Jump to content

ellicat

Recommended Posts

No, it's only getting up to 4000rpm even with throttle fully open. Then after a few minutes it slowly kicks in and goes normally. The engine is running as smooth as ever. No misfires or similar. Last time the computer said there was nothing wrong, so they thought it may have been a bad plug. Changed them and she had been going along fine since, until yesterday.

Link to comment
Share on other sites

13 hours ago, ellicat said:

No, it's only getting up to 4000rpm even with throttle fully open. Then after a few minutes it slowly kicks in and goes normally. The engine is running as smooth as ever. No misfires or similar. Last time the computer said there was nothing wrong, so they thought it may have been a bad plug. Changed them and she had been going along fine since, until yesterday.

Could it be a fuel issue Brian?

Link to comment
Share on other sites

13 hours ago, ellicat said:

No, it's only getting up to 4000rpm even with throttle fully open. Then after a few minutes it slowly kicks in and goes normally. The engine is running as smooth as ever. No misfires or similar. Last time the computer said there was nothing wrong, so they thought it may have been a bad plug. Changed them and she had been going along fine since, until yesterday.

Humm so engine purring along up to 4000rpm and no error codes / limp mode. I'm with @Andrew_P some sort of fuel or fuel line (cracked line / air leak) issue is the most likely.

Is the Throttle wide open or is the still further range....What about the throttle cable linkage being loose / stretched and requiring adjustment?

Link to comment
Share on other sites

6 minutes ago, Hweebe said:

Humm so engine purring along up to 4000rpm and no error codes / limp mode. I'm with @Andrew_P some sort of fuel or fuel line (cracked line / air leak) issue is the most likely.

Is the Throttle wide open or is the still further range....What about the throttle cable linkage being loose / stretched and requiring adjustment?

Yep. It doesn't seem electrical. It might be the computer itself. Checked the cable last time. Yes, full throttle.

Link to comment
Share on other sites

Well, I've dropped it in and I'll wait to hear the verdict. Hopefully it's a quick fix so I can get on the water.

A year ago I had a problem where the computer and fuel pump weren't talking and the computer needed replacing. Like Andrew said, it was $1500 for a new one and would be at least a week to get one in. They also had a 2nd hand one sitting on their shelf that they could put in that day. As I wanted to go fishing the next day, I opted for the 2nd hand one. It had something like 1800 hours on it but worked fine. I was happy to have saved the coin. Maybe that is now the problem.

Link to comment
Share on other sites

On 16/09/2022 at 2:48 PM, ellicat said:

Well I got her back with a new set of plugs again. They couldn't find anything wrong or replicate the problem.

Frustrating.

Seems it'll be a case of crossing my fingers everytime I go out, which is not ideal. 🤨

Do a plugs swap out on the water next time this happens so you can at least rule bad plugs out?

That's really frustrating and for me unnerving. Intermittent issues are the worse.

It may or may not be relevant for you but when my last Mercury Optimax had an intermittent engine gremlin - coincidently throttle wouldn't go wide open.

1st mech - tried plugs, then coils and the issue still occurred (intermittently).

2nd mech - found the actual issue was in the throttle lever (something had broken inside) - Only way he knew was he had seen it before

Pays to find an experienced mech.

 

Link to comment
Share on other sites

Yep, my mechanic is a Merc specialist with at least 30 years on the tools.

I've been wondering the same thing about the throttle, but I can still only get to 9knots when it is occurring. Normally when on the plane I'll get 15 -18 knots at 4000 revs. When it resolves itself the throttle is on WOT position and it gradually picks up, so not sure.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...