting spark to the plugs (at least not at the right time.) Did someone mess with the timing belt and get stuff really screwed up?

jky

Bigtalljv · 04 October 2013, 17:44

or start simple and make sure you got the right wire to the right plugs.

mick · 04 October 2013, 18:14

What's it like after it's warmed up a bit mine run a bit rough to start with Get the carbs balanced as well

Bigtalljv · 04 October 2013, 18:45

i have a service manual for a carb'd 2001 BF90. I'm not sure what years the manual covers. I sold the boat so I don't have a use for it if you are interested. I can check years on it.

roddy18 · 05 October 2013, 18:02

hi thanks for the replies. I started engine today it ran ruff for a while then started pulling the leads off 1,2,3,4 & the tone changed on all of them & left it ideling for 20 minutes so hope thats it fixed , but still cant get lower unit off. I got all the bolts out and its stuck on... its an extra long shaft - tried pizing it open & it just pulled itself close.....Anys suggestions again what am i doing wrong?

Ribochet · 05 October 2013, 20:54

If the engine runs rough again check out the operation of the choke ie that the choke solenoid isn't sticking or that the manual choke isn't partially pulled.

clydeoutboards · 08 October 2013, 07:55

is that castle bay on bara? stunning place.

oh re engine call 01475 744 215 ask for Cameron and he will sort you out.

Dave